Quiz

Question 1

Which stage of the block creation process can occur at different times based upon the implementation of the blockchain?

Solution

• Block creator selection

The Block Creator Selection step can move around in the block creator process depending on the consensus algorithm used. For example, Proof of Stake selects the block creator before a block is built, while in Proof of Work, the block creator is selected based upon who can build a valid block the fastest.

Question 2

Which of the following attacks would only work against a Proof of Work blockchain?

Solution

• Selfish mining

• SPV mining

Question 3

Which of the following attacks is primarily designed as a means for performing other attacks?

Solution

Sybil attacks

Question 4

Which of the following enable theft of private keys?

Solution

• Blockchain software misconfiguration

• Malware