CS Testing & Quality Assurance 2

Question 1

A tester designs test cases using only the software's specification, without access to source code. Which technique is this?

Accepted Answer

Black-box testing

Answer

Black-box testing derives test cases from external specifications without knowledge of internal code structure.

Question 2

Which coverage criterion requires that every boolean sub-expression in a decision be evaluated to both true and false?

Accepted Answer

Condition coverage

Answer

Condition coverage requires each atomic boolean condition to take both true and false values during testing.

Question 3

A function accepts ages from 18 to 65 inclusive. Using boundary value analysis, which set of inputs is most appropriate to test?

Accepted Answer

17, 18, 65, 66

Answer

Boundary value analysis tests values at and immediately around the valid range's edges, where defects cluster.

Question 4

In test-driven development (TDD), what is the correct order of steps?

Accepted Answer

Write a failing test, write code to pass it, refactor

Answer

TDD follows the red-green-refactor cycle: a failing test first, minimal passing code, then refactoring.

Question 5

Which type of testing verifies that a recent code change has not broken existing functionality?

Accepted Answer

Regression testing

Answer

Regression testing re-runs existing tests after changes to confirm previously working behavior is intact.

(CS) Computer Science Practice Test