CBBF

CBBF practice questions, page 3 of 4, with answer review and explanations.

Question 11

Blockchains work best when they are____________________.

  1. combined with other technologies
  2. used for financial applications
  3. used alone
  4. used as an alternative to a database

Question 12

What is a hash function?

  1. A one-way function that converts input to a unique string output
  2. A function that stores data behind a key
  3. A two-way function used for condensing information
  4. The block-ID of the block
  5. All the above

Question 13

Blockchains are being implemented in the food supply chain because_____________.

  1. consumers demand to know where their food comes from
  2. it allows farm to table accountability for safety
  3. they have the potential to provide fast, specific supplier data
  4. it prevents food waste if a food contamination problem occurs
  5. All of the above

Question 14

Which of the following are practical use cases for Blockchain?

  1. Voting
  2. A video sharing website
  3. Medical records
  4. Identity management
  5. All of the above

Question 15

Which item(s) make up a block header?

  1. The hash of the Merkle root and the header of the previous block
  2. The hash of every transaction in a specific block and the next block
  3. The time stamp of the block and the genesis block hash
  4. The hash of the previous block