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Blockchain MCQs

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

What is Blockchain?

a)

Centralized database

b)

Distributed ledger technology

c)

Programming language

d)

Operating system

2.

Which feature ensures data cannot be altered in Blockchain?

a)

Transparency

b)

Immutability

c)

Scalability

d)

Latency

3.

Who introduced Bitcoin?

a)

Vitalik Buterin

b)

Elon Musk

c)

Satoshi Nakamoto

d)

Mark Zuckerberg

4.

What is a block in Blockchain?

a)

A type of virus

b)

A group of transactions

c)

A programming code

d)

A hardware device

5.

Which consensus algorithm is used in Bitcoin?

a)

Proof of Stake

b)

Proof of Authority

c)

Proof of Work

d)

Delegated Proof of Stake

6.

What links blocks together in a Blockchain?

a)

IP address

b)

Hash value

c)

Digital signature

d)

Timestamp

7.

Which of the following is a public Blockchain?

a)

Hyperledger

b)

Ripple

c)

Ethereum

d)

Corda

8.

What is a smart contract?

a)

Legal document

b)

Self-executing program

c)

Database table

d)

Encryption key

9.

Which cryptographic technique is used in Blockchain?

a)

Symmetric encryption

b)

Hashing

c)

Steganography

d)

Compression

10.

What is mining in Blockchain?

a)

Creating smart contracts

b)

Adding new blocks to the chain

c)

Deleting transactions

d)

Encrypting data