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CSD · Sequential circuits & counters

14 questions · 47 marks · 3 papers

Answer key

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

Computer System Design

Sequential circuits & counters

Official Paper

Examination Instructions & Guidelines

Solve on notebook/paper first before checking solutions.
MCQ: Exactly 1 option is correct. Negative marking applies.
NAT: Numerical response. No negative marking.
Scientific calculator allowed for all calculations.
Official answer key is sealed at the end of this sheet.

End Term · 31 Aug 2025 (FN)End Term

Q1MCQ1 Mark·Choose one option
Asked 2 times Key ↓
A synchronous counter triggers all flipflops using a common clock signal, while an asynchronous counter triggers each flipflop using the output of the previous flipflop.
1. ATrue
2. BFalse
Q2NAT3 Marks·Write the number
Asked 2 times Key ↓
Your answer:
Q3NAT3 Marks·Write the number
Asked 2 times Key ↓
Consider a mod-12 up counter with an initial state of 0011. What will be the state of the counter after 25 clock pulses?
Your answer:
Q4NAT3 Marks·Write the number
Asked 3 times Key ↓
Your answer:
Q5NAT3 Marks·Write the number
Asked 2 times Key ↓
Consider a 9-bit Johnson counter. What is the total number of unique states it can cycle through?
Your answer:

End Term · 31 Aug 2025 (AN)End Term

Q6MCQ1 Mark·Choose one option
Asked 2 times Key ↓
A synchronous counter triggers all flipflops using a common clock signal, while an asynchronous counter triggers each flipflop using the output of the previous flipflop.
1. ATRUE
2. BFALSE
Q7NAT3 Marks·Write the number
Asked 2 times Key ↓
Your answer:
Q8NAT3 Marks·Write the number
Asked 2 times Key ↓
Consider a mod-12 up counter with an initial state of 0111. What will be the state of the counter after 25 clock pulses?
Your answer:
Q9NAT3 Marks·Write the number
Asked 3 times Key ↓
Your answer:
Q10NAT3 Marks·Write the number
Asked 2 times Key ↓
Consider a 10-bit Johnson counter. What is the total number of unique states it can cycle through?
Your answer:

Quiz 2 · 3 Aug 2025 (AN)Quiz 2

Q11MCQ5 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
5. E
Q12MCQ5 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q13NAT5 Marks·Write the number
Asked 3 times Key ↓
Your answer:
Q14NAT6 Marks·Write the number
Key ↓
Your answer:

Official Key

Master Answer Key & Explanations

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

Reveal Key

Q1A

Q23

Q3100

Q40

Q518

Q6A

Q73

Q81000

Q90

Q1020

Q11B

Q12D

Q131001

Q14111

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.