Standard Logic Devices (SLD) Questions and Answers
Standard Logic Devices (SLD) questions with answers are crucial for electronics and communication engineering students preparing for GATE, PSU, and ECE placement exams. These questions assess understanding of logic gates, flip-flops, multiplexers, and digital ICs. Practicing programming questions and answers based on logic circuits enhances both conceptual knowledge and practical application. This section provides detailed SLD questions with explanations and circuit-based problem-solving exercises that help aspirants perform confidently in technical interviews and competitive tests.
Standard Logic Devices (SLD)
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25 questions
1. A digital logic device used as a buffer should have what input/output characteristics?
- high input impedance and high output impedance
- low input impedance and high output impedance
- low input impedance and low output impedance
- high input impedance and low output impedance
3. The range of a valid LOW input is:
- 0.0 V to 0.4 V
- 0.4 V to 0.8 V
- 0.4 V to 1.8 V
- 0.4 V to 2.4 V
4. When an IC has two rows of parallel connecting pins, the device is referred to as:
- a QFP
- a DIP
- a phase splitter
- CMOS
5. Which digital IC package type makes the most efficient use of printed circuit board space?
- SMT
- TO can
- flat pack
- DIP
6. The problem of interfacing IC logic families that have different supply voltages (VCCs) can be solved by using a:
- level-shifter
- tri-state shifter
- translator
- level-shifter or translator
7. Ten TTL loads per TTL driver is known as:
- noise immunity
- power dissipation
- fanout
- propagation delay
8. Which of the following summarizes the important features of emitter-coupled logic (ECL)?
- negative voltage operation, high speed, and high power consumption
- good noise immunity, negative logic, high frequency capability, low power dissipation, and short propagation time
- slow propagation time, high frequency response, low power consumption, and high output voltage swings
- poor noise immunity, positive supply voltage operation, good low-frequency operation, and low power
9. What quantities must be compatible when interfacing two different logic families?
- only the currents
- both the voltages and the currents
- only the voltages
- both the power dissipation and the impedance
10. CMOS logic is probably the best all-around circuitry because of its:
- packing density
- low power consumption
- very high noise immunity
- low power consumption and very high noise immunity