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Why is error guessing considered a valuable testing technique despite lacking formal test cases?

hard📝 Conceptual Q10 of 15
Testing Fundamentals - Functional Testing Techniques
Why is error guessing considered a valuable testing technique despite lacking formal test cases?
ABecause it replaces the need for any other testing
BBecause it uses tester experience to find hidden or unexpected defects
CBecause it only tests the user interface
DBecause it automates all test execution
Step-by-Step Solution
Solution:

  1. Step 1: Understand the value of error guessing

    Error guessing leverages tester knowledge to find defects missed by formal tests.

  2. Step 2: Evaluate options for correctness

    Because it uses tester experience to find hidden or unexpected defects correctly states this value. Others exaggerate or misstate error guessing's role.

  3. Final Answer:

    Because it uses tester experience to find hidden or unexpected defects -> Option B

  4. Quick Check:

    Error guessing value = experience finds hidden bugs [OK]
Quick Trick: Tester experience finds bugs formal tests miss [OK]
Common Mistakes:
  • Thinking error guessing replaces all testing
  • Believing it only tests UI
  • Confusing it with automation

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