Blockchain Developer Test 6

Question 1

What are the applications of Smart Contract

Accepted Answer

All of the above

Answer

Transportations

Answer

Insurance

Answer

Protecting Copyrighted Content

Question 2

What is the meaning of EVM

Accepted Answer

Ethereum Virtual Machine

Answer

Ethereum Valuable Memory

Answer

Ethereum Virtual Memory

Answer

Ethereum Valuable Machine

Question 3

The scenario where one digital token is spent multiple times because the token generally consists of a digital file that can easily be cloned is known as

Accepted Answer

Double-spending

Answer

Single-spending

Answer

Multiple-spending

Answer

None of the above

Question 4

It is the situation where malicious miners/ attackers are present in the majority of a blockchain network

Accepted Answer

51% attack

Answer

50% attack

Answer

49% attack

Answer

55% attack

Question 5

_______ transactions are the transactions occurring on the cryptocurrency network that moves value outside the network

Accepted Answer

Off-chain

Answer

Bad-chain

Answer

Remote-chain

Answer

None of these

Question 6

A Coinbase transaction is the _______ in a block. It is a unique type of bitcoin transaction that can be created by a miner.

Accepted Answer

First Transaction

Answer

Second Transaction

Answer

Third Transaction

Answer

None of these

Question 7

Kind of attack which miner mines a block with his transaction and does not release it in the system

Accepted Answer

Finney Attack

Answer

Race Attack

Answer

The 51% Attack

Answer

None of these

Question 8

The attacker may send the same coin to different vendors in rapid succession, probably by using two machines

Accepted Answer

Race Attack

Answer

Finney Attack

Answer

The 51% Attack

Answer

None of these

Question 9

The attacker mines a private blockchain where he double-spends the coins.

Accepted Answer

The 51% Attack

Answer

Race Attack

Answer

Finney Attack

Answer

None of these

Question 10

Which of the following is a type of Blockchain?

Accepted Answer

Private Blockchain

Answer

Inside Blockchain

Answer

Ethereum