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CT · All 2023 papers

BSCS1001 · 28 questions · 100 marks · 2 papers

Answer key

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

BSCS1001 · Computational Thinking

All 2023 papers

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.
NAT: Numerical response. No negative marking.
Scientific calculator allowed for all calculations.
Official answer key is sealed at the end of this sheet.

Qualifier · September 2023Qualifier

Useful Reference Data for this Paper
Q1MCQ2 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
5. E
Q2MCQ3 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q3MCQ4 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q4MCQ4 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q5MCQ4 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q6MCQ4 Marks·Choose one option
Key ↓
What will Count represent at the end of execution?
1. ANumber of words in which the same vowel occurs consecutively exactly once
2. BNumber of words in which the same vowel occurs consecutively at least once
3. CNumber of words in which the same vowel occurs consecutively exactly twice
4. DNumber of words in which the same vowel occurs consecutively at least twice
Q7MSQ2 Marks·Choose all correct options
Key ↓
1. A
2. B
3. C
4. D
Q8MSQ4 Marks·Choose all correct options
Key ↓
1. A
2. B
3. C
4. D
Q9MSQ4 Marks·Choose all correct options
Key ↓
1. A
2. B
3. C
4. D
Q10MSQ4 Marks·Choose all correct options
Key ↓
1. A
2. B
3. C
4. D
5. E
Read the passage below, then answer Q11–Q12
Answer the given subquestions based on the above information.
Q11MCQ3 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q12MCQ4 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Read the passage below, then answer Q13–Q14
Based on the above data, answer the given subquestion.
Q13MCQ4 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q14MCQ4 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D

Qualifier · May 2023Qualifier

Useful Reference Data for this Paper
Q15MCQ3 Marks·Choose one option
Key ↓
The following pseudocode is executed using the "Words" dataset. What will count represent at the end of the execution?
1. ANumber of words which are adjectives and have at least two letters
2. BNumber of words which are either adjectives or have at most two letters but not both
3. CNumber of words which are adjectives or have at most two letters or both
4. DNumber of words which are not adjectives and have exactly two letters
Q16MCQ3 Marks·Choose one option
Key ↓
The following pseudocode is executed using the “Library” dataset. What will A represent at the end of execution?
1. ANumber of books written by author Kalam in English
2. BNumber of books not written by author Kalam in English
3. CNumber of English books written by authors other than Kalam
4. DNumber of books that are written by Kalam or in English or both
Q17MCQ3 Marks·Choose one option
Key ↓
The given pseudocode is executed using the “Words” dataset. Assume that vCount(X) returns the number of vowels in X.Word. What will B represent at the end of the execution?
1. AAverage letter count of words in the dataset
2. BSum of words that contain at least two vowels
3. CAverage letter count of words containing at least two vowels in the dataset
4. DAverage letter count of words containing at most two vowels in the dataset
Q18MCQ3 Marks·Choose one option
Key ↓
Consider the "Scores" dataset. What will C represent at the end of the execution?
1. ASum of Total marks of students whose Physics marks are less than the average Physics marks
2. BSum of Total marks of students whose Physics marks are more than the average Physics marks
3. CSum of Physics marks of students whose Physics marks are more than the average Physics marks
4. DSum of Physics marks of students whose Physics marks are less than the average Physics marks
Q19MCQ3 Marks·Choose one option
Key ↓
The following pseudocode is executed using the “Words” dataset. What will A represent at the end of the execution?
1. ANumber of words with at most two vowels
2. BNumber of words with at least three vowels
3. CNumber of words with at least two vowels
4. DNumber of words with exactly two vowels
Q20MSQ4 Marks·Choose all correct options
Key ↓
Consider the Player dataset given below that keeps track of the runs scored by each player in the test matches held.
1. AGoldStriker
2. BSilverStriker
3. CBronzeStriker
4. DSilverStriker and BronzeStriker
Q21MSQ4 Marks·Choose all correct options
Key ↓
The following pseudocode is executed using the “Scores” dataset. At the end of the execution, A captures the lowest Chemistry marks scored by a male student from Vellore. Choose the correct code fragment(s) to complete the pseudocode. It is a Multiple Select Question.
1. A
2. B
3. C
4. D
Q22MSQ4 Marks·Choose all correct options
Key ↓
The following pseudocode is executed using the “Olympics” dataset. At the end of the execution, A stores the number of players who are either female from India or have won the match hosted by Australia in the year 2006 or both. But the pseudocode may have mistakes. Identify all such mistakes (if any). Assume that all statements not listed in the options below are free of errors. It is a Multiple Select Question .
1. ALine 1: Incorrect initialization of A
2. BLine 5: Condition to update C is incorrect
3. CLine 8: Condition to update D is incorrect
4. DNo error in the code
Q23MSQ5 Marks·Choose all correct options
Key ↓
1. A
2. B
3. C
4. D
Q24NAT4 Marks·Write the number
Key ↓
Your answer:
Q25NAT3 Marks·Write the number
Key ↓
Let the value of X be "aeroplane". What is the value of A at the end of the execution of the pseudocode ?
Your answer:
Read the passage below, then answer Q26–Q27
Based on the above data, answer the given subquestions.
Q26MCQ3 Marks·Choose one option
Key ↓
Let unit be the number of units consumed by the consumer and cost be the amount of the bill to be paid. Choose the correct implementation to compute the cost.
1. A
2. B
3. C
4. D
Q27MCQ3 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q28MSQ5 Marks·Choose all correct options
Key ↓
The following pseudocode is executed using the "Scores" dataset. At the end of the execution, count captures the number of pairs of students who are of the same gender or are from the same city but not both. Choose the correct code fragment to complete the pseudocode. It is a Multiple Select Question.
1. A
2. B
3. C
4. D

Official Key

Master Answer Key & Explanations

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

Reveal Key

Q1A

Q2A

Q3A

Q4A

Q5A

Q6B

Q7A, B, C

Q8A, B

Q9D

Q10C

Q11A

Q12B

Q13A

Q14A

Q15C

Q16D

Q17C

Q18B

Q19B

Q20A

Q21B, D

Q22B, C

Q23A, D

Q247

Q2532

Q26C

Q27D

Q28A, C

Questions and answer keys are reproduced from the official IIT Madras BS papers. BTechi is not affiliated with IIT Madras.