Software Testing Performance & Load Testing 2

Question 1

Which open-source tool is most widely used for load testing and measuring web application performance?

Accepted Answer

Apache JMeter

Answer

Apache JMeter is the most widely adopted open-source performance testing tool, capable of simulating heavy loads on servers and networks.

Question 2

What does the 95th percentile response time tell you during performance test analysis?

Accepted Answer

The response time below which 95% of all requests were completed

Answer

The 95th percentile means 95% of requests completed in that time or less, providing a better picture of user experience than averages, which can be skewed by outliers.

Question 3

What is 'think time' in the context of load test scripting?

Accepted Answer

The simulated pause a virtual user waits between actions to mimic real behavior

Answer

Think time simulates the natural pause real users take between actions (such as reading a page before clicking), making load scenarios more realistic.

Question 4

Which performance metric represents the percentage of requests that did not complete successfully during a test run?

Accepted Answer

Error rate

Answer

Error rate is the proportion of failed transactions relative to total transactions, and a rising error rate under load signals system instability.

Question 5

What is the Apdex (Application Performance Index) score designed to measure?

Accepted Answer

User satisfaction with application response times on a 0-to-1 scale

Answer

Apdex converts response time data into a satisfaction index from 0 (no users satisfied) to 1 (all users satisfied), simplifying communication of performance results.

Software Testing Practice Test

Software Testing Practice Test

Software Testing Performance & Load Testing 2