Software Testing Quiz

1. What is the main purpose of software testing?

A. To prove that the software has no defects
B. To identify defects and ensure software meets requirements
C. To make the software run faster
D. To reduce the number of lines of code

The primary purpose of software testing is to identify defects and verify that the software meets specified requirements. It's impossible to prove software has no defects (option A), and testing doesn't directly affect performance (option C) or code size (option D).

2. Which of these is NOT a type of functional testing?

A. Unit testing
B. Integration testing
C. Performance testing
D. System testing

Performance testing is a type of non-functional testing that evaluates how the system performs under certain conditions. Unit, integration, and system testing are all types of functional testing that verify specific functionalities.

3. What is the difference between verification and validation?

A. Verification is done by developers, validation by testers
B. Verification is manual, validation is automated
C. Verification checks if the product is built right, validation checks if the right product is built
D. There is no difference

Verification ensures the product is being built correctly according to specifications (process-oriented), while validation ensures the right product is being built to meet user needs (product-oriented). This is often summarized as "Verification: Are we building the product right? Validation: Are we building the right product?"

4. Which testing technique is based on the internal code structure?

A. White-box testing
B. Black-box testing
C. Grey-box testing
D. Acceptance testing

White-box testing (also called clear-box or structural testing) examines the internal structure and implementation of the code. Black-box testing focuses on functionality without knowledge of internal implementation, while grey-box combines both approaches.

5. What is the purpose of regression testing?

A. To test new features
B. To ensure existing functionality still works after changes
C. To test the software in different environments
D. To measure system performance

Regression testing verifies that previously developed and tested software still performs correctly after changes, ensuring that new code changes haven't adversely affected existing functionality.

6. Which of these is an example of black-box testing technique?

A. Statement coverage
B. Equivalence partitioning
C. Path testing
D. Branch coverage

Equivalence partitioning is a black-box technique that divides input data into equivalent partitions. The other options (statement coverage, path testing, branch coverage) are white-box techniques based on code structure.

7. What is the main advantage of automated testing?

A. It eliminates the need for manual testing
B. It can find all bugs in the software
C. It allows for frequent and repeatable execution of test cases
D. It's always cheaper than manual testing

The main advantage of automated testing is the ability to repeatedly execute test cases quickly and consistently, especially for regression testing. It doesn't eliminate manual testing (option A), can't find all bugs (option B), and isn't always cheaper (option D) as it requires initial investment.

8. Which testing level focuses on individual components or modules?

A. Unit testing
B. Integration testing
C. System testing
D. Acceptance testing

Unit testing verifies the smallest testable parts (units) of the software, typically individual functions or methods. Integration testing checks interactions between components, system testing evaluates the complete system, and acceptance testing validates the system against business requirements.

9. What is a test case?

A. A document describing the testing process
B. A set of conditions to verify a particular feature
C. A tool used for automated testing
D. A metric to measure test coverage

A test case is a set of conditions or variables under which a tester will determine whether a feature or requirement is working correctly. It typically includes inputs, execution conditions, and expected results.

10. Which principle states that exhaustive testing is impossible?

A. Defect clustering
B. Pesticide paradox
C. Testing shows presence of defects
D. Early testing

The principle "Testing shows presence of defects" implies that testing can show defects are present, but cannot prove there are no defects. Exhaustive testing (testing all possible combinations) is impractical except for trivial cases, so we use risk analysis and prioritization to guide testing efforts.