API API Performance Testing 2

Question 1

What is the purpose of a 'spike test' in API performance testing?

Accepted Answer

Test how the API handles a sudden large burst of traffic

Answer

Test the API with a steady gradual ramp-up

Answer

Validate API security under load

Answer

Measure API response correctness at scale

Question 2

Which metric measures the percentage of API requests that fail during a performance test?

Accepted Answer

Error rate

Answer

Latency

Answer

Throughput

Answer

Concurrency

Question 3

What does 'virtual users' (VUs) mean in the context of API performance tools like k6?

Accepted Answer

Simulated concurrent clients sending API requests

Answer

Real users monitored during a test

Answer

Test scripts written in JavaScript

Answer

API endpoints under test

Question 4

Which modern performance testing tool uses JavaScript-based scripts and is popular for CI/CD integration?

Accepted Answer

k6

Answer

JMeter

Answer

Gatling

Answer

LoadRunner

Question 5

What is the significance of setting a 'think time' in API performance test scripts?

Accepted Answer

Simulating realistic user delays between consecutive requests

Answer

Pausing the test runner between waves

Answer

Setting a timeout for assertions

Answer

Delaying server startup during tests

Question 6

What does the Apdex score measure in API performance monitoring?

Accepted Answer

User satisfaction based on response time thresholds

Answer

The number of API endpoints available

Answer

The API's uptime percentage

Answer

The number of concurrent connections