The IIT Madras BS Software Testing (Software Testing) Quiz 1 paper sat on 15 Mar 2026, in the January 2026 term: 22 questions for 102 marks in 120 minutes. Every question is below with its answer. Take it as a timed mock test to be marked, or read it through first.
In an organization, software quality is regarded as an important aspect. Therefore, test engineers carefully measure and improve software quality. Identify the minimum process maturity level of this organization.
Level 1
Level 2
Level 3
Level 4
Correct answer
Level 4
Consider the following statements regarding software design and choose the correct option. i) A module encapsulates functionality and interacts with other modules through well-defined interfaces. ii) Interfaces define the permitted interactions between modules without exposing internal implementation details.
Statement i) is correct and Statement ii) is incorrect.
Statement ii) is correct and Statement i) is incorrect.
Both statements are incorrect.
Both statements are correct.
Correct answer
Both statements are correct.
Which of the following options best describes the difference between test requirements and test cases?
Test requirements define specific input values, while test cases define test objectives.
Test requirements represent the required coverage criteria, whereas test cases define an execution to satisfy one or more of those requirements.
Test requirements are created after executing test cases to measure test effectiveness.
Test cases and test requirements are interchangeable terms used at different stages of the testing process.
Correct answer
Test requirements represent the required coverage criteria, whereas test cases define an execution to satisfy one or more of those requirements.
Consider the following statements regarding test automation with JUnit and choose the correct option. i) JUnit does not support test fixtures. ii) In a test class, each test method checks an assertion and reports to the test runner whether the test failed or succeeded.
Statement i) is correct and Statement ii) is incorrect.
Statement ii) is correct and Statement i) is incorrect.
Both statements are incorrect.
Both statements are correct.
Correct answer
Statement ii) is correct and Statement i) is incorrect.
In the ____________ approach for integration testing, all individually tested modules are put together to construct the entire system which is tested as a whole. Fill in the blank with correct option.
Top-down
Bottom-up
Big bang
Sandwich
Correct answer
Big bang
Consider an email client application that sends a request to a mail server, the mail server then responds with new email messages for a user. Which type of interface does this scenario represent?
External file interface
Message passing interface
Procedure call interface
Shared memory interface
Correct answer
Message passing interface
Consider the following statements regarding structural graph coverage criteria, and choose the correct option. i) Prime paths are maximal simple paths. ii) Edge-pair coverage does not require self-loops to be visited. iii) Test paths to achieve node and edge coverage can be obtained by simple modifications to BFS algorithm over graphs.
Statement i) and iii) are correct. Statement ii) is incorrect.
Statement i) is correct. Statement ii) and iii) are incorrect.
Statement ii) and iii) are correct. Statement i) is incorrect.
Statement i) and ii) are correct. Statement iii) is incorrect.
Correct answer
Statement i) and iii) are correct. Statement ii) is incorrect.
Which of the following types of testing is done by end customer to ensure that the delivered products meets the committed requirements?
Unit Testing
Integration Testing
Acceptance Testing
System Testing
Correct answer
Acceptance Testing
The ___________ in a control flow graph (CFG) represents the minimum number of paths required for basis path testing. Fill in the blank with the appropriate option.
number of prime paths
number of linearly independent paths
number of DD-paths
number of edges
Correct answer
number of linearly independent paths
Which of the following graph coverage criteria is equivalent to transition coverage on a finite state machine (FSM)?
Node coverage
Edge coverage
Edge-pair coverage
Prime path coverage
Correct answer
Edge coverage
Edge coverage on a CFG is equivalent to which of the following classical coverage criteria?
Loop coverage
Branch coverage
Decision coverage
Statement coverage
Correct answer
Branch coverage
Which of the following options represent a valid condition for a DD-path in a control flow graph (CFG)?
It consists of a single vertex with in-degree (initial vertex).
It consists of a single vertex with in-degree or out-degree .
It consists of a single vertex with in-degree and out-degree as 1.
It is a maximal chain of length .
Correct answers
It consists of a single vertex with in-degree (initial vertex).
It consists of a single vertex with in-degree and out-degree as 1.
Prime path coverage subsumes which of the following coverage criteria for control and data flow graphs?
Edge-pair coverage
All Uses Coverage
Edge coverage
Complete path coverage
Correct answers
All Uses Coverage
Edge coverage
Consider the following Java code for class, there are some faults in the implementation. The method needs to be tested using the JUnit test class .
Identify which of the test cases would be able to uncover the faults in the program.
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Correct answers
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Consider the control flow graph (CFG), , where • Set of vertices • Set of edges • Initial vertex • Final vertex Based on the above data, answer the given subquestions.
How many test requirements are there for edge-pair coverage?
9
10
11
8
Correct answer
10
Consider the control flow graph (CFG), , where • Set of vertices • Set of edges • Initial vertex • Final vertex Based on the above data, answer the given subquestions.
How many test requirements are there for prime path coverage?
11
12
10
13
Correct answer
12
Consider the control flow graph (CFG), , where • Set of vertices • Set of edges • Initial vertex • Final vertex Based on the above data, answer the given subquestions.
What is the cyclomatic complexity of the given CFG?
3
4
5
6
Correct answer
3
Consider the following data flow graph, and answer the subsequent questions.
How many test requirements are there for All-Defs-Coverage for variable ?
1
2
3
4
Correct answer
2
Consider the following data flow graph, and answer the subsequent questions.
How many test requirements are there for All-Uses-Coverage for variable ?
3
4
5
6
Correct answer
5
Consider the following data flow graph, and answer the subsequent questions.
How many unique du-paths are there for variable ? Note: Do not consider subsumption for the du-paths.
3
4
5
6
Correct answer
6
Consider the control flow graph (CFG), , where • Set of vertices • Set of edges • Initial vertex • Final vertex Based on the above data, answer the given subquestions.
A written answer, not marked automatically.
Consider the following data flow graph, and answer the subsequent questions.
A written answer, not marked automatically.
