White-box testing techniques in Software Engineering - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Statement Coverage

Which of the following best describes statement coverage in white-box testing?

A It measures whether every line of code has been executed at least once during testing.

B It ensures every possible input value is tested for the program.

C It verifies that all user interface elements are accessible.

D It checks if the software meets the business requirements.

💡 Hint

Think about coverage related to code lines executed.

Statement coverage means testing so that every line of code runs at least once. This helps find parts of code that never run.

📋 Factual

intermediate

Branch Coverage Purpose

What is the main goal of branch coverage in white-box testing?

A To ensure that both true and false outcomes of every decision point in the code are tested.

B To verify the software's performance under load.

C To ensure the software's user interface is intuitive.

D To check if the software handles invalid inputs gracefully.

💡 Hint

Focus on decision points and paths in code.

Branch coverage ensures that every possible branch (true/false) of each decision is tested.

🔍 Analysis

advanced

Evaluating Loop Testing Techniques

Consider a loop that runs from 1 to 10. Which white-box testing technique focuses on testing the loop with zero, one, and multiple iterations?

A Path coverage

B Condition coverage

C Loop testing

D Data flow testing

💡 Hint

Think about testing loops specifically.

Loop testing targets loops by checking cases like zero iterations, one iteration, and many iterations to find loop-related errors.

❓ Comparison

advanced

Difference Between Condition and Decision Coverage

Which statement correctly distinguishes condition coverage from decision coverage in white-box testing?

A Condition coverage ensures all code lines run; decision coverage ensures all functions are called.

B Condition coverage tests all possible input values; decision coverage tests all output values.

C Condition coverage focuses on user interface elements; decision coverage focuses on database queries.

D Condition coverage tests each boolean sub-expression independently; decision coverage tests the overall decision outcome.

💡 Hint

Think about testing parts of a decision versus the whole decision.

Condition coverage tests each condition inside a decision separately, while decision coverage tests the final true/false result of the entire decision.

❓ Reasoning

expert

Choosing the Best Technique for Complex Code Paths

You have a complex function with many nested decisions and loops. Which white-box testing technique is best suited to ensure all possible execution paths are tested?

A Statement coverage

B Path coverage

C Loop testing

D Condition coverage

💡 Hint

Consider the technique that covers all sequences of decisions.

Path coverage tests every possible route through the code, including all combinations of decisions and loops, making it ideal for complex code.