White Box Testing

What is the primary goal of white-box testing?

• To test system performance under load
• To verify internal logic and code paths
• To validate user requirements
• To check UI responsiveness
• To perform usability testing

Which of the following is a test adequacy criterion focused on statements in the code?

• Path Coverage
• Branch Coverage
• Statement Coverage
• Condition Coverage
• Mutation Coverage

In a control flow graph (CFG), what do nodes typically represent?

• Test cases
• Program variables
• Basic blocks or statements
• System requirements
• External modules

Which metric requires that every possible branch (true/false) of each decision is executed at least once?

• Statement Coverage
• Branch Coverage
• Path Coverage
• Loop Coverage
• Data Flow Coverage

Path coverage is often infeasible because:

• Programs have too few branches
• The number of paths can be exponential or infinite
• Paths are irrelevant to correctness
• It is the same as statement coverage
• It ignores loops

Which white-box technique focuses on how data values are defined and where they are used?

• Control Flow Testing
• Data Flow Testing
• Mutation Testing
• Boundary Value Analysis
• Random Testing

What does cyclomatic complexity measure?

• Number of variables
• Number of inputs
• Number of line comments
• Number of independent paths through the program
• Memory usage

Which of the following is NOT typically depicted in a control flow graph?

• Edges representing flow of control
• Nodes representing basic blocks
• Edges representing data value ranges
• Entry and exit nodes
• Decision nodes

A 'basic block' in CFG terms is:

• A group of contiguous statements with a single entry and single exit
• A single variable declaration
• A test case
• A decision with two outcomes
• An external function call

Which adequacy criterion considers pairs of successive statements (i.e., edges) in the CFG?

• Statement Coverage
• Edge Coverage
• Condition Coverage
• Path Coverage
• Mutation Coverage