Spread knowledge and earn SBD with the Crypto quiz on: blockchain consensus algorithms

Today, the crypto quiz will be about blockchain consensus algorithms. Before you start answering the questions make sure that you have read the rules and the rewards section here. Now, let's go to the questions:

❔ What is the type of consensus mecchanism that bitcoin uses?

 
a) proof of stake
b) proof of work
c) proof of elapsed time

❔ In proof os stake, how validators are paid?

 
a) by new coins created in the validation of the block
b) by transaction fees
c) by some offer made by a volunteer

❔ write 3 consensus algorithms that you know that is different from proof of work and proof of stake