Implementation CT-PT Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which unit of measurement is most commonly used to express throughput in performance testing?

   • APercentage of CPU utilization
   • BMilliseconds (ms)
   • CNumber of virtual users
   • DTransactions per second (TPS)
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2. 12expert · hard

   A performance test engineer is analyzing the results of a load test on a web application. The test increased concurrency from 100 to 1,000 users. The throughput curve shows a steady increase until 600 users, then a plateau, and finally a slight decline. The response time curve shows a sharp increase starting at 600 users. The engineer needs to determine the optimal operating point for the system. Which point should the engineer recommend?

   • AThe point at 1,000 users, because the highest concurrency level provides the most realistic test of the system's limits.
   • BThe point at 100 users, because it is the lowest concurrency and therefore the safest.
   • CThe point at 600 users, because it is where throughput reaches its maximum while response time is still acceptable.
   • DThe point where response time starts to increase, regardless of throughput.
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   During a load test, a performance test script encounters an unexpected server error (HTTP 500) on a specific request. The script currently aborts the entire iteration when this happens, causing the test to stop prematurely. The engineer wants the script to handle this error by retrying the request a limited number of times before giving up. Which approach should the engineer implement?

   • ARemove the request from the script to avoid the error.
   • BAdd an assertion that verifies the response status code is 200, and if it fails, log the error and continue.
   • CIncrease the think time before the request to reduce the likelihood of the error.
   • DAdd error handling logic that checks the response status code, and if it is 500, retry the request up to three times with a short delay between retries.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A performance test script for a web application logs in with a user account, searches for a product, and adds it to a shopping cart. The script currently uses a hard-coded product ID. During a load test, all virtual users search for the same product, which skews the results. The engineer needs to make the script more realistic. Which approach should the engineer take?

   • ACorrelate the product ID from the server response of the login request.
   • BAdd an assertion to verify that the product search returns a valid result.
   • CParameterize the product ID using a data file containing a variety of valid product IDs.
   • DIncrease the think time between the login and search steps.
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6. 15foundation · easy

   Which of the following is an error handling mechanism in a performance test script?

   • ARetrying a failed request after a short delay
   • BHardcoding all request parameters
   • CRemoving all assertions from the script
   • DIncreasing the think time between requests
   Reveal Solution Discussion Select an answer first