Digital Electronics Unit 4 – Synchronous and Asynchronous Sequential Circuits: AKTU previous year questions
43 AKTU questions from Unit 4 (Synchronous and Asynchronous Sequential Circuits) asked in 2022–2026, tagged by marks, year and topic. In short: about 27 marks of every paper come from this unit; the most asked topic is Synchronous Circuit Analysis (15 times); 32 questions came back in a later year. The latest ones are listed below; on the page you can filter them by 2-mark or long questions, topic and repeats.
Unit 4 previous year questions
- What is a hazard in digital circuits? (2 marks, 2026, Hazards in Digital Circuits)
- Explain the steps involved in state assignment of synchronous sequential circuits. (7 marks, 2026, Synchronous Circuit Analysis)
- Explain race conditions in asynchronous sequential circuits. (7 marks, 2026, Asynchronous Circuit Design)
- Explain the complete design procedure of a synchronous sequence detector using state diagram and state table. (7 marks, 2026, Synchronous Circuit Design Procedure)
- What are essential hazards? (2 marks, 2025, Hazards in Digital Circuits)
- What is race-free state assignment? Why is it necessary in asynchronous sequential circuits? (7 marks, 2025, Asynchronous Circuit Design)
- Explain Mealy machine and Moore machine. Also state the differences between Mealy and Moore machine. (7 marks, 2025, Synchronous Circuit Analysis)
- What is the significance of state assignment? List the different techniques for state assignment. (7 marks, 2025, Synchronous Circuit Analysis)
- Explain the differences between synchronous and asynchronous sequential circuits with examples. (7 marks, 2025, Asynchronous Circuit Analysis)
- Differentiate between Synchronous and Asynchronous sequential circuits. (2 marks, 2023, Asynchronous Circuit Analysis)
- Illustrate the term sequential logic. (2 marks, 2023, Synchronous Circuit Analysis)
- What are Static and Dynamic Hazards? (2 marks, 2023, Hazards in Digital Circuits)
Most asked Unit 4 topics
- Synchronous Circuit Analysis – asked 15 times
- Synchronous Circuit Design Procedure – asked 9 times
- Asynchronous Circuit Analysis – asked 8 times
Unit 4 question pattern
- 2-mark questions: 12 asked in 2022–2026
- 7-mark questions: 7 asked in 2022–2026
- 10-mark questions: 24 asked in 2022–2026
- About 27 marks from Unit 4 in every paper
- 32 questions were asked again in a later year
Unit 4 questions year by year
- 2026: 4 Unit 4 questions asked (23 marks across that year's papers)
- 2025: 5 Unit 4 questions asked (30 marks across that year's papers)
- 2023: 19 Unit 4 questions asked (158 marks across that year's papers)
- 2022: 15 Unit 4 questions asked (102 marks across that year's papers)