NIELIT Scientist B 2020 November: 50

Question

In __________, other nodes verify the validity of the block by checking that the hash of the data of the block is less than a present number.

• A. Proof of Burn
• B. Proof of STAKE
• C. Proof of Work
• D. All of the options

Answer 1

option C is the answer.

 

REFERENCE:- https://medium.com/loom-network/understanding-blockchain-fundamentals-part-2-proof-of-work-proof-of-stake-b6ae907c7edb#:~:text=In%20Proof%20of%20Work%2C%20other,also%20incentivized%20not%20to%20cheat.

Answer 2

C.  Proof of Work …

 

Proof of work (PoW) is a form of cryptographic zero-knowledge proof in which one party (the prover) proves to others (the verifiers) that a certain amount of computational effort has been expended for some purpose….

There are two classes of proof-of-work protocols :

1. Challenge–response...

2. Solution–verification...

In Proof of Work, other nodes verify the validity of the block by checking that the hash of the data of the block is less than a preset number….