Why Performance Metrics Are Needed CT-PT Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   During a load test, the performance tester observes that the throughput (requests per second) plateaus while the response time continues to increase. What is the most likely interpretation?

   • AThe test is invalid because throughput should continue to increase with load.
   • BThe system is still performing well because throughput is stable.
   • CThe bottleneck is in the network, not the application.
   • DThe system has reached its maximum throughput capacity, and additional load is causing queuing and delays.
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2. 7application · medium

   During a load test, the performance tester observes that the 90th percentile response time for a login transaction is 1.8 seconds, which is within the 2-second target. However, the error rate has increased from 0.1% to 5% and the application server's CPU utilization is consistently at 95%. What is the most appropriate interpretation?

   • AThe response time target is met, so the test is a pass; errors are unrelated to performance testing.
   • BThe system is performing well because the response time target is met and errors are within acceptable limits.
   • CThe CPU utilization is the only metric that matters; response time and error rate are secondary.
   • DThe system is likely under stress: the high error rate and CPU saturation suggest the response time target may not hold under sustained load.
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   Which of the following is an example of a throughput metric?

   • AAverage response time for a login request
   • BMemory usage in gigabytes
   • CNumber of transactions processed per second
   • DPercentage of CPU utilization on the application server
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5. 9foundation · easy

   A performance test shows an average response time of 2 seconds, but the target is 1 second. What does this indicate?

   • AThe system is not meeting the performance target.
   • BThe system meets the performance target.
   • CThe target is irrelevant to the test results.
   • DThe system is performing better than expected.
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6. 10foundation · easy

   Which statement best describes the primary purpose of performance metrics in a performance test?

   • ATo quantify system behavior so it can be compared with defined targets and identify deviations.
   • BTo replace the need for load testing tools by providing manual observation methods.
   • CTo automatically fix any performance issues discovered during the test.
   • DTo provide a common language for discussing system performance with stakeholders.
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