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Question 1

In the Proof of Stake(POS) algorithm the miners are really known as ___________?

Options :

A : Notary

B : Oracle

C : Forgers

D : Minters

Answer: C

Question 2

Which one of the following is true regarding Smart Contracts on the Ethereum blockchain?

Options :

A :

They provide added security over off-chain transaction code on other blockchain networks

B :

Because they are compiled into bytecode they cannot be used in an unintended manner

C : Any flaw discovered in their code can quickly be updated and redeployed

D : They are Turing complete and deterministic in nature

Answer: D

Question 3

Secure Hash Algorithm (SHA-256) output is always 256 bits or 32 bytes in length regardless of the length of the input (even if input is millions of bytes). Select best answer.

Options :

A : NSA is spying on us so what-s it matters.

B : Depends on input

C : False

D : True

Answer: D

Question 4

You are currently considering blockchain solutions for your organization. You read an article about 'blockless' blockchains.
What are the two benefits that could be gained over a traditional blockchain solution? (Select two.)

Options :

A : Faster Block writes

B : Greater Transaction Security

C : Faster Performance

D : Greater transaction Capacity

Answer: A,B

Question 5

What is the language that Solidity is using to build on the Ethereum Virtual Machines(EVM)?

Options :

A : .Net

B : Javascript

C : C++

D : Node.js

E : PHP

Answer: B