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CISA Practice Question: During system development, which testing phase is…
During system development, which testing phase is performed by developers to verify that individual program units function correctly?
⚠ Common exam trap
Candidates often confuse the scope of testing phases: candidates often mistake integration testing (which tests module interactions) for unit testing (which tests individual modules in isolation), especially when the question emphasizes 'by developers' and 'individual program units'.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Unit testing
Unit testing is the phase where developers test individual program units or modules in isolation to verify they function correctly according to their design specifications. This is the lowest level of testing and is typically performed using stubs and drivers to simulate interfaces with other components.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Integration testing
Why it's wrong here
Integration testing checks interaction between modules.
- ✗
User acceptance testing
Why it's wrong here
UAT is performed by end users, not developers.
- ✓
Unit testing
Why this is correct
Unit testing verifies individual program units.
- ✗
System testing
Why it's wrong here
System testing tests the entire system.
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Senior Network & Security Engineer · founder of Courseiva
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