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You wrote an integration test for two modules, but the test fails with a null pointer error. What is the most likely cause?

medium📝 Debug Q14 of 15
Testing Fundamentals - Testing Types and Levels
You wrote an integration test for two modules, but the test fails with a null pointer error. What is the most likely cause?
AModules are not properly connected or data is missing between them
BUnit tests for each module passed successfully
CThe system testing phase was skipped
DThe test environment has too much memory
Step-by-Step Solution
Solution:
  1. Step 1: Analyze null pointer error in integration

    Null pointer errors usually happen when one module expects data from another but receives nothing or null.
  2. Step 2: Connect error to module interaction

    If modules are not properly connected or data is missing, integration test fails with null pointer.
  3. Final Answer:

    Modules are not properly connected or data is missing between them -> Option A
  4. Quick Check:

    Null pointer = missing data between modules [OK]
Quick Trick: Null pointer in integration means missing connection/data [OK]
Common Mistakes:
  • Assuming unit tests guarantee integration success
  • Blaming system testing for integration errors
  • Ignoring environment issues unrelated to null pointers

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