This section focuses on "Basics" of Blockchain. These Multiple Choice Questions (MCQ) should be practiced to improve the Blockchain skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.
1.A blockchain is a type of?
A. Object
B. Database
C. Table
D. View
View Answer
2.Blockchains store data inthe form of?
A. line
B. circle
C. block
D. rhombus
View Answer
3.In Bitcoin case, blockchain is used in a __________way.
A. decentralized
B. centralized
C. Both A and B
D. None of the above
View Answer
4.Decentralized blockchains are immutable?
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
5.A blockchain, originally block chain, is a growing list of records, called blocks, that are linked using?
A. Timestamp
B. hash
C. Merkle tree
D. Cryptography
View Answer
6.Who first proposed a blockchain-like protocol?
A. Stuart Haber
B. W. Scott Stornetta
C. David Chaum
D. Dave Bayer
View Answer
7.The first blockchain was conceptualized by a person (or group of people) known asSatoshi Nakamotoin?
A. 2005
B. 2008
C. 2006
D. 2004
View Answer
8.Which of the following statement is true about blockchain?
A. A blockchain is adecentralized,distributed, and oftentimes public, digital ledger consisting of records calledblocks
B. A blockchain database is managed autonomously using apeer-to-peernetwork and a distributed timestamping server
C. A blockchain has been described as avalue-exchange protocol.
D. All of the above
View Answer
9.Blocks hold batches of valid transactions that are hashed and encoded into a?
A. merkle tree
B. cryptographic hash
C. genesis block
D. temporaryfork
View Answer
10.Theblock timeis the average time it takes for the network to generate one extra block in the blockchain.
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Discussion
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