API API Performance Testing

Question 1

Which tool is most commonly used for API load and performance testing?

Accepted Answer

JMeter

Answer

Apache JMeter is the most widely adopted open-source tool for load testing APIs by simulating concurrent users.

Question 2

What is the goal of load testing an API?

Accepted Answer

Evaluate API behavior under expected peak traffic

Answer

Load testing simulates expected production traffic levels to ensure the API meets performance requirements under real-world conditions.

Question 3

What does 'throughput' measure in API performance testing?

Accepted Answer

Number of requests processed per unit of time

Answer

Throughput measures how many API requests a system can successfully handle per second or minute, indicating capacity.

Question 4

What type of performance test pushes the API beyond its capacity to find the breaking point?

Accepted Answer

Stress test

Answer

Stress testing deliberately overloads the API beyond its designed capacity to identify failure modes and recovery behavior.

Question 5

What is a 'soak test' (endurance test) in API performance testing?

Accepted Answer

A test that runs at normal load for an extended period to detect memory leaks

Answer

Soak testing (endurance testing) runs the API at sustained normal load for hours or days to detect degradation, memory leaks, and resource exhaustion.

API - Testing Practice Test

API - Testing Practice Test

API API Performance Testing