Blockchain JavaScript Developer set 4

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Free Online Best Blockchain JavaScript MCQ Questions for improve your basic knowledge of Blockchain JavaScript Developer. This Blockchain JavaScript Developer set 4 test that contains 25 Multiple Choice Questions with 4 options. You have to select the right answer to a question.

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Question 1

What is Decryption?

A	Decryption is a process of converting your message into code so that only authorized parties can access it.
B	Decryption is reversing the encryption process so that the message can be converted to the original message
C	Decryption is using the techniques of encryption and decryption to send and receive messages.
D	Decryption is using cryptography the same way as the earlier SSL or video example but specifically to fit the needs of a digital asset.

Question 2

What is Blockchain?

A	Blockchain is used to verify the transaction in the quickest time and less space complexity
B	Blockchain is a cryptocurrency
C	Blockchain is a record book
D	Blockchain is a technology behind cryptocurrency and just one case of technology

Question 3

What is a ledger?

A	ledger is typically a database or a record book
B	ledger works on the principle of ECCDLP
C	ledger provides equivalent security for a much lesser key size which makes ECC faster and more secure
D	ledgeris a cryptocurrency

Question 4

Which one of the following is known as the Equality operator, which is used to check whether the two values are equal or not?

A	.=
B	.===
C	.==
D	&&

Question 5

What is Proof of Work?

A	POW is the first and most popular mechanism used by bitcoin and Ethereum, which are the most popular cryptocurrencies at the time of writing
B	POW attack happens when multiple systems are attacking a target’s system resource/bandwidth.
C	POW provides a similar hashing block scheme to bitcoin’s PoW, but it limits the number of peers
D	POW is a slang term coined in association with cryptocurrency to describe holding cryptocurrency disregarding price fluctuation.

Question 6

Which one of the following is not a keyword?

A	if
B	with
C	debugger
D	use strict

Question 7

What does P2P stands for?

A	Password to Password
B	Peer to Peer
C	product to product
D	Private Key to Public Key

Question 8

What we will get if we compare the "one" with "8" using the less than operator ("one"<8)?

A	FALSE
B	TRUE
C	NaN
D	Undefined

Question 9

Which one of the following operator is used to check weather a specific property exists or not:?

A	Exists
B	exist
C	within
D	in

Question 10

What is Cold storage?

A	Cold storage is a place to hang your coat
B	Cold storage is a private key not connected to internet
C	Cold storage is a private key connected to internet
D	Cold storage is a desktop Wallet

Question 11

What are the three important manipulations for a loop on a loop variable?

A	Initialization, Testing, Updation
B	Updation, Incrementation, Initialization
C	Initialization, Testing, Incrementation
D	Testing, Updation, Testing

Question 12

What is distributed denial-of-service?

A	Distributed denial-of-service attack happens when multiple systems are attacking a target’s system resource/bandwidth.
B	Distributed denial-of-service is the first and most popular mechanism used by bitcoin and Ethereum, which are the most popular cryptocurrencies at the time of writing
C	Distributed denial-of-service is a slang term coined in association with cryptocurrency to describe holding cryptocurrency disregarding price fluctuation.
D	Distributed denial-of-service provides a similar hashing block scheme to bitcoin’s PoW, but it limits the number of peers

Question 13

Cryptocurrency wallet used to______________

A	stores one or multiple public key and private key combinations and is used to receive or spend cryptocurrency
B	verify and add transactions to the blockchain digital ledger.
C	distributed ledger, which has a shared database based on consensus algorithm
D	All of these

Question 14

What is Encryption?

A	Encryption is a process of converting your message into code so that only authorized parties can access it.
B	Encryption is reversing the encryption process so that the message can be converted to the original message
C	Encryption is using the techniques of encryption and decryption to send and receive messages.
D	Encryption is using cryptography the same way as the earlier SSL or video example but specifically to fit the needs of a digital asset.

Question 15

How many different types of Blockchains are there?

A	2
B	3
C	4
D	5

Question 16

Which one of the following is the correct output for the given JavaScript code? const object1 = { property1:20 }; console.log(Object.is(object1));

A	FALSE
B	TRUE
C	20
D	Undefined

Question 17

Which of these facts about a ledger is not correct?

A	A ledger is used purely for the reporting of cash
B	A ledger consists of transactions, often governed by contracts
C	A ledger is a system of record
D	A ledger describes the inputs and outputs of a business.

Question 18

Which of the following is asymmetric encryption Algorithm?

A	Blowfish
B	Twofish
C	RSA
D	Triple DEA

Question 19

What is the core requirement(s) for a business BlockChain?

A	Shared ledger, smart contract, privacy, and trust
B	Optimized cryptographic mining
C	A new cryptocurrency
D	Technical services, business services, and solution

Question 20

What makes a good Blockchain use case?

A	An identifiable business network
B	A business problem to be solved
C	The need for trust
D	All of these

Question 21

Define BlockChain in the simplest words?

A	BlockChain is a distributed ledger, which has a shared database based on consensus algorithm
B	BlockChain is a ledger describes the inputs and outputs of a business.
C	BlockChain is a typically a database or a record book
D	BlockChain is a Technical services, business services, and solution

Question 22

Which one of the following is not considered as a "statement" in JavaScript?

A	use strict
B	debugger
C	if
D	with

Question 23

What is Cryptocurrency?

A	Cryptocurrency is a process of converting your message into code so that only authorized parties can access it.
B	Cryptocurrency is reversing the encryption process so that the message can be converted to the original message
C	Cryptocurrency is using the techniques of encryption and decryption to send and receive messages.
D	Cryptocurrency is a digital asset designed so that electronic cash is able to be exchanged using strong cryptography

Question 24

What is Cryptography?

A	Cryptography is a process of converting your message into code so that only authorized parties can access it.
B	Cryptography is reversing the encryption process so that the message can be converted to the original message
C	Cryptography is using the techniques of encryption and decryption to send and receive messages.
D	Cryptography is using cryptography the same way as the earlier SSL or video example but specifically to fit the needs of a digital asset.

Question 25

What is a Merkle Tree?

A	Merkle Tree is used to verify the transaction in the quickest time and less space complexity
B	Merkle Tree is a cryptocurrency
C	Merkle Tree is a record book
D	Merkle Tree is a technology behind cryptocurrency and just one case of technology

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