TS Test Design & Development 2 — Questions and Answers
Question 1: Which test design technique derives test cases by identifying the minimum and maximum values plus values just inside and outside the boundaries?
- Equivalence partitioning
- Boundary value analysis (Correct answer)
- Decision table testing
- State transition testing
Correct answer: Boundary value analysis
Boundary value analysis targets the edges of equivalence partitions, testing minimum, maximum, and values immediately adjacent to those limits.
Question 2: A test designer wants to ensure every pair of input parameters is tested at least once. Which technique is most appropriate?
- All-combinations testing
- Pairwise testing (Correct answer)
- Each-choice testing
- Base-choice testing
Correct answer: Pairwise testing
Pairwise testing (all-pairs) ensures every combination of two parameter values appears in at least one test case, balancing coverage and efficiency.
Question 3: In a state transition diagram, a 'transition' is best described as:
- A condition that must be true before a state can exist
- An event or action that causes the system to move from one state to another (Correct answer)
- A wait period between states
- The initial configuration of the system under test
Correct answer: An event or action that causes the system to move from one state to another
A transition represents the movement between states triggered by an event, often with an associated guard condition and action.
Question 4: Which coverage criterion requires that every statement in the code is executed at least once?
- Branch coverage
- Statement coverage (Correct answer)
- Condition coverage
- Path coverage
Correct answer: Statement coverage
Statement coverage (also called line coverage) verifies that each executable statement has been exercised by at least one test case.
Question 5: A decision table has 4 binary conditions. How many unique condition combinations are possible?
- 8
- 12
- 16 (Correct answer)
- 4
Correct answer: 16
With 4 binary conditions, there are 2^4 = 16 unique combinations of true/false values.
Question 6: Which of the following BEST describes the purpose of a use case in test design?
- To document defects found during testing
- To describe system interactions between actors and the system to derive test scenarios (Correct answer)
- To specify the hardware configuration for testing
- To define performance benchmarks for the system
Correct answer: To describe system interactions between actors and the system to derive test scenarios
Use cases capture actor-system interactions and serve as a basis for deriving functional test scenarios, including basic and alternative flows.
Question 7: When applying equivalence partitioning to a field that accepts ages 18–65, which of the following is a valid partition?
- Values 1–17 (invalid partition)
- Values 18–65 (valid partition)
- Value 100 (invalid partition)
- All of the above represent valid partitions (Correct answer)
Correct answer: All of the above represent valid partitions
Equivalence partitioning creates both valid and invalid partitions; for age 18–65, the valid partition is 18–65 and invalid partitions include below 18 and above 65.
TS Test Design & Development 2
Which test design technique derives test cases by identifying the minimum and maximum values plus values just inside and outside the boundaries?