Automation Testing Performance and Load Testing

Question 1

What is the primary purpose of load testing in software quality assurance?

Accepted Answer

To verify the system performs acceptably under expected peak user load

Answer

To find security vulnerabilities

Answer

To test individual functions in isolation

Answer

To validate UI rendering

Question 2

Which open-source tool is widely used in the US for load and performance testing of web applications?

Accepted Answer

Apache JMeter

Answer

Gatling

Answer

Locust

Answer

k6

Question 3

What is the difference between load testing and stress testing?

Accepted Answer

Load testing uses expected peak load; stress testing pushes beyond limits to find the breaking point

Answer

Stress testing uses fewer users

Answer

Load testing is only for databases

Answer

They are identical

Question 4

What does 'throughput' measure in performance testing?

Accepted Answer

The number of requests processed per unit of time (e.g., requests per second)

Answer

The time to complete a single request

Answer

The number of active users

Answer

The error rate percentage

Question 5

What is response time percentile (e.g., P95) in performance testing metrics?

Accepted Answer

95% of requests completed within this time; only 5% took longer

Answer

The average response time multiplied by 0.95

Answer

The fastest 95% of requests

Answer

A threshold for failure rate

Question 6

What is a 'think time' in a JMeter load test script?

Accepted Answer

A simulated pause between user actions to mimic realistic human behavior

Answer

Server processing time

Answer

Network latency measurement

Answer

Test setup time