Typical Results of a Performance Test CT-PT Practice Questions (Page 4)

Questions 16–20

1. 16application · easy

   A performance test report is being written. The test showed that the system meets its throughput objective of 1000 transactions per second, but the response time objective of 2 seconds was missed, with an average of 2.5 seconds. How should this be summarized in the report's executive summary?

   • AThe system partially met its performance objectives, meeting throughput but failing response time.
   • BThe system failed the performance test because it missed the response time objective.
   • CThe test is inconclusive because one objective was met and one was not.
   • DThe system passed the performance test because it met the throughput objective.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   A performance test is run after a code optimization. The average response time improved from 3.0 seconds to 2.5 seconds compared to the baseline. What does this comparison indicate?

   • AThe baseline was set incorrectly
   • BNo change in performance
   • CA performance regression
   • DA performance improvement
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A regression test is run after a code change. The baseline showed a 90th percentile response time of 500 ms. The new test shows a 90th percentile of 750 ms, but the average response time has improved from 400 ms to 350 ms. What is the most likely conclusion?

   • AThe test results are invalid because the average and percentile tell different stories.
   • BThe code change had no effect on performance.
   • CThe code change introduced a regression for a subset of users.
   • DThe code change improved overall performance for all users.
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   In a performance test, response times increase sharply when CPU utilization reaches 90%, while throughput plateaus. What does this pattern most likely indicate?

   • AA disk I/O bottleneck
   • BA CPU bottleneck
   • CA network bandwidth bottleneck
   • DA memory leak
   Reveal Solution Discussion Select an answer first
6. 20expert · hard

   A team is investigating a performance regression. The baseline from last month showed a 95th percentile response time of 800 ms. The new test shows 1200 ms. The application code has not changed, but the database was migrated from a dedicated server to a shared cloud instance. What is the most likely cause of the regression?

   • AThe test data has changed, causing slower queries.
   • BThe network between the application and database is slower.
   • CThe application code has a new bug that was introduced by the database migration.
   • DThe shared cloud database instance is experiencing resource contention from other tenants.
   Reveal Solution Discussion Select an answer first