CAP Theorem Quiz

Q1. What does “CAP” stand for in the context of the CAP theorem? Consistency, Availability, Performance
Consistency, Accuracy, Partition tolerance
Consistency, Availability, Partition tolerance
Capacity, Availability, Performance

Q2. True/False: The CAP theorem states that a distributed system can simultaneously provide consistency, availability, and partition tolerance. True
False

Q3. In the context of the CAP theorem, what does “consistency” mean? Every read receives the most recent write (or an error if the latest data can't be guaranteed)
The system is operational 24/7 with minimal downtime
The system continues to operate despite any number of network failures
All database transactions preserve integrity and constraints

Q4. True/False: Partition tolerance in CAP means the system continues to function even if network communications between nodes are disrupted. True
False

Q5. True/False: If no network partition occurs, a distributed system can potentially provide both consistency and availability simultaneously. True
False

Q6. Which of the following systems is an example of a CP system (consistent and partition-tolerant)? Apache Cassandra
Apache Zookeeper
Amazon DynamoDB
CouchDB

Q7. Which statement about CAP theorem trade-offs is true? In an AP system, the system may return stale (out-of-date) data to ensure availability during a network partition.
In a CP system, the system favors availability over consistency when a partition occurs.
“Partition tolerance” means the system stops functioning when network partitions happen.
CAP theorem applies only to NoSQL databases, not to relational databases.

Q8. True/False: The term “Consistency” in CAP has the same meaning as the “Consistency” in ACID database transactions. True
False

Q9. Which theorem or concept extends CAP by considering the trade-off between latency and consistency (when no partition occurs)? Brewer’s theorem
ACID
BASE
PACELC

Q10. True/False: Systems that prioritize availability (AP systems) often use eventual consistency, meaning all replicas will eventually synchronize to the same data once a network partition is resolved. True
False

system-design