Question 1

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 2

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 3

Which of these desired outcomes is best obtained through a Blockchain solution?

Options :

A : Pending financial transactions need to be stored until completed and then should be deleted

B : A website that shows current data from various stock markets

C : A mobile app that displays information about today-s weather

D : None of the above

Answer: B

Question 4

Select the two kinds of accounts in Ethereum which share the same address space. (Select two.)

Options :

A : Gas Account

B : Contract Accounts

C : External Accounts

D : Internal Accounts

E : dApp Accounts

Answer: B,C

Question 5

What is the accepted best practice for preventing contract addresses from changing when a new contract is released?

Options :

A : Move your contract to a new blockchain

B : Delete the old contract and add the new version in its place

C : Addresses always change so use a calling contract

D : Use the ''- -addressForce'' parameter when releasing a new contract

Answer: D