Questionmark Perception
Feb 19 2020 |
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Introduction

Introduction

This is the EXIN Blockchain Foundation (BLOCKCHAINF.EN) sample exam. The Rules and Regulations for EXIN’s examinations apply to this exam.

This exam consists of 40 multiple-choice questions. Each multiple-choice question has a number of possible answers, of which only one is correct.

The maximum number of points that can be obtained for this exam is 40. Each correct answer is worth 1 point. You need 26 points or more to pass the exam.

The time allowed for this exam is 60 minutes.

Good luck!





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Question

1  of 40
What is an advantage of a public blockchain?

Question

2  of 40
What is a blockchain?

Question

3  of 40
What is the function of a lightweight node within a blockchain network?

Question

4  of 40
What is not a classification for a node?

Question

5  of 40
A bearer instrument used to transfer value between two parties over a blockchain network.

What is this instrument?

Question

6  of 40
What is a key characteristic of a public blockchain?

Question

7  of 40
What is an example of the use of cryptography in a blockchain?

Question

8  of 40
How do blockchains use private and public-key cryptography?

Question

9  of 40
How do hybrid blockchain networks combat 51% attacks?

Question

10  of 40
How do blockchains function like ledgers?

Question

11  of 40
What is the task of miners in a blockchain network?

Question

12  of 40
Which description fits only the Proof of Work (PoW) consensus algorithm?

Question

13  of 40
A competitive consensus algorithm that was developed because blockchains had difficulty meeting the transaction speed demands.

Which consensus algorithm is this?

Question

14  of 40
Which consensus algorithm is the least energy efficient?

Question

15  of 40
What is an advantage of using the consensus algorithm Proof of Elapsed Time (PoET) instead of Proof of Work (PoW)?

Question

16  of 40
An attacker tries to corrupt the transaction history of a blockchain to be able to spend a token or a cryptocurrency twice.

What is the most likely thing this attacker did?

Question

17  of 40
Blockchain networks are vulnerable to 51% attacks.

Which network would incentivize hackers most to break the network?

Question

18  of 40
One of the greatest threats to the blockchain community is the narcissism of small differences.

What is the result of this narcissism of small differences?

Question

19  of 40
How do fraudsters use a Ponzi scheme?

Question

20  of 40
Which characteristic of a blockchain network is also its protection?

Question

21  of 40
How can information be secured in a blockchain?

Question

22  of 40
In what way do blockchains use a public witness?

Question

23  of 40
Blockchain enables self-sovereign identity.

How does blockchain do this?

Question

24  of 40
Public blockchains give an incentive to encourage users to mine blocks and secure the network.

What incentive is this?

Question

25  of 40
An organization wants to develop smart contracts, based on blockchain technology. The organization does not wish to burden employees with maintaining the security of the blockchain.

What blockchain technology fits the organization best?

Question

26  of 40
What is a key characteristic of the Hyperledger network?

Question

27  of 40
What is the best use case for smart contracts?

Question

28  of 40
In which scenario is a smart contract the best solution to the problem?

Question

29  of 40
What are DApps designed to do?

Question

30  of 40
What is the role of a DAO (decentralized autonomous organization)?

Question

31  of 40
How can blockchain technology best help securing identity data?

Question

32  of 40
What is the value of using blockchain networks with Internet of Things (IoT)?

Question

33  of 40
Blockchain technology has made decentralized marketplaces possible.

What is a benefit of a decentralized marketplace?

Question

34  of 40
How does blockchain improve supply chains?

Question

35  of 40
The Monetary Authority of Singapore (MAS) and blockchain company R3 partnered together.

What did they achieve together?

Question

36  of 40
What is digital fiat currency?

Question

37  of 40
How does blockchain technology benefit the insurance industry?

Question

38  of 40
How does blockchain technology help to protect intellectual property rights (IP)?

Question

39  of 40
What is an example of how a government is actively promoting the use of blockchain?

Question

40  of 40
Why is blockchain described as the technology that adds a layer of trust to the internet?