Quiz

Question 1

Which of the following are included in the header of a Proof of Stake block?

Solution

• Previous block hash

• Timestamp

• Transaction root

Question 2

Which of the following attacks requires the attacker to have stake on a Proof of Stake blockchain?

Solution

• XX% attack

• Long-range attack

Question 3

Which of the following are reasons that a divergent blockchain can be created in a Proof of Work blockchain?

Solution

• Statistical probability

• A 51% attack

Question 4

Which of the following algorithms uses parts of a computer as its scarce resource?

Solution

• Proof of Space

• Proof of Work