区块链考试题库,区块链考试的答案2021

近年来，区块链技术的快速发展使它成为一种热门技术，也带来了一系列新的考试题库。区块链考试的答案2021年的拓展关键词包括：智能合约、分布式账本和去中心化。

智能合约

智能合约是基于区块链技术的一种特殊的自动执行合同，它可以在区块链上执行许多复杂的操作，而无需任何人为干预。智能合约可以被用来实现复杂的交易，比如购买和出售资产，跨境支付，货币兑换，贷款和保险等。它可以帮助人们实现自动执行合同，从而减少交易成本，提高效率，减少欺诈和恶意行为的风险，并提供更好的安全性。

分布式账本

分布式账本是一种分布式数据库技术，它可以记录和存储交易信息，并使用共识机制来确保数据的安全性和可靠性。它可以帮助企业和机构更有效地管理财务，减少账务错误，并保护数据免受篡改和恶意攻击。此外，分布式账本还可以改善供应链的透明度，从而有助于提高企业的效率和可持续发展。

去中心化

去中心化是区块链技术的核心理念，它指的是在数据存储和交易处理中不需要中心化的第三方机构参与。去中心化的特点是，它不需要信任，不受任何第三方机构的控制，可以保护用户的隐私和数据安全，并且可以提高交易效率。此外，去中心化还可以帮助企业更好地管理财务，提高审计效率，改善安全性，并有助于企业可持续发展。

以上是区块链考试的答案2021年拓展关键词：智能合约、分布式账本和去中心化的介绍，这些技术可以帮助企业更好地管理财务，提高安全性，改善审计效率，减少交易成本，提高效率，更好地保护用户的隐私和数据安全，从而促进企业可持续发展。

请查看相关英文文档

㈠ 108 knowledge points for getting started with blockchain

1. What is blockchain

Combine the information of multiple transactions and indicate the area The information of the block is packaged together, and the verified package is the block.

Each block stores the hash value of the previous block, creating a relationship between blocks, that is to say, a chain. Together they are called blockchain.

2. What is Bitcoin

The concept of Bitcoin was proposed by Satoshi Nakamoto in 2009, with a total number of 21 million. The Bitcoin chain generates a block approximately every 10 minutes, and this block is mined by miners for 10 minutes. As a reward to miners, a certain number of Bitcoins will be issued to miners, but this certain number is halved every four years. Now it's 12.5. If this continues, all Bitcoins will be available in 2040.

3. What is Ethereum

The biggest difference between Ethereum and Bitcoin is the smart contract. This allows developers to develop and run various applications on it.

4. Distributed ledger

It is a database that is shared, replicated and synchronized among network members. To put it bluntly, all users on the blockchain have accounting functions and the content is consistent, which ensures that the data cannot be tampered with.

5. What is quasi-anonymity?

I believe everyone has a wallet, and the wallet address (a string of characters) used to send transactions is quasi-anonymity.

6. What is open transparency/traceability

The blockchain stores all data from history to the present, anyone can view it, and can also view any data in history.

7. What is tamper-proof

Historical data and current transaction data cannot be tampered with. The data is stored in the block on the chain and has a hash value. If the block information is modified, its hash value will also change, and the hash values ​​of all blocks following it must also be modified to form a new chain. At the same time, the main chain is still conducting transactions to generate blocks. The modified chain must always generate blocks synchronously with the main chain to ensure that the length of the chain is the same. The cost is too high, just to modify a piece of data.

8. What is anti-DDoS attack

DDoS: Hackers control many people’s computers or mobile phones and allow them to access a website at the same time. Since the bandwidth of the server is limited, a large amount of traffic The influx of data may cause the website to fail to function properly, resulting in losses. However, the blockchain is distributed and there is no central server. If one node fails, other nodes will not be affected. Theoretically, it is more than 51%If a node is attacked, problems will occur.

9. Definition of main chain

Taking Bitcoin as an example, at a certain point in time, a block is mined by two miners at the same time, and then 6 blocks are generated first. The chain of blocks is the main chain

10. Single chain/multi-chain

Single chain refers to the data structure that handles everything on one chain. The core essence of the multi-chain structure is composed of public chain + N sub-chains. There is only one, but in theory there can be countless sub-chains, and each sub-chain can run one or more DAPP systems

11. Public chain/alliance chain/private chain

Public Chain: Everyone can participate in the blockchain

Alliance chain: Only alliance members are allowed to participate in accounting and query

Private chain: Writing and viewing permissions are only controlled by one person In the hands of the organization.

12. Consensus layer, data layer, etc.

There are six overall structures of the blockchain: data layer, network layer, consensus layer, incentive layer, contract layer, and application layer. Data layer: a layer that records data, belonging to the underlying technology; network layer: a structure for building a blockchain network, which determines how users are organized. Consensus layer: Provides a set of rules to allow everyone to reach agreement on the information received and stored. Incentive layer: Design incentive policies to encourage users to participate in the blockchain ecosystem; Contract layer: Generally referred to as "smart contracts", it is a set of contract systems that can be automatically executed and written according to their own needs. Application layer: Applications on the blockchain, similar to mobile apps. Former Distributed Storage R&D Center

13. Timestamp

The timestamp refers to the time from January 1, 1970 Day 0 hours 0 minutes 0 seconds 0... The total number of seconds from the current time to now, or the total number of nanoseconds and other very large numbers. Each block is generated with a timestamp indicating when the block was generated.

14. Block/block header/block body

Block is the basic unit of blockchain, and block header and block body are components of blockchain. The information contained in the block header includes the hash of the previous block, the hash of this block, timestamp, etc. The block body is the detailed data in the block.

15. Merkle tree

Merkle tree, also called binary tree, is a data structure for storing data. The bottom layer is the original data contained in all blocks, and the upper layer is each The hash value of a block, the hash of this layer is combined in pairs to generate a new hash value, forming a new layer, and then upwards layer by layer, until a hash value is generated. Such a structure can be used to quickly compare large amounts of data. You can quickly find the bottom layer you want without downloading all the data.historical data.

16. What is expansion?

The size of a Bitcoin block is about 1M and can save 4,000 transaction records. Expansion means making the block larger so that more data can be stored.

17. What is a chain?

Each block will save the hash of the previous block, creating a relationship between the blocks. This relationship is a chain. Data such as block transaction records and status changes are stored through this chain.

18. Block height

This is not the height mentioned in terms of distance. It refers to the total number of blocks between the block and the first block on the chain. This height indicates which block it is, and is just for identification purposes.

19. Fork

Two blocks were generated at the same time (the transaction information in the block is the same, but the hash value of the block is different), and then in Two chains are forked from these two blocks. Whoever generates 6 blocks from these two links first will be the main chain, and the other chain will be discarded.

20. Ghost Protocol

Mining pools with high computing power can easily generate blocks faster than mining machines with low computing power, resulting in most of the blocks on the blockchain being generated by these mining pools with high computing power. However, the blocks generated by mining machines with low computing power are not stored on the chain because they are slow, and these blocks will be invalid.

The ghost protocol allows blocks that should be invalidated to remain on the chain for a short time, and can also be used as part of the proof of work

. In this way, miners with small computing power will contribute more to the main chain, and large mining pools will not be able to monopolize the confirmation of new blocks.

21. Orphan blocks

As mentioned before, orphan blocks are blocks generated at the same time. One of them forms a chain, and the other does not form a chain. Then this block that does not form a chain is called an orphan block.

22. Uncle block

The orphan block mentioned above, through the ghost protocol, makes it part of the proof of work, then it will not be discarded and will be saved in the main chain superior. This block is the next

23 replay attack

The hacker resends the message that has been sent to the server. Sometimes this can deceive the server into multiple responses.

24. Directed acyclic graph

Also called data set DAG (directed acyclic graph), DAG is an ideal multi-chain data structure. Most of the blockchains we talk about now are single chains, that is, one block connected to another block, and DAG is multiple blocks.connected. The advantage is that several blocks can be generated at the same time, so the network can process a large number of transactions at the same time, and the throughput will definitely increase. However, there are many shortcomings and it is currently in the research stage.

25. What is mining

The mining process is to perform a series of conversions, connections and hash operations on the above six fields, and continue to try them one by one. The random number you are looking for, and finally successfully find a random number that meets the conditions: the value after hashing is smaller than the hash value of the preset difficulty value, then the mining is successful, and the node can broadcast the area to neighboring nodes. block, neighboring nodes receive the block and perform the same operation on the above six fields to verify compliance, and then forward it to other nodes. Other nodes also use the same algorithm to verify. If there are 51% of nodes in the entire network If all verifications are successful, even if this block is truly "mined" successfully, each node will add this block to the end of the previous block, delete the list in the block that is the same as its own record, and resurrect again. the above process. Another thing to mention is that regardless of whether the mining is successful or not, each node will pre-record the reward of 50 Bitcoins and the handling fees of all transactions (total input-total output) in the first item of the transaction list (this is " The most fundamental purpose of "mining" is also the fundamental reason to ensure the long-term stable operation of the blockchain), the output address is the address of this node, but if the mining is unsuccessful, the transaction will be invalidated without any reward. Moreover, this transaction called "production transaction" does not participate in the "mining" calculation.

26. Mining machines/mining farms

Mining machines are computers with various configurations, and computing power is the biggest difference between them. A place where mining machines are concentrated in one place is a mining farm

27. Mining pool

Miners join together to form a team, and the computer group under this team is a mining pool. Mining rewards are distributed based on your own computing power contribution.

28. Mining difficulty and computing power

Mining difficulty is to ensure that the interval between generating blocks is stable within a certain short time, such as Bitcoin’s 10 minutes.

p>

Block 1. The computing power is the configuration of the mining machine.

29. Verification

When verification in the blockchain is a confirmation of the legality of the transaction, each node will verify the transaction once when the transaction message is propagated between nodes. Whether the transaction is legal. For example, verify whether the syntax of the transaction is correct, whether the transaction amount is greater than 0, whether the entered transaction amount is reasonable, etc. After passing the verification, it will be packaged and handed over to the miners for mining.

30. Transaction broadcast

The node sends information to other nodes through the network.

31. Mining fees

For the blockchain to work non-stop like a perpetual motion machine, miners need toMaintain this system. Therefore, the miners must be given favorable fees to make it sustainable.

32. Transaction confirmation

When a transaction occurs, the block recording the transaction will be confirmed for the first time, and will be confirmed in every area on the chain after the block. Block is reconfirmed: When the number of confirmations reaches 6 or more, the transaction is generally considered safe and difficult to tamper with.

33. Double transaction

That is, I have 10 yuan, I use the 10 yuan to buy a pack of cigarettes, and then instantly use the 10 yuan that has not yet been paid. Bought another cup of coffee. So when verifying the transaction, you need to confirm whether the 10 yuan has been spent.

34. UTXO unspent transaction output

It is a data structure containing transaction data and execution code, which can be understood as digital currency that exists but has not yet been consumed.

35. Transactions per second TPS

That is throughput, tps refers to the number of transactions the system can process per second.

36. Wallet

Similar to Alipay, it is used to store digital currencies, and blockchain technology is more secure.

37. Cold wallet/hot wallet

A cold wallet is an offline wallet. The principle is to store it locally and use QR code communication to prevent the private key from touching the Internet. A hot wallet is an online wallet. The principle is to encrypt the private key and store it on the server. When it is needed, it is downloaded from the server and decrypted on the browser side.

38. Software Wallet/Hardware Wallet

A software wallet is a computer program. Generally speaking, a software wallet is a program that interacts with the blockchain and allows users to receive, store, and send digital currencies and can store multiple keys. Hardware wallets are smart devices that specialize in handling digital currencies.

39. Airdrop

The project sends digital currency to each user’s wallet address.

40. Mapping

Mapping is related to the issuance of blockchain currency and is a mapping between chains. For example, there are some blockchain companies that have not completed the development of the chain in the early stage. They rely on Ethereum to issue their own currency. The issuance and transactions of the early currency are all operated on Ethereum. With the development of the company, the company's own chain development has been completed. The company wants to map all the previous information on Ethereum to its own chain. This process is mapping.

41. Position

Refers to the ratio of the investor’s actual investment to the actual investment funds

42. Full position

Buy with all funds Deposit Bitcoin

43． Reduce the position

Sell some of the Bitcoins, but not all of them

44. Heavy positions

Compared with Bitcoin, Bitcoin accounts for a larger share of funds

45. Short position

Compared with Bitcoin, the share of funds is larger

46. Short position

Sell all the Bitcoins you hold and convert them all into funds

47. Stop loss

After obtaining a certain profit, sell the Bitcoin held to keep the profit

48. Stop loss

After losses reach a certain level, sell the Bitcoins you hold to prevent further losses

49. Bull market

Prices continue to rise and the outlook is optimistic

50. Bear market

The price continues to fall, and the outlook is bleak

51. Long (long)

The buyer believes that the currency price will rise in the future, buys the currency, and waits for the currency price After rising, sell at a high price to take profits

52. Short position (short selling)

The seller believes that the currency price will fall in the future, and sells the currency he holds (or borrows it from the trading platform) (coin) sell, wait for the price of the currency to fall, buy at a low price to take profits

53. Open a position

Buy virtual currencies such as Bitcoin

54 . Cover the position

Buy Bitcoin and other virtual currencies in batches, for example: buy 1 BTC first, and then buy 1 BTC later

55. Full position

All funds are purchased at one time to buy a certain virtual currency

56. Rebound

When the currency price falls, the price rebounds and adjusts because it falls too fast

57 .Consolidation (sideways)

The price fluctuation is small and the currency price is stable

58. Yin fall

The currency price declines slowly

59. Diving (waterfall)

The currency price fell rapidly and to a large extent

60. Cutting meat

After buying Bitcoin, the currency price fell, as Avoid expanding losses and selling Bitcoin at a loss. Or after borrowing the currency to go short, the currency price rises, and you buy Bitcoin at a loss

61. Hold on

Expect the currency price to rise, but unexpectedly the currency price falls after buying; or expect the currency price fell, but unexpectedly after selling, the currencyHowever, the price rose

62. Unwinding

After buying Bitcoin, the price fell, causing a temporary book loss, but then the price rebounded and the loss turned into profit

63. Going short

After selling Bitcoin because of the bearish market outlook, the price of the currency continued to rise. I was unable to buy it in time, so I failed to make a profit

64. Overbought

The currency price continues to rise to a certain height, the buyer's power is basically exhausted, and the currency price is about to fall

65. Oversold

The currency price continues to fall to a certain low At this point, the seller's power has basically been exhausted, and the currency price is about to rebound

66. Lure bulls

The currency price has been consolidating for a long time, and it is more likely to fall. Most short sellers have sold Bitcoin. Suddenly the short side pulls up the currency price, inducing many parties to think that the currency price will rise and buy one after another. As a result, the short side suppresses the currency price and locks in the long side

67. Short-selling

After the bulls bought Bitcoin, they deliberately suppressed the price of the currency, making the short sellers think that the price of the currency would fall and sell them one after another. As a result, they fell into the trap of the bulls

68. What is NFT

The full name of NFT is "Non-Fungible Tokens", which is non-fungible tokens. Simply put, it is an indivisible copyright certificate on the blockchain, and its main function is to confirm the digital assets. The difference between rights and transfers and digital currency is that it is unique and indivisible. In essence, it is a unique digital asset.

69. What is the Metaverse

The Metaverse is a collection of virtual time and space, consisting of a series of augmented reality (AR), virtual reality (VR) and the Internet (Internet) Composed of digital currency, which carries the function of value transfer in this world.

70. What is DeFi

DeFi, the full name is Decentralized Finance, which is "decentralized finance" or "distributed finance". "Decentralized finance", as opposed to traditional centralized finance, refers to various financial applications based on open decentralized networks. The goal is to establish a multi-level financial system based on blockchain technology and cryptocurrency. As a basis, re-create and improve the existing financial system

71. Who is Satoshi Nakamoto?

72. Bitcoin is different from Q Coin

Bitcoin is a decentralized digital asset with no issuing entity. Q Coin is an electronic currency issued by Tencent. It is similar to electronic points, but it is not actually a currency. Q coins need to be issued in a centralized mannerInstitutions, Q coins can only be recognized and used because of the credit endorsement of Tencent. The scope of use is also limited to Tencent's games and services. The value of Q coins is entirely based on people's trust in Tencent.

Bitcoin is not issued through a centralized institution, but it is widely recognized around the world because Bitcoin can self-certify its trust. The issuance and circulation of Bitcoin are jointly accounted for by miners across the entire network, and are not A central authority is also needed to ensure that no one can tamper with the ledger.

73. What is a mining machine?

Taking Bitcoin as an example, a Bitcoin mining machine is a professional equipment that competes for accounting rights by running a large amount of calculations to obtain new Bitcoin rewards. It is generally composed of a mining chip, a heat sink and a fan, and only performs A single calculation program consumes a lot of power. Mining is actually a competition between miners for computing power. Miners with more computing power have a greater probability of mining Bitcoin. As the computing power of the entire network increases, it becomes increasingly difficult to mine bits with traditional equipment (CPU, GPU), and people have developed chips specifically for mining. The chip is the core part of the mining machine. The operation of the chip will generate a large amount of heat. In order to dissipate heat, Bitcoin mining machines are generally equipped with heat sinks and fans. Users download Bitcoin mining software on their computers, use the software to assign tasks to each mining machine, and then start mining. Each currency has a different algorithm and requires different mining machines.

74. What is quantitative trading?

Quantitative trading, sometimes also called automated trading, refers to the use of advanced mathematical models to replace human subjective judgments, which greatly reduces the impact of investor sentiment fluctuations and avoids extreme fanaticism or pessimism in the market. make irrational investment decisions. There are many types of quantitative trading, including cross-platform trading, trend trading, hedging, etc. Cross-platform trading means that when the price difference between different target platforms reaches a certain amount, sell on the platform with a higher price and buy on the platform with a lower price.

75. Blockchain asset over-the-counter trading

Over-the-counter trading is also called OTC trading. Users need to find their own counterparties and do not need to match the transaction. The transaction price is determined by negotiation between the two parties. The two parties can fully communicate through face-to-face negotiation or telephone communication.

76. What is a timestamp?

The blockchain ensures that each block is connected sequentially through timestamps. Timestamps enable every piece of data on the blockchain to have a time stamp. Simply put, timestamps prove when something happened on the blockchain and cannot be tampered with by anyone.

77. What is a blockchain fork?

Upgrading software in a centralized system is very simple, just click "Upgrade" in the app store. However, in decentralized systems such as blockchain, "upgrading" is not that simple, and a disagreement may even cause a blockchain fork. Simply put, a fork refers to a blockA disagreement occurred when the chain was being "upgraded," resulting in a blockchain fork. Because there is no centralized organization, every code upgrade of digital assets such as Bitcoin needs to be unanimously recognized by the Bitcoin community. If the Bitcoin community cannot reach an agreement, the blockchain is likely to form a fork.

78. Soft fork and hard fork

Hard fork means that when the Bitcoin code changes, the old nodes refuse to accept the blocks created by the new nodes. Blocks that do not comply with the original rules will be ignored, and miners will follow the original rules and create new blocks after the last block they verified. A soft fork means that old nodes are not aware of the changes to the Bitcoin code and continue to accept blocks created by new nodes. Miners may work on blocks they have no understanding of, or validation of. Both soft forks and hard forks are "backwards compatible" to ensure that new nodes can verify the blockchain from scratch. Backward compatibility means that new software accepts data or code generated by old software. For example, Windows 10 can run Windows XP applications. Soft forks can also be "forward compatible".

79. Classification and application of blockchain projects

Judging from the current mainstream blockchain projects, blockchain projects mainly fall into four categories: Category 1: Currency; The second category: platform category; the third category: application category; the fourth category: asset tokenization.

80. USDT against the US dollar

USDT is Tether USD, a token launched by Tether that is against the US dollar (USD). 1USDT=1 US dollar, users can use USDT and USD for 1:1 exchange at any time. Tether implements a 1:1 reserve guarantee system, that is, each USDT token will have a reserve guarantee of 1 US dollar, which supports the stability of the USDT price. The unit price of a certain digital asset is USDT, which is equivalent to its unit price in US dollars (USD).

81. Altcoins and alternative coins

Altcoins refer to blockchain assets that use the Bitcoin code as a template and make some modifications to its underlying technology blockchain, among which Those with technological innovations or improvements are also called alternative coins. Because the Bitcoin code is open source, the cost of plagiarism in Bitcoin is very low. You can even generate a brand new blockchain by simply copying the Bitcoin code and modifying some parameters.

82. Three major exchanges

Binance: https://accounts.binancezh.ac/zh-CN

Okex: https://www .ouyi.top/

Huobi: https://www.huobi.af/zh-cn

83. Market software

Mytoken: http://www.mytoken.com/

Non-small account: https://www.feixiaohao.co/

84. Information website

Babbitt: https://www.8btc.cn

Golden Finance: http://www.jinse.com/

Coin World News: http://www.bishijie.com

85. Blockchain Browser

BTC: https://btc.com/

< p> ETH: https://etherscan.io/

BCH: https://blockchair.com/bitcoin-cash/blocks

LTC: http://www.qukuai .com/search/ltc

ETC: https://gastracker.io/

86. Wallet

Imtoken: https://imatoken.net/

Bitpie: https://bitpie.com/

87. Decentralized Exchange

uniswap: https://uniswap.org

p>

88. NFT Exchange

Opensea: https://opensea.io

Super Rare: https:/ /superrare.com/

89. Ladders

Bring your own, buy reliable ladders

90. Platform coins

Issued by the platform Digital currency, used to deduct handling fees, transactions, etc.

91. Bull market, bear market

Bull market: rising market

Bear market: falling market

92. Blockchain 1.0

A currency trading system based on distributed ledgers, represented by Bitcoin

93. Blockchain 2.0

Based onThe contract blockchain technology represented by Ethereum (smart contract) is 2.0

94. Blockchain 3.0

In the era of intelligent Internet of Things, it goes beyond the financial field and provides services for various industries. Decentralized solutions

95. Smart Contract

Smart Contract is a computer protocol designed to disseminate, verify or execute contracts in an information-based manner. Simply put , set an electronic contract in advance, and once both parties confirm, the contract will be automatically executed.

96. What is a token?

The token economy is an economic system with Token as the only reference standard, which is equivalent to a pass. If you own Token, you have rights and interests, and you have the right to speak.

Big data is the means of production, AI is the new productivity, and blockchain is the new production relationship. Big data refers to a collection of data that cannot be captured, managed and processed within a certain time range using conventional software tools. It is a massive, high-growth and high-volume data set that requires new processing models to have stronger decision-making power, insight discovery and process optimization capabilities. Diverse information assets. Simply understood, big data is massive data accumulated over a long period of time and cannot be obtained in the short term. Blockchain can be used as a way to obtain big data, but it cannot replace big data. Big data is only used as a medium running in the blockchain and has no absolute technical performance, so the two cannot be confused. (A simple understanding of production relations is labor exchange and consumption relations. The core lies in productivity, and the core of productivity lies in production tools)

ICO, Initial Coin Offering, initial public token issuance, is the first step in the blockchain digital currency industry. Crowdfunding. It is the most popular topic and investment trend in 2017, and the country launched a regulatory plan on September 4. Speaking of ICO, people will think of IPO, and the two are fundamentally different.

99. Five characteristics of digital currency

The first characteristic: decentralization

The second characteristic: having open source code

The third feature: independent electronic wallet

The fourth feature: constant issuance

The fifth feature: global circulation

100. What is decentralization?

It has no issuer, does not belong to any institution or country, and is a publicly issued currency designed, developed and stored on the Internet by Internet network experts.

100. What is measurement (scarcity)?

Once the total amount of issuance is set, it is permanently fixed, cannot be changed, cannot be over-issued at will, and is subject to global Internet supervision. due to excavation andAlthough the mining difficulty changes over time, the longer the time, the more difficult it is to mine, and the fewer coins will be mined, so it is scarce.

101. What is open source code?

The alphanumeric code is stored on the Internet. Anyone can find out the source code of its design, everyone can participate, can mine it, and it is open to the world.

102. What is anonymous transaction? Private wallet private?

Everyone can register and download the wallet online without real-name authentication. It is completely composed of encrypted digital codes. It can be sent and traded globally in real-time point-to-point without resorting to banks or any institutions. It cannot be traced by anyone without my authorization. ,Inquire.

A contract transaction refers to an agreement between a buyer and seller to receive a certain amount of an asset at a specified price at a certain time in the future. The objects of contract trading are standardized contracts formulated by the exchange. The exchange stipulates standardized information such as commodity type, transaction time, quantity, etc. A contract represents the rights and obligations of the buyer and seller.

105. Digital Currency Industry Chain

Chip manufacturers, mining machine manufacturers, and mining machine agents mine and export to exchanges for retail investors to speculate in coins< /p>

106. Who is Erben?

Erben: Digital Currency Value Investor

Investment style: Steady

Building a community: Erben’s Miscellaneous Talks (High Quality Price Investment Community)

p>

107. Two investment strategies

Combining long and short term, focusing on price investment, no touching contracts, no short-term play

Reasonable layout, scientific operation, prudent and conservative, making periodic money

108. Two books?

Welcome currency friends and seek common development

Is Introduction to Blockchain an open-book exam?

Introduction to Blockchain is an open-book exam. According to information released on relevant websites, we learned that Introduction to Blockchain is an open-book exam. The Introduction to Blockchain first tells the history of the development of human currency, the birth of Bitcoin, and the core principles of Bitcoin. wait.

㈢ What are the requirements for applying for blockchain engineer qualifications in 2021

[Introduction] To apply for blockchain engineer qualifications in 2021, you naturally need to obtain the corresponding qualification certificate. Of course, when applying for the exam, the application conditions for blockchain engineers at different levels are different. There are requirements for academic qualifications and working years, so 2What are the application requirements for blockchain engineer qualifications in 2021? Let’s learn more about it next.

1. Assistant blockchain engineer:

1. College degree or above or equivalent.

2. Those with secondary vocational education or above or equivalent education and have been engaged in relevant work for more than one year.

3. Applicants with secondary vocational education or equivalent education and excellent professional knowledge and practical skills.

2. Blockchain engineers:

1. Those who have passed the assistant blockchain engineer qualification certification.

2. Bachelor degree or above or equivalent.

3. College degree or above or equivalent, and those who have been engaged in relevant work for more than two years.

4. College degree or equivalent, with outstanding professional knowledge and practical skills.

3. Senior Blockchain Engineer:

1. Those who have passed the Blockchain Engineer Qualification Certification.

2. Graduate degree or above or equivalent.

3. Bachelor degree or above or equivalent education, and those who have been engaged in relevant work for more than two years.

4. College degree or above or equivalent, and those who have been engaged in relevant work for more than three years.

This is the introduction to the application requirements for blockchain engineer qualifications in 2021. As long as you meet the necessary application and application conditions, you can participate in such exams. I hope you will prepare well and work hard. !

㈣ Domestic blockchain system learning, where is the professional training?

There is a "Chain Academy" in Beijing, with weekend classes for technical classes, and regular online and offline classes courses.

㈤ Blockchain Adult Self-Study, Blockchain Vocational Education System

2019-10-31 10:18
As the country regards blockchain as a strategic technology, It also pointed out the direction that will bring substantial changes to social development. It is imperative to actively promote the application of blockchain technology in education, employment and other fields. Blockchain has once again become the focus of market attention.
In fact, Zhengbao has been actively exploring the application of blockchain in the field of vocational education in recent years, and has achieved initial results.
Zhengbao Self-study Examination 365 (book020) online school has launched a self-study examination network assistance platform based on blockchain technology and co-constructed with universities (hereinafter referred to as the self-study examination assistance platform). The platform uses blockchain technology to record and certify the process evaluation results of higher education self-study examinations, and is committed to realizing full online management of continuing education and certification of electronic score certificates, and building a true information management platform for continuing education in colleges and universities.
The Guangxi Higher Education Self-study Examination Online Tutoring Platform launched by Zhengbao is the only online tutoring platform designated by the Guangxi Admissions and Examination Institute. The final score of the self-study tutoring course is a combination of the online tutoring process assessment results and the written test scores. , including Zhengbao Self-study Examination 365 Network
Guangxi University, Guangxi University for Nationalities, Guangxi Normal University, Guilin University of Electronic Science and Technology and many other schools have joined the self-study examination online teaching platform.
Currently, 70 countries and regions recognize the academic qualifications and degrees of higher education self-study examinations.
In order to ensure the credibility of process assessment results, the self-study assistance platform uses blockchain technology to write data on the education and training process, assessment links and other data into the blockchain to provide sharing and certification services.
Students can complete online learning and review of each course, pre-graduation degree examination, thesis application and other aspects through the self-study assistance platform. The platform provides blockchain electronic certificates and score details for each teaching link, and the results can be traced and Certifiable for easy graduation review and user preferences.
Student Certificate
Relying on its own educational competence circle, Zhengbao Self-Study 365 adopts blockchain technology and uses its centralized, verifiable, and tamper-proof technical features to build real continuing education information for colleges and universities It provides reliable data support for personal career planning and provides students, schools and employers with reliable data support in the learning process
Since its establishment in 2000, Zhengbao Distance Education has been focusing on vocational education and services.
In recent years, Zhengbao has continuously explored the application of blockchain technology in the education industry and launched the "Professional Competency Chain", which takes user capabilities as the core and provides strong endorsement for users' credit information, employment, study, qualification certification and other information. Assist personal career development.
At present, the Link100 professional ability chain launched by Zhengbao has obtained the domestic blockchain information service registration number in 2019.
Maintain investment and attention to cutting-edge technologies in the field of educational blockchain, become the first batch of practitioners, continuously improve the construction of a lifelong education system based on blockchain technology, and provide students with vocational education products and vocational skills data support platforms .
(Editor) Justin Jimochi
Reprinting of copyrighted works without the written permission of Global Times huanqiu.com is strictly prohibited, and violators will be held legally responsible.

If you have questions about the self-study/adult examination, don’t know the content of the self-study/adult examination, or don’t know the local self-study/adult examination policy, click the bottom to consult the official website teacher and receive free review materials: https://www. 87dh.com/xl/

㈥ What is the Blockchain 1+X Certificate exam?

The Blockchain 1+X Certificate exam content is as follows:

Blockchain The assessment content of the Chain 1+X certificate mainly includes two parts: theoretical assessment and practical assessment. Take Shijiazhuang Vocational and Technical College as an example: the blockchain exam covers detailed content such as blockchain system application operations, blockchain business analysis and design, business planning, business development implementation, and business optimization.

The meaning of Organizational Blockchain 1+X:

“1+X” Blockchain System Application and Design (Intermediate) Vocational Skills Level Certificate The successful holding of training and certification examinations will help promote the "three education reforms" and play a positive role in assisting the cultivation of high-quality compound blockchain talents, improving students' employment competitiveness, and serving the economic development of the blockchain industry.

Reference for the above content: Shijiazhuang Vocational and Technical College-1+X Blockchain System Exam

㈦ What are the nationally recognized blockchain certificates? If you want to apply, the unified exam is at Where to sign up

The first official certification certificate in the blockchain field
The Talent Exchange Center of the Ministry of Industry and Information Technology is the first and only official certification agency in the domestic blockchain field!
The certificates issued by it can be used as an important basis for professional ability assessment, job recruitment, appointment, grading and promotion of many professional and technical personnel.

㈧ 2022-03-20

Golden Finance https://www.jinse.com/news/blockchain/1445247.html

China Blockchain Net http://www.innwn.com/hangye/2022/0511/50545.html

Sohu https://www.sohu.com/a/545877559_120645540

NetEase https://3g.163.com/dy/article/H73DPAU10552UMCR.html

Today’s Toutiao https://www.toutiao.com/article/7096295534528348712/

China Economic News Network https://www.cet.com.cn/wzsy/kjzx/3176841.shtml

China Economic News Network https://hea.china.com/article/20220511/052022_1064382.html

Huicong Network http://www.broadcast.hc360.com/2022/0511/18039.html

China Blockchain Network http://qukuailian.jhrbs. com/guonei/2022/0511/1259.html

Blockchain Network http://www.qklbk.cn/jishu/1625.html

Blockchain Evening News http://www.qklwb.net/article/4442.html

Technology Emperor Blockchain http://www.kejidi.cn/chain/20220511/29656.html

Blockchain Daily Network https://www.trzrb.com/chain/8384.html

Blockchain Circle http://www.qklq .com.cn/article/3436.html

Blockchain Economy Network http://www.blockchaineconomy.com.cn/be/2022/05/11/30169.html

China Research Network - Finance https://finance.chinairn.com/News/2022/05/11/113731361.html

China Morning News http://www.zhcpw.lwgcw.com /caijing/2022/0511/052022_736.html

Xinyang Evening News https://wanbao.xyxww.com.cn/html/2022-05/11/20883.html

Financial Investment Network http://mail.dzwindows.com/mail/2022/0511/41561.html

China Economic Talk http://finance.cqkxzx.net/caijing/20220511 /18175.html

International Times http://www.cwan.com/xinwen/2022/0511/052022_47634.html

Science and Technology News http: //www.sta.gd.cn/kuaixun/20220511/36023.html

Financial Express http://news.17car.com.cn/redian/2022/0511/052022_278249.html< br />
International News Shanying Network http://www.intnews.cn/v1/674356.aspx

Xinyang Daily https://ribao.xyxww.com.cn/html /2022-05/11/202813.html

Gansu Zero Distance http://www.gs090.com/news/shangwu/46640.html

Southern Enterprise News Network http://www.senn.com.cn/sx/2022/05/11/133678.html

Pacific Hotline http://cq .eeju.com/xiaofei/2022/0511/052022_28337.html

International Industry Network http://chanye.cwan.com/xinwen/2022/0511/052022_47308.html

/> New News Network http://www.xinbaoyewang.com/v-1-70507.html

Global Weekly Network http://zhoukan.cc/jujiao/2022/0511/052022_74551. html

Caixin Online http://www.caixinzaixian.com/v-1-90343.html

Shangdu.com http://it.shang.com/jujiao /2022/0511/0511127475.html

Immediate news http://www.thejike.com/v-1-59723.html

New China Bazhong http:// www.cnbzol.com/gd/20220511/052022_484230.html

Meng News http://www.mengnews.cn/v-1-364632.html

China Venture Capital Network http://chuangye.xunjk.com/chuangye/2022/0511/229922.html

Aimuvogue Network http://www.aimuvogue.com/v-1-573694.aspx< br />
American Times English Website

http://weeklytimesnet.com/c1/857.html

Los Angeles Times English Website
< br /> http://losangelestimesnet.com/c2/944.html

New York Daily News English Network

http://newyorkdailynet.com/c1/911.html

The Guardian English Network

http://ukguardiannet.com/c1/969.html

U.S. New Technology English Website

http://usnewtechnology.com/c1/889.html

World News Information Network

http://worldnewstimesnet.com/c1/811.html

Wired Magazine English Network

http://uswiredmagazine.com/c3/798.html< br />
Emirates News English Network

http://uaenewsnet.com/c2/896.html

Global Views Life English Network
< br /> http://globalviewlife.com/c1/791.html

China Industry Network http://www.iincn.com.cn/news/2022-05-11/2351-1 .html

Blockchain Weekly http://www.qklzk.net/block/3154.html

Blockchain Online http://www.vipkr.cn /xinwen/202205/1143877.html

Blockchain Information Network http://www.mingtiang.cn/news/202205/1143878.html

Blockchain Finance Net https://www.lzcaijing.cn/news/739.html

Focus on blockchain http://www.jjqkl.net/block/3057.html

China Blockchain News Network http://www.blockchainnews.com.cn/bfm/2022/05/11/44280.html