API API Performance Testing 3

Question 1

What is the difference between latency and response time in API performance testing?

Accepted Answer

Latency is network delay; response time includes processing and latency

Answer

They are identical metrics

Answer

Response time is measured at the server; latency at the client

Answer

Latency measures payload size; response time measures speed

Question 2

Which technique helps improve API performance by storing frequently requested responses temporarily?

Accepted Answer

Caching

Answer

Rate limiting

Answer

Pagination

Answer

Throttling

Question 3

What does a 'baseline test' establish in API performance testing?

Accepted Answer

Normal performance metrics used as a reference for future comparisons

Answer

The maximum load the API can handle

Answer

Security vulnerabilities at low load

Answer

The minimum required response time

Question 4

What HTTP mechanism allows a client to reuse an existing TCP connection for multiple requests, improving performance?

Accepted Answer

Keep-Alive

Answer

HTTP Pipelining

Answer

Content Encoding

Answer

Transfer-Encoding: chunked

Question 5

Which API design technique reduces over-fetching and can improve performance by letting clients request only the data they need?

Accepted Answer

GraphQL queries

Answer

REST pagination

Answer

HTTP compression

Answer

API versioning

Question 6

What does 'connection pooling' do to improve API performance testing results?

Accepted Answer

Reuses database connections instead of creating new ones per request

Answer

Limits the number of API endpoints tested

Answer

Pools API keys for rotation

Answer

Groups test assertions together