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Software Testing · Most repeated questions

52 questions · 253 marks · 4 papers · 22 question types

Answer key

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

Software Testing

Most repeated questions

Official Paper

Examination Instructions & Guidelines

Solve on notebook/paper first before checking solutions.
MCQ: Exactly 1 option is correct. Negative marking applies.
MSQ: One or more options correct. Select all to score.
Scientific calculator allowed for all calculations.
Official answer key is sealed at the end of this sheet.

Type 1 · asked 4 times · Graph coverage & FSMs

Count test requirements for edge-pair coverage on a graph

Read the passage below, then answer Q1
Based on the above data, answer the given subquestions.
Q1MCQ5 Marks·Choose one option
Quiz 2 · 3 Aug 2025 (AN)Key ↓
How many test requirements are there for edge-pair coverage on G?
1. A11
2. B9
3. C8
4. D6
Read the passage below, then answer Q2
Based on the above data, answer the given subquestions.
Q2MCQ4 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
How many test requirements are there for edge-pair coverage on G?
1. A7
2. B9
3. C8
4. D6
Read the passage below, then answer Q3
Based on the above data, answer the given subquestions.
Q3MCQ4 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
How many test requirements are there for edge-pair coverage on G?
1. A6
2. B7
3. C8
4. D9
Read the passage below, then answer Q4
Consider the following control flow graph (CFG), and answer the subsequent questions.
Q4MCQ5 Marks·Choose one option
Quiz 1 · 26 Oct 2025 (AN)Key ↓
How many test requirements are there for edge-pair coverage?
1. A9
2. B10
3. C11
4. D8

Type 2 · asked 4 times · Graph coverage & FSMs

Find cyclomatic complexity / linearly independent paths of a CFG

Read the passage below, then answer Q5
Based on the above data, answer the given subquestions.
Q5MCQ6 Marks·Choose one option
Quiz 2 · 3 Aug 2025 (AN)Key ↓
How many linearly independent paths are there in G?
1. A6
2. B3
3. C4
4. D5
Read the passage below, then answer Q6
Based on the above data, answer the given subquestions.
Q6MCQ4 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
What is the cyclomatic complexity of G?
1. A3
2. B4
3. C5
4. D6
Read the passage below, then answer Q7
Based on the above data, answer the given subquestions.
Q7MCQ4 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
What is the cyclomatic complexity of G?
1. A6
2. B5
3. C4
4. D3
Read the passage below, then answer Q8
Consider the following control flow graph (CFG), and answer the subsequent questions.
Q8MCQ5 Marks·Choose one option
Quiz 1 · 26 Oct 2025 (AN)Key ↓
What is the cyclomatic complexity of the given CFG?
1. A3
2. B4
3. C5
4. D6

Type 3 · asked 3 times · Integration testing

Which integration approach needs test stubs or drivers

Q9MCQ5 Marks·Choose one option
Quiz 2 · 3 Aug 2025 (AN)Key ↓
In integration testing, top-down approach requires the use of which of the following placeholder components?
1. ATest drivers
2. BTest stubs
3. CBoth test drivers and test stubs
4. DIt does not require placeholder components
Q10MCQ5 Marks·Choose one option
Quiz 1 · 26 Oct 2025 (AN)Key ↓
A ____________ is a skeletal implementation of a software module, used to develop or test a component that calls the stub or depends on it. Fill in the blank with correct option.
1. Atest method
2. Btest driver
3. Ctest stub
4. Dtest suite
Q11MCQ5 Marks·Choose one option
Quiz 1 · 26 Oct 2025 (AN)Key ↓
The ________ approach to integration testing does not require the use of test stubs or test drivers. Fill in the blank with the correct option.
1. Abottom-up
2. Btop-down
3. Csandwich
4. Dbig bang

Type 4 · asked 3 times · Logic coverage

Find RICC pairs for a clause from a truth table

Read the passage below, then answer Q12
Based on the above data, answer the given subquestions.
Q12MCQ5 Marks·Choose one option
Quiz 2 · 3 Aug 2025 (AN)Key ↓
Considering the row numbers (#) given in the truth table, identify all RICC pairs for the clause b.
1. A
2. B
3. C
4. D
Read the passage below, then answer Q13
Based on the above data, answer the given subquestions.
Q13MCQ4 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Which of the following is the set of RICC pairs for clause b?
1. A
2. B
3. C
4. D
Read the passage below, then answer Q14
Based on the above data, answer the given subquestions.
Q14MCQ4 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
Which of the following is the set of RICC pairs for clause a?
1. A
2. B
3. C
4. D

Type 5 · asked 3 times · Input space partitioning

Count tests needed for an ISP criterion (ECC, BCC, ACoC)

Q15MCQ6 Marks·Choose one option
Quiz 2 · 3 Aug 2025 (AN)Key ↓
1. A8
2. B9
3. C10
4. D7
Q16MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. A4
2. B12
3. C6
4. D8
Q17MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. A12
2. B24
3. C48
4. D64

Type 6 · asked 3 times · Symbolic & concolic testing

Find the path constraint that reaches an abort() call

Read the passage below, then answer Q18
Q18MCQ5 Marks·Choose one option
Quiz 2 · 3 Aug 2025 (AN)Key ↓
1. A
2. B
3. C
4. D
Q19MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. A
2. B
3. C
4. D
Q20MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 7 · asked 2 times · Graph coverage & FSMs

Which graph coverage equals state coverage on an FSM

Q21MCQ5 Marks·Choose one option
Quiz 2 · 3 Aug 2025 (AN)Key ↓
Which of the following graph coverage criteria is equivalent to state coverage on a finite state machine (FSM)?
1. ANode coverage
2. BPrime path coverage
3. CEdge coverage
4. DEdge-pair coverage
Q22MCQ5 Marks·Choose one option
Quiz 1 · 26 Oct 2025 (AN)Key ↓
Which of the following graph coverage criteria is equivalent to state coverage on a finite state machine (FSM)?
1. ANode coverage
2. BEdge coverage
3. CEdge-pair coverage
4. DPrime path coverage

Type 8 · asked 2 times · Graph coverage & FSMs

Find which strings an FSM accepts

Q23MCQ4 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. AA string of only ones
2. BA string starting with one, followed by zeros, and ending with a one
3. CA string starting with zero, followed by ones, and ending with a zero
4. DA string starting with a zero and ending with ones
Q24MCQ4 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. AA string of only zeros
2. BA string starting with one, followed by zeros, and ending with a one
3. CA string starting with a one and ending with zeros
4. DA string starting with a one, followed by zeros, and ending with a zero

Type 9 · asked 2 times · Data flow coverage

Which data flow coverage a set of test paths satisfies for a variable

Q25MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. AAll-Defs Coverage only
2. BAll-Uses Coverage only
3. CAll-DU-Paths Coverage
4. DNone of these
Q26MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. AAll-Defs Coverage only
2. BAll-Uses Coverage only
3. CAll-DU-Paths Coverage
4. DNone of these

Type 10 · asked 2 times · Logic coverage

Find RACC pairs for a clause from a truth table

Read the passage below, then answer Q27
Based on the above data, answer the given subquestions.
Q27MCQ5 Marks·Choose one option
Quiz 2 · 3 Aug 2025 (AN)Key ↓
Considering the row numbers (#) given in the truth table, which of the following is a RACC pair for the clause b.
1. A(2, 4)
2. B(2, 5)
3. C(4, 6)
4. D(3, 8)
Read the passage below, then answer Q28
Based on the above data, answer the given subquestions.
Q28MCQ4 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
Which of the following is the set of RACC pairs for clause a?
1. A{(1, 5), (2, 6), (3, 7)}
2. B{(2, 6)}
3. C{(1, 5), (3, 7), (4, 8)}
4. D{(1, 6)}

Type 11 · asked 2 times · Grammars & mutation testing

Find the language generated by a context-free grammar

Q29MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. A
2. B
3. C
4. D
Q30MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 12 · asked 2 times · Grammars & mutation testing

Name the inheritance mutation operator (super / constructor change)

Q31MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. AParent Constructor Deletion (PCD)
2. BSuper Keyword Deletion (SKD)
3. COverriding Method Deletion (OMD)
4. DHiding Variable Insertion (HVI)
Q32MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. AHiding Variable Insertion (HVI)
2. BSuper Keyword Deletion (SKD)
3. CParent Constructor Deletion (PCD)
4. DOverriding Method Deletion (OMD)

Type 13 · asked 2 times · Grammars & mutation testing

Name the mutation operator used to get a mutant from a statement

Q33MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. AAssignment operator replacement
2. BAbsolute value insertion
3. CScalar variable replacement
4. DArithmetic operator replacement
Q34MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. AScalar variable replacement
2. BArithmetic operator replacement
3. CAbsolute value insertion
4. DAssignment operator replacement

Type 14 · asked 2 times · Object-oriented testing

Name the OO inheritance anomaly in a Java class hierarchy

Q35MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. AState Definition Anomaly (SDA)
2. BState Definition Inconsistency Anomaly (SDIA)
3. CInconsistent Type Use (ITU)
4. DState Visibility Anomaly (SVA)
Q36MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. AState Definition Anomaly (SDA)
2. BState Definition Inconsistency Anomaly (SDIA)
3. CInconsistent Type Use (ITU)
4. DState Visibility Anomaly (SVA)

Type 15 · asked 2 times · Object-oriented testing

Find which methods are invoked through overriding

Q37MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. A
2. B
3. C
4. D
Q38MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 16 · asked 2 times · Testing basics, JUnit & TDD

Pick the correct implementation for a TDD user story's tests

Q39MSQ5 Marks·Choose all correct options
End Term · 31 Aug 2025 (AN)Key ↓
Which of the following are the appropriate implementations of the user story?
1. A
2. B
3. C
4. D
Q40MSQ5 Marks·Choose all correct options
End Term · 31 Aug 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 17 · asked 2 times · Web application testing

Pick the type of client-side bypass testing

Q41MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Which type of client-side testing verifies if a web application adequately evaluates invalid inputs?
1. AControl flow level bypass testing
2. BValue level bypass testing
3. CParameter level bypass testing
4. DUser-session data based testing
Q42MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
Which type of client-side testing executes test cases that break the normal execution sequence of a web application?
1. AParameter level bypass testing
2. BControl flow level bypass testing
3. CValue level bypass testing
4. DUser-session data based testing

Type 18 · asked 2 times · Web application testing

Pick the ATG transition type for a user action

Q43MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Consider that a user clicks on a hyperlink in a web page, and the browser navigates to a different page. Which type of transition would take place in the Application Transition Graph (ATG) in this scenario?
1. AOperational Transition
2. BForm Link Transition
3. CRedirect Transition
4. DSimple Link Transition
Q44MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
Consider that a user fills a form in a web application, but instead of submitting the form, she clicks on the refresh button in the browser. Which type of transition would take place in the Application Transition Graph (ATG) in this scenario?
1. AOperational Transition
2. BForm Link Transition
3. CRedirect Transition
4. DSimple Link Transition

Type 19 · asked 2 times · Web application testing

Identify atomic sections in a Java servlet

Q45MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
1. A
2. B
3. C
4. D
Q46MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 20 · asked 2 times · Non-functional testing & metrics

Pick performance, regression or functional testing for a scenario

Q47MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Consider that an organization is building a large-scale software application. Which of the following types of testing is done to ensure the speed and response time of the system are conforming to the specifications?
1. APerformance Testing
2. BUsability Testing
3. CFunctional Testing
4. DRegression Testing
Q48MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
Consider that some modules are modified or added in an existing software program. Which of the following types of testing is done to ensure that all existing and new modules are working correctly?
1. AFunctional Testing
2. BPerformance Testing
3. CRegression Testing
4. DUsability Testing

Type 21 · asked 2 times · Non-functional testing & metrics

Pick load, stress, spike or soak testing for a scenario

Q49MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Which of the following tests is performed to monitor the system parameters, such as memory utilization, to detect memory leaks or other performance issues under the continuous expected load?
1. ALoad Testing
2. BStress Testing
3. CSpike Testing
4. DSoak Testing
Q50MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
Consider that for testing a web application, the number of concurrent users was suddenly increased by a very large amount, and the performance of the application was measured. Which of the following types of testing does this scenario represent?
1. AStress Testing
2. BSpike Testing
3. CSoak Testing
4. DLoad Testing

Type 22 · asked 2 times · Non-functional testing & metrics

Classify a software metric (BMI, DRE) into its category

Q51MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Backlog Management Index (BMI) belongs to which of the following categories of software metrics?
1. AIn-Process Quality Metrics
2. BProduct Quality Metrics
3. CObject-Oriented Software Metrics
4. DMaintainance Quality Metrics
Q52MCQ5 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
Defect Removal Effectiveness (DRE) belongs to which of the following categories of software metrics?
1. AProduct Quality Metrics
2. BObject-Oriented Software Metrics
3. CMaintenance Quality Metrics
4. DIn-Process Quality Metrics

Official Key

Master Answer Key & Explanations

Official answer keys from IIT Madras BS past papers. Click any question to review.

Reveal Key

Q1C

Q2B

Q3C

Q4B

Q5B

Q6A

Q7D

Q8A

Q9B

Q10C

Q11D

Q12C

Q13C

Q14C

Q15D

Q16A

Q17C

Q18C

Q19C

Q20C

Q21A

Q22A

Q23C

Q24B

Q25A

Q26B

Q27A

Q28B

Q29A

Q30A

Q31A

Q32B

Q33C

Q34B

Q35A

Q36B

Q37D

Q38A

Q39A, B

Q40B, C

Q41B

Q42B

Q43D

Q44A

Q45D

Q46D

Q47A

Q48C

Q49D

Q50B

Q51D

Q52D

Questions and answer keys are reproduced from the official IIT Madras BS papers. Topics and repeated question types are BTechi’s own grouping. BTechi is not affiliated with IIT Madras.