CCA Transactions & Verification

Question 1

What does a blockchain transaction include?

Accepted Answer

Digital signature and transaction details

Answer

Username and password

Answer

Social Security number

Answer

Email and phone number

Question 2

How is a transaction verified on the blockchain?

Accepted Answer

Through consensus among network nodes

Answer

By scanning QR codes

Answer

Using AI algorithms

Answer

By local storage

Question 3

What is a hash in blockchain?

Accepted Answer

A cryptographic summary of data

Answer

Encrypted email

Answer

A user password

Answer

Network firewall

Question 4

What prevents double-spending in blockchain?

Accepted Answer

Consensus protocol validation

Answer

Bank approval

Answer

Two-step authentication

Answer

Manual auditing

Question 5

What is the role of a miner in transaction verification?

Accepted Answer

They validate and add transactions to the ledger

Answer

They encrypt private keys

Answer

They store user passwords

Answer

They issue new cryptocurrencies

Question 6

Why is immutability important in transaction verification?

Accepted Answer

To ensure trust and prevent tampering

Answer

To enable refunds

Answer

To increase storage capacity

Answer

To allow user edits