高三区块链知识考试题及答案,区块链100道选择题

A. Introduction to Blockchain (1) - Let’s keep accounts together

When I was a child, I was very curious about many novel things and full of desire to understand and learn. , at that time countless exclamation marks often appeared in my brain. As I grow older and gain more experience, this kind of experience becomes less and less common, and I am not surprised by the new things that many people follow. When "blockchain" first appeared, I was completely attracted. After that, just like when I was a child, I was instinctively driven to learn and understand deeply, and found that "blockchain" is a new world that is about to come. s future.

The first time I heard the word "Blockchain" was in teacher Li Xiaolai's column "The Road to Financial Freedom", and I read it many times in the column after that. to the emergence of this term. Out of curiosity, I followed and read the articles on Lao Mao's public account "Cat Talk", and gradually gained a 0 to 1 understanding of the blockchain. block-block, chain-chain, blockchain-connect the blocks one by one into a chain, imagine the DNA extending infinitely in front of you...

This paragraph is about blocks on the network An explanation of the chain, to put it in simpler terms, the blockchain is an open, decentralized, trustless, and jointly maintained accounting system.

Let’s first look at the traditional centralized banking business model. When we do transactions, why do we need third-party centralized companies such as banks, Alibaba, and Tencent? Because there is no trust between people. A lends B 100 yuan today. If B does not recognize the loan tomorrow, what will A do? The bank helps solve this problem. Everyone creates a real-name certified account in the bank. With the help of this centralized company, A lends 100 yuan to the bank (deposit), and B takes out 100 yuan from the bank (withdraw/borrow). Then the bank Responsible for recording this transaction, A's account will be 100 yuan more, while B's account will be 100 yuan less. This method of relying on third-party centralized companies for accounting can be seen everywhere in our lives: for online shopping, we need Alibaba's Taobao City and JD.com; for loans, we need to find reliable small loan companies; for new books, we need to go through a certain publishing house... …In the final analysis, it’s because people don’t trust each other, or the risks and costs of maintaining trust are too high, so we need such centralized and powerful third-party companies to endorse transactions and let them Taking these risks, of course, they also make us money. However, relying on third-party centralized business models has brought us inefficient services, cumbersome procedures and diversion of value, such as banks queuing up to handle business, the lending process of small loan companies, and Taobao and JD.com’s rent collection from merchants. , the publisher’s share of the author’s manuscript fee, etc. This is the centralized, third-party trust-based world we currently live in.

The blockchain world is a new world where no third party is needed and all transaction informationIt's all public and everyone participates in accounting! As the world's first proven and feasible blockchain application, Bitcoin subverts the traditional financial model by using automatic accounting and open accounting, information cannot be tampered with, and can be queried at any time, bypassing third-party centralization. Buyers and sellers conduct transactions directly. Such a transaction model must be efficient, low-cost, and open. Just imagine if blockchain technology becomes popular in the future, when you want to transfer a large amount of money to a friend abroad, you can skip the lengthy steps and get it instantly; if you write a book and publish it, you don’t have to worry about being pirated. There is no need for the publisher to earn your royalties; a peer-to-peer mutual insurance platform will be built directly between people, and the insurance company will become a consulting company, etc. (In fact, Bitcoin and Press.one are realizing such a subversion)

The Internet is currently booming. We have Didi taxis or shared bicycles for outside work, Ele.me for ordering food, and Ele.me for dining in restaurants. Dianping, convenient payment via WeChat and Alipay is everywhere. When we pay on the Internet, we need to rely on a third-party platform company trusted by both buyers and sellers to complete the transaction for us. These third-party companies have a large amount of transaction data and information on both parties to the transaction. If a hacker intrusion occurs and information is lost, we will bear the consequences for our "trust risk"; not to mention the delays caused by reviewing and clearing transaction data. The inconvenience, and the huge cost of managing such a huge amount of data.

So how is blockchain technology implemented? For example, if there is an army that wants to seize an enemy fortress, and each soldier wears a special helmet with a red button, each time a fortress is captured, the army headquarters will award a medal. First, there is a soldier A who takes the lead in occupying the first fortress 1. He announces to other comrades through his helmet that he has occupied fortress 1. At this time, the helmet will record the coordinate information of fortress 1 and pass it to other soldiers along with A's shouting. All soldiers and others heard A's shouting through the helmet and pressed the red button to indicate that the message had been recorded simultaneously. Then everyone knows that fortress 1 has been occupied by A, and A is rewarded with a medal. Then others will immediately capture other fortresses and broadcast their achievements in the same way. In this way, the information that different fortresses were captured by different soldiers in this battle is all stored in everyone's helmet. Here, the helmet is the public ledger (strictly speaking, the helmet's program), and everyone participates in accounting; each capture information constitutes a block, and all information arranged in a certain order forms a blockchain; In addition to keeping accounts (pressing the red button), participants also scramble to grab the right to package new data (capture the fortress).

So let’s take a look at the advantages of this joint accounting method. 1. Decentralization. The ledger is recorded and maintained by everyone. It doesn’t matter who records it first, because there are incentives (medals), someone will do it, and there is no need for a third party to intervene (it does not require the command of a general or the operations department, reducing military expenses and the risk of sacrifice of the commander). 2. Data cannot be tampered with. If you want to modify the accounted data, you must modify more than 51% of the node information to succeed. Just imagine, if this army has one million people (actually the number of blockchain nodes is much larger than this number), it would be an almost impossible task to modify the helmets of more than half of the army. 3. Information is open and transparent. Everyone can check this transaction information in their own ledger (all fortress capture information has been recorded in everyone's helmet).

This is the first article I started writing. The last time I wrote so many words was probably in the college entrance examination. The first article was about a new field that I had never touched before. The text was a bit confusing and mediocre, and I didn’t know whether the analogy I made was correct or not, but I finally started to do it. Writing is indeed a skill that everyone should have, and it is a skill that can be improved through deliberate practice and urge yourself to maintain it.

B. What are the basic performance characteristics of Jinwowo’s blockchain technology?

Chongqing Jinwowo’s analysis of the basic performance characteristics of blockchain technology is as follows:
1-Decentralization: The blockchain adopts decentralized auditing and accounting, that is, all participants collectively review records and update the ledger;
2-Trustless mechanism: Due to the decentralized openness of the blockchain network nature, so that each participating node does not have to trust the endorsement of a centralized organization;
3-The non-tamperability of information: In this decentralized network, all nodes participate in recording and proofreading information, and the privacy of a single node False information cannot be recorded if the behavior is not recognized by other nodes, and once a new block information is formed, it will be recorded by the blockchain network. It is meaningless for a single node to tamper with transaction information and cannot be obtained. Recognition of other nodes.

C. Principles of Blockchain Technology

The application of Blockchain technology in life has just begun, but the changes it has brought are huge. This change comes from all aspects and will have an important impact on the lives of ordinary people.

“The current college entrance examination determines life for a lifetime, but if we use blockchain, we can record all the learning records and extracurricular activities of a child from the time he enters school at the age of six to the college entrance examination. Then The examiner of the college entrance examination does not need to pass a test or an interview to determine the talent selection, but can decide what kind of talent he wants through all their records."

Regarding the application of blockchain technology, Qin Yi, Deloitte Global Financial Services Partner, said this when introducing it to Jinping Media.

Regarding blockchain, most of the explanations in our country are still at the conceptual level, and there has not really been a large-scale popular application in China. It has to be said that blockchain still maintains its relationship with the public. A certain distance. In this exclusive interview with Qin Yi, I believe it can help you have a better understanding of blockchain.Deep understanding.

Blockchain is disintermediation

Blockchain, many explanations are decentralization. Different from the general explanation. Qin Yi said: "It is not decentralization, but disintermediation."

Because the data is distributed in a distributed way, there is a strong security mechanism in it. Qin Yi said: "No matter which server is serving, the entire data storage is not easy to detect. But the most important thing is that because of the reliability of the data, we do not need an intermediary to prove who you are, but rely on A record that can be trusted by each other to facilitate the occurrence of any transaction in life.

In her opinion, the blockchain is actually a database, but when storing data, it has its own characteristics, security sex, integrity, authenticity, non-tamperability, etc.

For this technology, Qin Yi concluded: Such technology will bring about earth-shaking changes in life.

How to reflect commercial value?

Compared with foreign blockchain technology, domestic blockchain is still at a stage of widespread awareness. What kind of business will blockchain bring to us in the future? Value? Look at the progress abroad and maybe you can see some possibilities.

"Two weeks ago (that day was April 20), Bank of Ireland and Deloitte jointly issued a statement. Three months ago, Ireland ’s international investment banking department asked Deloitte to help design a way to track the investment behavior of his clients. Improve customer understanding. In order to meet European regulatory requirements, after three months of hard work, they have successfully completed the validated model. ”

A Deloitte executive also said that if this technology can be applied, it will greatly reduce industry transaction costs.

Deloitte also released a report in 2016, It is said that 2016 will be the first year for blockchain to move from the laboratory to real life. Bubi (Beijing) Network Technology Co., Ltd. (hereinafter referred to as: Bubi) is a leading domestic blockchain technology service provider and has been focusing on In the research and development and innovation of blockchain technology and products, it has a number of core technologies and has achieved substantial innovations in many aspects, forming a number of core technological achievements, such as: mathematically provable distributed consensus technology, rapid Large-scale ledger access technology, multi-chain general ledger technology that supports business expansion, interconnection technology between heterogeneous blockchains, etc. Developed its own basic blockchain service platform, which has been used in equity, supply chain, points, and credit Carry out applications in other fields. Bubi has been committed to building an open value circulation network with de-(multi-)center trust as the core, allowing digital assets to flow freely.

Blockchain technology has been used by many companies With the in-depth development, this change in the lives of ordinary people is becoming more and more obvious.

D. Who is setting the questions and adjusting the difficulty of the Bitcoin system? How was the first Bitcoin? Calculated

BTC is a virtual currency generated by open source P2P mobile software. It is an online virtual currency. Pitbull coins do not rely on the issuance of special currency institutions. They are generated through multiple calculations of special algorithms. The virtual currency economy uses a distributed system composed of many nodes in the entire P2P network to confirm and record every transaction. In fact, BTC has only entered the attention of investors in recent years. It can be said that when BTC first appeared, BTC was basically worthless, and an average of 1 US dollar could buy 1309.03 BTC. In 2011, the exchange rate between BTC and the U.S. dollar increased from 0.5 U.S. dollars to 13 U.S. dollars, an increase of 2,600%!

BTC is derived based on blockchain technology, and the composition of blockchain is ordinary code. We can understand it as a data file, which cannot be arbitrary. A folder that is destructible, cannot be forged, can be retrieved from the Internet, can be stored independently of the Internet, can be verified through the Internet for details, authenticity, and can be split at will.

E. How is the major of blockchain technology application_Employment direction_What are the main things to study

When filling in the application for the college entrance examination, I was confused. What is the major of blockchain technology application? What are the employment directions? Which and what to study mainly are issues that the majority of candidates and parents are very concerned about. The following is the relevant introduction, I hope it will be helpful to everyone.

1. Training objectives

This major cultivates comprehensive development of moral, intellectual, physical, artistic and labor skills, and masters a solid scientific and cultural foundation, programming and algorithms, Linux operating system, Knowledge of network technology, database, container technology, cryptography and related laws and regulations, etc., with capabilities such as blockchain application design and development, smart contract development, blockchain system testing, blockchain deployment and operation and maintenance, software design and development, etc. , high-quality technical and skilled talents with craftsman spirit and information literacy who can engage in blockchain application development, blockchain testing, blockchain operation and maintenance, blockchain operations, etc.

2. Employment direction

For occupations such as blockchain application operators, blockchain engineering and technical personnel, etc.

3. Main professional ability requirements

Have the ability to analyze and design demand for blockchain products;

Have the ability to apply blockchain and intelligence Ability to design and develop contracts;

Ability to test design, execution and analysis of blockchain systems;

Ability to deploy, maintain and monitor blockchain systems;

Have the ability to write and debug computer software front-end and back-end code;

Have the ability to write computer software requirements documents and design documents;

Possess digital skills and appropriateThe ability to respond to the new requirements of the development of the blockchain industry;

Have the ability to explore learning, lifelong learning and sustainable development.

4. Main professional courses and practical training

Basic professional courses: basics of blockchain, Linux operating system, computer network basics, programming basics, Web development technology, Database technology and applications.

Professional core courses: advanced application of programming, core blockchain technology, virtualization and container technology, blockchain deployment and operation and maintenance, blockchain application design and development, smart contract development, district Comprehensive practice of blockchain projects.

Internship training: Connect with real professional scenarios or work situations, conduct blockchain application design and development, smart contract development, blockchain deployment and operation and maintenance, and comprehensive practice of blockchain projects inside and outside the school Waiting for practical training. Conduct on-the-job internships in blockchain-related companies and other units or places.

5. Examples of professional certificates

Professional qualification certificate: Computer technology and software professional technical qualification

Professional skill level certificate: Blockchain system Application and design, blockchain application software development and operation and maintenance, blockchain smart contract development

6. Examples of continuing majors

Examples of continuing higher vocational undergraduate majors: Blockchain Chain technology, software engineering technology, cloud computing technology, information security and management

Examples from ordinary undergraduate majors: blockchain engineering, cryptography science and technology, information security, computer science and technology, cyberspace security

F. Is there a blockchain test in this year’s college entrance examination?

You can search many chains and there are open source codes. Read them piece by piece to understand. See if you can understand it, I don’t really understand it anyway