Analysis and Reporting CT-PT Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   After a load test, the tester finds that the application meets the response-time target but the error rate is 2% under peak load. The operations team wants to know if this is acceptable for launch. The tester needs to present the finding to a mixed audience of developers and business managers. What is the most appropriate way to frame the error rate?

   • ARecommend immediate launch because the response-time target is met.
   • BState that a 2% error rate is within the acceptable range for most web applications.
   • CAsk the developers to fix all errors before the report is written.
   • DPresent the error rate alongside the business impact, such as the estimated number of failed transactions per hour and the potential revenue loss.
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2. 7expert · hard

   A tester is analyzing results from a load test. The average response time is 500 ms, but the tester notices that the response times are bimodal: 80% of requests complete in 200 ms, and 20% complete in 1.5 seconds. The tester needs to understand this pattern. What is the most likely explanation?

   • AA subset of requests is taking a different code path, such as a cache miss or a different database query.
   • BThe load generators are not synchronized, causing some requests to be delayed.
   • CThe average response time is misleading, and the test should be re-run.
   • DThe network is intermittently congested, causing some requests to be slower.
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4. 8application · medium

   A tester is communicating the results of a performance test to a group of developers. The test showed that a specific API endpoint is slow because of an N+1 query problem. The tester needs to explain the finding so the developers can act on it. What is the most effective approach?

   • AState that the endpoint is slow and needs to be optimized.
   • BRecommend using a different programming language to improve performance.
   • CShow the response-time breakdown for the endpoint and point to the database query count as the root cause.
   • DPresent the business impact of the slow endpoint, such as user abandonment.
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5. 9application · medium

   A performance tester is writing a report for a mobile banking app. The test showed that the login endpoint has a 95th percentile response time of 3 seconds, which exceeds the 2-second target. The tester also found that the bottleneck is a database query that is missing an index. What is the most appropriate way to present this finding in the report?

   • ASuggest that the 2-second target is too strict for a login page and should be relaxed.
   • BReport only the 95th percentile response time and the target, leaving the root cause for the developers to discover.
   • CState the failure, identify the root cause (missing index), and recommend adding the index with an estimated impact on response time.
   • DRecommend re-running the test with a higher load to see if the problem gets worse.
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6. 10application · medium

   A tester is creating a report for a performance test that included several test scenarios: a smoke test, a load test, and a stress test. The report needs to be clear and concise for a mixed audience. What is the best way to present the results of the different scenarios?

   • APresent each scenario in a separate section, with a summary of the key findings and a comparison to the targets.
   • BList only the results of the load test, as it is the most important scenario.
   • CCombine all results into a single chart to show the overall performance.
   • DProvide a raw data dump for each scenario and let the audience interpret it.
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