Fault Seeding Tools CTAL-TTA Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A test team seeded 50 known faults into a module before executing their regression suite. After the test run, they found 40 of the seeded faults and 20 real defects. Using the standard fault-seeding estimation formula, what is the estimated total number of real defects in the module?

   • A16
   • B25
   • C30
   • D50
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2. 2application · medium

   A test manager is considering using fault seeding to estimate the number of remaining defects in a system. The team has limited time and resources. Which concern is most important to address before relying on the estimate?

   • AThe test suite must have a high pass rate on the unseeded code.
   • BThe seeded faults must be representative of the real fault distribution in the system.
   • CThe tool used for seeding must be able to insert faults without changing the code's behavior.
   • DThe test team must be blinded to the locations of the seeded faults.
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4. 3foundation · easy

   If 20 faults are seeded and 15 are found during testing, what is the estimated total number of real defects if 30 real defects were found?

   • A40
   • B45
   • C35
   • D50
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5. 4foundation · easy

   What is a common feature of fault seeding tools?

   • AThey eliminate the need for testers to analyze results
   • BThey automatically fix the seeded faults after detection
   • CThey provide a way to record which seeded faults were detected
   • DThey generate random faults without any control
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6. 5expert · hard

   A test team seeded 80 faults into a system and ran the regression suite. They found 60 seeded faults and 25 real defects. The team is aware that the seeded faults were inserted by a developer who has deep knowledge of the codebase and may have inadvertently made them easier to find. Which of the following is the most significant limitation affecting the estimate?

   • AThe number of seeded faults (80) is too small to provide a reliable estimate.
   • BThe regression suite may not have been run in a production-like environment.
   • CThe seeded faults may not be representative of real defects because the developer's knowledge could bias the types of faults inserted.
   • DThe test suite may have been executed by different testers, leading to inconsistent results.
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