Logic levels and noise margins MCQs

By: Prof. Dr. Fazal Rehman | Last updated: June 19, 2025

20
Score: 0
Attempted: 0/20
Subscribe
1. : What is the typical logic level voltage for a binary ‘1’ in TTL logic?



2. : What is the typical logic level voltage for a binary ‘0’ in CMOS logic operating at 5V?



3. : In a 3.3V CMOS system, what voltage range typically defines a logic ‘1’?



4. : What is the noise margin high (NMH) in a digital circuit?



5. : What is the noise margin low (NML) in a digital circuit?



6. : Which of the following defines the logic level threshold for a binary ‘0’ in TTL logic?



7. : In a 5V CMOS logic family, what voltage is typically considered a noise margin for high logic?



8. : What is the purpose of noise margins in digital circuits?



9. : Which of the following voltage ranges would typically be considered invalid for logic levels in a 5V TTL system?



10. : What is the typical input low voltage (V_IL) threshold for a 3.3V CMOS logic circuit?



11. : For a digital system operating at 1.8V, what voltage is typically considered a logic high?



12. : Which of the following is a common cause of noise in digital circuits?



13. : What is V_OH in the context of logic levels?



14. : What is V_OL in the context of logic levels?



15. : Why is it important to consider noise margins when designing digital circuits?



16. : What is the typical V_IH (minimum input high voltage) for a 5V TTL circuit?



17. : In a digital system, what is the term for the allowable range of voltage that can be reliably interpreted as a logic level?



18. : What happens if a digital signal falls within the undefined region between logic high and logic low thresholds?



19. : In CMOS logic, why is there typically a larger noise margin compared to TTL logic?



20. : What is the significance of V_IL and V_IH in digital logic circuits?



 

MCQs of Digital Logic Design (DLD)

Introduction to Digital Systems

  1. Analog vs. Digital signals MCQs
  2. Binary numbers and arithmetic MCQs
  3. Logic levels and noise margins MCQs

Boolean Algebra

  1. Basic logic operations (AND, OR, NOT) MCQ
  2. Laws and theorems of Boolean algebra MCQ
  3. De Morgan’s Theorems MCQ
  4. Canonical forms (Sum of Products, Product of Sums) MCQ
  5. Simplification techniques (Karnaugh Maps, Quine-McCluskey method) MCQ

Combinational Logic

Logic Gates

  1. Basic gates (AND, OR, NOT) Gat MCQ
  2. Universal gates (NAND, NOR) Gat MCQs
  3. XOR and XNOR gates MCQ

Combinational Circuits

  1. Design and analysis of combinational circuits MCQ
  2. Multiplexers and Demultiplexers MCQ
  3. Encoders and Decoders MCQ
  4. Binary Adders (Half adder, Full adder) MCQ
  5. Subtractors and Arithmetic Logic Units (ALU) MCQ
  6. Comparators MCQ in DLD

Sequential Logic

Flip-Flops and Latches

  1. SR Latch, D Latch MCQ
  2. Flip-Flops (SR, D, JK, T) MCQ
  3. Characteristic equations and excitation tables MCQ
  4. Edge-triggered vs. level-triggered devices MCQ

Counters and Registers

  1. Synchronous, Asynchronous (ripple), Up/Down counters MCQs
  2. Shift registers (SIPO, PISO, SISO, PIPO) MCQs

State Machines

Finite State Machines (FSMs)

  1. Moore and Mealy machines MCQs

Memory and Programmable Logic MCQs

Memory Devices

  1. Read-Only Memory (ROM)
  2. Random Access Memory (RAM)
  3. Programmable Logic Devices (PLDs) MCQs
  4. Field Programmable Gate Arrays (FPGAs) MCQs

More MCQs of Digital Logic Design (DLD)

Computer Science Repeated MCQs Book Download

MCQs collection of solved and repeated MCQs with answers for the preparation of competitive exams, admission test and job of PPSC, FPSC, UPSC, AP, APPSC, APSC, BPSC, PSC, GOA, GPSC, HPSC, HP, JKPSC, JPSC, KPSC, KERALAPSC, MPPSC, MPSC, MPSCMANIPUR, MPSC, NPSC, OPSC, RPSC, SPSCSKM, TNPSC, TSPSC, TPSC, UPPSC, UKPSC, SPSC, KPPSC, BPSC, AJKPSC ALPSC, NPSC, LPSC, SCPSC, DPSC, DCPSC, PSC, UPSC, WVPSC, PSCW, and WPSC.

Related Posts:

All Copyrights Reserved 2025 Reserved by T4Tutorials