What is block reward?

a$.$

an approval

b$.$

an incentive

c$.$

a permission

d$.$

a penalty

Question $2$

Not yet answered

Marked out of $1\mathrm{.}00$

Not flaggedFlag question

Question text

What is the good Gas limit for Ethereum?

a$.$

$48000$ units

b$.$

$12000$ units

c$.$

$21000$ units

d$.$

$22000$ units

Question $3$

Not yet answered

Marked out of $1\mathrm{.}00$

Not flaggedFlag question

Question text

What is the type of Consensus in blockchain?

a$.$

Proof of Work$($PoW$)$

b$.$

Proof of Agreement$($PoA$)$

c$.$

Proof of Truth$($PoT$)$

d$.$

Proof of Evidence$($PoE$)$

Question $4$

Not yet answered

Marked out of $1\mathrm{.}00$

Not flaggedFlag question

Question text

Blockchain works on

a$.$

distributed approach

b$.$

centralised approach

c$.$

third party approach

d$.$

file based approach

Question $5$

Not yet answered

Marked out of $1\mathrm{.}00$

Not flaggedFlag question

Question text

What are blockchain transactions?

a$.$

transfer of bits

b$.$

transfer of text

c$.$

transfer of nodes

d$.$

data transmission across a network

Question $6$

Not yet answered

Marked out of $1\mathrm{.}00$

Not flaggedFlag question

Question text

Blockchain uses

a$.$

public key

b$.$

only key

c$.$

hybrid key

d$.$

keyless work

Question $7$

Not yet answered

Marked out of $1\mathrm{.}00$

Not flaggedFlag question

Question text

Which Blockchain supports Blockchain$-$as$-$a$-$Service$($BaaS$)?$

a$.$

Ethereum

b$.$

Public

c$.$

Private

d$.$

Permissioned

Question $8$

Not yet answered

Marked out of $1\mathrm{.}00$

Not flaggedFlag question

Question text

What is Merkel Tree?

a$.$

a software

b$.$

a data structure

c$.$

a hardware

d$.$

a chatbot

Question $9$

Not yet answered

Marked out of $1\mathrm{.}00$

Not flaggedFlag question

Question text

Bitcoin is

a$.$

hybrid blockchain

b$.$

private blockchain

c$.$

public blockchain

d$.$

consortium

Question $10$

Not yet answered

Marked out of $1\mathrm{.}00$

Not flaggedFlag question

Question text

How many types of Blockchain network are there?

a$.$

$6$

b$.$

$4$

c$.$

$3$

d$.$

$5$

Question $11$

Not yet answered

Marked out of $2\mathrm{.}00$

Not flaggedFlag question

Question text

In blockchain which tree stores all the transactions in a block by producing a digital fingerprint of the entire set of transactions?

a$.$

Merkle

b$.$

Binary

c$.$

AVL

d$.$

Red Black

Question $12$

Not yet answered

Marked out of $2\mathrm{.}00$

Not flaggedFlag question

Question text

In which type of consensus algorithm, validators invest in the coins of the system by locking up some of their coins as stakes?

a$.$

PoW

b$.$

PoS

c$.$

PoB

d$.$

DPoS

Question $13$

Not yet answered

Marked out of $2\mathrm{.}00$

Not flaggedFlag question

Question text

What are the different types of Tokens?

a$.$

platform

b$.$

data

c$.$

rupee

d$.$

bits

Question $14$

Not yet answered

Marked out of $2\mathrm{.}00$

Not flaggedFlag question

Question text

What is one of the reasons to consider implementing a blockchain solution?

a$.$

ability to work on different versions of the same data

b$.$

inability to trace and access data of other users

c$.$

ability to verify that data has not been tampered with since its creation

d$.$

inability to track simultaneous updates by multiple users

Question $15$

Not yet answered

Marked out of $4\mathrm{.}00$

Not flaggedFlag question

Question text

The transaction Merkle Tree root value in a Bitcoin block is calculated using $\_$

a$.$

Hash of transactions

b$.$

Previous block's hash

c$.$

Number of transactions

d$.$

number of nodes

Question $16$

Not yet answered

Marked out of $4\mathrm{.}00$

Not flaggedFlag question

Question text

Who invented Merkle Trees?

a$.$

Ralph Wiggum

b$.$

Vitalik Buterin

c$.$

Ralph Merkle

d$.$

Satoshi

Question $17$

Not yet answered

Marked out of $4\mathrm{.}00$

Not flaggedFlag question

Question text

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?

a$.$

The attacker changed the transaction on his node and propagated it in the network.

b$.$

gained control of more than $51\%$ power

c$.$

edited smart contract and recovered cryptocurrency

d$.$

The attacker hard$-$forked the network and created a new blockchain network