Blockchain Developer Test 4

Question 1

Which of the above commands is used to establish a connection to an existing Blockchain?

Accepted Answer

multichaind <name_of_multichain>@[ip-address]:[port]

Answer

multichaind stockexchange [ip-address]:[-port]

Answer

multichaind stockexchange@[ip-address:port]

Answer

multichain stockexchange@[ip-address]:[port]

Question 2

Which of the following is present in each block of a blockchain?

Accepted Answer

All of the above

Answer

Transactions list

Answer

A pointer to the preceding block's hash

Answer

Timestamp

Question 3

The first distributed blockchain implementation is which of the following?

Accepted Answer

Bitcoin

Answer

Ethereum

Answer

Ledger

Answer

All of the above

Question 4

Bitcoin is based on what blockchain?

Accepted Answer

Public

Answer

Private

Answer

Private Permissioned

Answer

Coded

Question 5

Which of the following can be used to store a blockchain?

Accepted Answer

Both options are correct

Answer

A Database

Answer

A flat file

Answer

None of the options are correct

Question 6

The main advantage of immutability is _______.

Accepted Answer

Increased Efficiency

Answer

Tamper Proof

Answer

Accountability

Answer

Security settings is more reliable.

Question 7

Which of the following cryptographic algorithms is used to generate the hash that uniquely identifies each block in the Blockchain?

Accepted Answer

SHA256

Answer

SHA128

Answer

SHA129

Question 8

In the blockchain, a block can only have one parent block at a time.

Accepted Answer

True

Answer

False

Answer

Sometimes

Question 9

Which of the following can happen as a result of a blockchain fork?

Accepted Answer

Multiple children blocks

Answer

Multiple hacks

Answer

Multiple parent blocks

Answer

All of the above

Question 10

Which of the following can happen as a result of a blockchain fork?

Accepted Answer

RSA

Answer

Tripple DEA

Answer

Blowfish

Answer

Twofish