Distributed Systems

Question 1

What is the CAP theorem?

Answer 1

The CAP theorem states that any distributed data store can only provide two of the following three guarantees:

• Consistency
  Every read receives the most recent write or an error.
• Availability
  Every request receives a (non-error) response, without the guarantee that it contains the most recent write.

-Partition tolerance
The system continues to operate despite an arbitrary number of messages being dropped (or delayed) by the network between nodes.