Examination – Blockchain

Question 1

What is Blockchain?

A type of database

A distributed and decentralized digital ledger

A programming language

A cloud storage system

Question 2

Which of the following is the first blockchain-based cryptocurrency?

Ethereum

Litecoin

Bitcoin

Ripple

Question 3

Who invented Bitcoin?

Vitalik Buterin

Satoshi Nakamoto

Elon Musk

Steve Jobs

Question 4

What is a block in blockchain?

A virus

A single computer

A collection of transactions

A software bug

Question 5

Which feature ensures that blockchain data cannot be easily changed?

Centralization

Immutability

Virtualization

Compression

Question 6

What does mining mean in blockchain?

Buying cryptocurrency

Hacking the network

Verifying and adding transactions to the blockchain

Creating websites

Question 7

Which consensus mechanism is used by Bitcoin?

Proof of Stake (PoS)

Proof of Work (PoW)

Delegated Proof of Stake (DPoS)

Proof of Authority (PoA)

Question 8

What is a smart contract?

A legal document

A manually controlled program

Self-executing code on the blockchain

A bank agreement

Question 9

Which blockchain platform is widely used for smart contracts and DApps?

Bitcoin

Dogecoin

Ethereum

Tron

Question 10

Which of the following is a key advantage of blockchain?

High central control

Low transparency

Enhanced security and trust

Data duplication

Online Examination – Blockchain