WorksheetsBlockchain Quiz
Total questions: 10
Worksheet time: 2mins
Name
Class
Date
1.
What is the key function of a blockchain's consensus mechanism?
a)
a. Data encryption
b)
b. Transaction validation
c)
c. User authentication
d)
d. File storage
2.
Which cryptographic technique is commonly used to secure transactions on a blockchain?
a)
a. RSA
b)
b. SHA-256
c)
c. AES
d)
d. MD5
3.
What is a smart contract in the context of blockchain?
a)
a. A legal document
b)
b. A self-executing code
c)
c. A user authentication protocol
d)
d. A data storage mechanism
4.
In a public blockchain, who can participate in the consensus process?
a)
a. Only miners
b)
b. Any participant
c)
c. Only government entities
d)
d. Verified businesses
5.
What is the purpose of a nonce in a blockchain system?
a)
a. Transaction timestamp
b)
b. Random data
c)
c. Security key
d)
d. Unique identifier
6.
Which blockchain feature ensures that once data is added, it cannot be altered or deleted?
a)
a. Immutability
b)
b. Flexibility
c)
c. Scalability
d)
d. Anonymity
7.
What is a "fork" in the context of blockchain technology?
a)
a. A hardware component
b)
b. A software bug
c)
c. A protocol upgrade
d)
d. A data breach
8.
What role do nodes play in a decentralized blockchain network?
a)
a. Transaction validation
b)
b. Data encryption
c)
c. User authentication
d)
d. File storage
9.
Which consensus algorithm is known for its energy-efficient approach in blockchain networks?
a)
a. Proof of Work (PoW)
b)
b. Proof of Stake (PoS)
c)
c. Delegated Proof of Stake (DPoS)
d)
d. Byzantine Fault Tolerance (BFT)
10.
What is the purpose of a private key in blockchain cryptography?
a)
a. Transaction approval
b)
b. Public ledger access
c)
c. Identity verification
d)
d. Smart contract execution
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