CPA Testing, Debugging & Code Optimization 2

Question 1

Which testing approach tests the internal logic and structure of the code rather than just its external behavior?

Accepted Answer

White-box testing

Answer

White-box testing examines the internal code structure, branches, and paths, unlike black-box testing which only evaluates inputs and outputs.

Question 2

What is a 'breakpoint' in the context of debugging?

Accepted Answer

A marker that pauses execution so the developer can inspect state

Answer

A breakpoint is a deliberate stopping point set by the developer in a debugger to pause program execution and examine variables and flow.

Question 3

Which metric measures the percentage of source code lines executed during testing?

Accepted Answer

Code coverage

Answer

Code coverage (specifically line coverage) reports what percentage of code lines were executed by the test suite.

Question 4

What is the purpose of a stub in unit testing?

Accepted Answer

To replace a real dependency with a minimal controlled implementation

Answer

A stub replaces a real dependency (like a database or API) with a simple controlled version so the unit under test can run in isolation.

Question 5

Which optimization technique moves a loop-invariant computation outside of the loop?

Accepted Answer

Loop hoisting (code motion)

Answer

Loop hoisting (also called loop-invariant code motion) moves calculations whose result does not change across iterations outside the loop to avoid redundant work.

(CPA) Certified Associate Programmer Practice Test

(CPA) Certified Associate Programmer Practice Test

CPA Testing, Debugging & Code Optimization 2