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Which of the following is a benefit of writing unit tests?

easy📝 Conceptual Q2 of 15
Testing Fundamentals - Testing Types and Levels
Which of the following is a benefit of writing unit tests?
AThey help find bugs early in development
BThey replace the need for manual testing
CThey improve the application's user interface
DThey guarantee the software is bug-free
Step-by-Step Solution
Solution:

  1. Step 1: Identify benefits of unit testing

    Unit tests help detect errors early by testing small code parts frequently during development.

  2. Step 2: Evaluate each option

    They help find bugs early in development correctly states early bug detection. Options B, C, and D are incorrect because unit tests don't replace manual testing, don't improve UI directly, and can't guarantee zero bugs.

  3. Final Answer:

    They help find bugs early in development -> Option A

  4. Quick Check:

    Unit test benefit = Early bug detection [OK]
Quick Trick: Unit tests catch bugs early, not replace manual tests [OK]
Common Mistakes:
  • Believing unit tests fix UI issues
  • Assuming unit tests guarantee no bugs
  • Thinking unit tests remove all manual testing

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