CBSA

CBSA practice questions, page 2 of 9, with answer review and explanations.

Question 6

A ____________cipher basically means it is using a fixed key which replaces the message with a pseudorandom string of characters. It is basically the encryption of each letter one at a time. What is the cipher type?

  1. Stream
  2. Block
  3. Parallel
  4. RSA

Question 7

You currently using the Metamask Chrome plugin and you see a selection for Etherescan in the plugin. What is Etherscan used for?

  1. A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum Blockchain
  2. A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Bitcoin Blockchain
  3. A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum and Tokens Blockchain
  4. A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on any Blockchain

Question 8

What are two challenges with using a Proof of Work algorithm? (Select two.)

  1. Mining pools not allowed
  2. Difficulty rate goes done every year.
  3. Expensive
  4. Power Intensive

Question 9

Your customer is an enterprise that is focused on financial sectors. What type of blockchain would this customer likely want specified for their enterprise?

  1. Permissionless
  2. Decentralized
  3. Hybrid
  4. Permissioned

Question 10

Which is the following is the metaphor that describes a logical dilemma that plagues many computer networks?

  1. Neo Generals' problem
  2. Byzantine Generals' problem
  3. Byzantine Admirals' problem
  4. Renaissance Generals' problem