Class 11 Computer Science · Chapter 6 · Test 2
Blockchain Technology
38 MCQs Covers blockchain principles (decentralization, immutability, consensus), components (node, ledger, block, transaction, protocol) and P2P networks.
38 questions · 30 min · 38 marks
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Sample questions
The first 5 of 38. Try each one, then tap to see the answer.
Question 1
Which technology is the foundation of cryptocurrencies like Bitcoin?
- ACloud Computing
- BBlockchain
- C5G
- DIoT
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Answer: B
Bitcoin works on blockchain.
Question 2
Which is a key principle of blockchain?
- ACentralization
- BSlow processing
- CSingle point of failure
- DImmutability
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Answer: D
Recorded data cannot be changed.
Question 3
A block in blockchain is:
- AA group of transactions
- BA single computer
- CA type of contract
- DAn email
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Answer: A
Each block has a hash, parent hash and transactions.
Question 4
Consensus mechanisms in blockchain are used to:
- ASend emails
- BIncrease internet speed
- CAgree on the validity of transactions
- DPrint documents
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Answer: C
Nodes agree before a block is added.
Question 5
A smart contract is:
- AA paper contract
- BAn automated agreement written in code
- CA cloud service
- DA type of software update
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Answer: B
It runs when conditions are met.
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