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Digital Electronics Unit 5 – Memory, Programmable Logic and Digital Logic Families: AKTU previous year questions

64 AKTU questions from Unit 5 (Memory, Programmable Logic and Digital Logic Families) asked in 2022–2026, tagged by marks, year and topic. In short: about 36 marks of every paper come from this unit; the most asked topic is Digital Logic Families (38 times); 54 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 5 previous year questions

  • What is noise margin in logic families? (2 marks, 2026, Digital Logic Families)
  • Compare TTL, ECL and CMOS logic families with respect to power dissipation, speed and noise immunity. (7 marks, 2026, Digital Logic Families)
  • Explain fan-in, fan-out and power dissipation in CMOS logic family. (7 marks, 2026, Digital Logic Families)
  • Differentiate between PLA and PAL. Explain how a given Boolean function can be realized using a PLA. (7 marks, 2026, PLA and PAL Devices)
  • What is fan-out? (2 marks, 2025, Digital Logic Families)
  • Enlist the advantages of EEPROM. (2 marks, 2025, RAM and ROM)
  • Which logic family consumes the least power? (2 marks, 2025, Digital Logic Families)
  • Design a full adder using a ROM. (7 marks, 2025, RAM and ROM)
  • Elaborate a comparison of CMOS, TTL and RTL logic families. (7 marks, 2025, Digital Logic Families)
  • What is Programmable Logic Arrays (PLA)? Explain their structure and working. (7 marks, 2025, PLA and PAL Devices)
  • Draw the circuit of an ECL gate and explain its operation. (7 marks, 2025, Digital Logic Families)
  • Elaborate the term PAL, PLA and FPGA with neat diagram. (7 marks, 2025, PLA and PAL Devices)

Most asked Unit 5 topics

  • Digital Logic Families – asked 38 times
  • RAM and ROM – asked 16 times
  • PLA and PAL Devices – asked 10 times

Unit 5 question pattern

  • 2-mark questions: 26 asked in 2022–2026
  • 7-mark questions: 14 asked in 2022–2026
  • 10-mark questions: 24 asked in 2022–2026
  • About 36 marks from Unit 5 in every paper
  • 54 questions were asked again in a later year

Unit 5 questions year by year

  • 2026: 4 Unit 5 questions asked (23 marks across that year's papers)
  • 2025: 10 Unit 5 questions asked (55 marks across that year's papers)
  • 2024: 7 Unit 5 questions asked (34 marks across that year's papers)
  • 2023: 28 Unit 5 questions asked (176 marks across that year's papers)
  • 2022: 15 Unit 5 questions asked (102 marks across that year's papers)