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Q.1 What is AND gate? Is it a multiplier or adder?Q.2 What are digital logic levels? How logic level 1 and logic level 0 is decided

in a digital circuit?Q.3 Design a NAND gate using CMOS circuit?Q.4 Design a NOR gate using CMOS circuit?Q.5 What is V-I characteristic is a n-mos transistor?Q.6 Define cut-off, active and saturation region of a n-MOS transistor?Q.7 In which domain of MOS characteristic any digital circuit works?Q.8 In which domain of the MOS characteristic any Analog circuit works?Q.9 What is threshold voltage of any MOS transistor?Q.10 What is a latch?Q.11 What is a flip flop?Q.12 Why flip flop is a edge triggered device?Q.13 Make a timing diagram of a latch device?Q.14 Make a timing diagram of a flip flop device?Q.15 What is the setup time?Q.16 What is the hold time?

Q.17 On which parameter setup time depends?Q.18 On which parameter hold time depends?Q.19 How to fix a setup violation in a digital circuit?Q.20 How to fix a hold violation in a digital circuit?Q.21 How to fix the setup violation on silicon?Q.22 How to fix the hold violation on silicon?Q.23 What is a MUX?Q.24 Design a MUX using AND gate?8085 microprocessor

1. Which type of architecture 8085 has?2. How many memory locations can be addressed by a microprocessor with 14

address lines?3. 8085 is how many bit microprocessor?4. Why is data bus bi-directional?5. What is the function of accumulator?6. What is flag, bus?7. What are tri-state devices and why they are essential in a bus oriented

system?8. Why are program counter and stack pointer 16-bit registers?9. What does it mean by embedded system?10.What are the different addressing modes in 8085?11.What is the difference between MOV and MVI?12.What are the functions of RIM, SIM, IN?

13.What is the immediate addressing mode?14.What are the different flags in 8085?15.What happens during DMA transfer?16.What do you mean by wait state? What is its need?17.What is PSW?18.What is ALE? Explain the functions of ALE in 8085.19.What is a program counter? What is its use?20.What is an interrupt?

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21.Which line will be activated when an output device require attention fromCPU?

ELECTRONICS AND COMMUNICATIONDigital electronics

1. Flip flop and their working. What is metastable state in flip-flops?

2. Construct a d flip-flop from a t flip-flop.Differentiate b/w flip-flop and latches3.

What is totem pole?4. Draw the state graphs for a given problem like sequence generator, flip flop etc

5. Implement Boolean expressions using MUX (2 to 4,3 to 8,etc)6. Design a decade counter7. Explain internal organization of memory chips

8. What is a bit? What is CMOS? Draw the circuit of an adder using NAND gate

9. What is a Karnaugh map?10. What are the four methods to reduce a Boolean?

11. What is the difference b/w half adder and full adder?

12. What are the advantages of CMOS and TTL?What technology is used in CMOS logic?Whatare VLSI and ULSI? What is the number of components in both?

13. Explain synchronous and asynchronous counter

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Minimize the function using Quine McClusky:f=xy+xy+yz+xyz15. What is prime implicant? Which is the universal flip-flop?16. What is SRAM and DRAM? Compare the two, relative cost of the two.

17. What will happen in the case of a power failure for the above?

18. What is tristate or high impedance state?19. What are the difference between open collector output and totem pole out put?20. Find the highest clocking frequency of a digital circuit give the rise time ,fall time and

propagation delay?

Electronic Devices & circuits1. Obtain a square wave from sine wave from Zener diodes.

2. What is the difference between oscillator and multivibrator?

3. What is emitter follower? What is an opamp?4. What is the ideal gain of an opamp?5.

How is amplification possible in a transistor?

6. Classify power amplifiers7. How does a diode look(internally)? Explain the working using internal diagram8. Explain processes taking place in the depletion junction of a forward biased diode

9. What is a buffer? What is the gain of a buffer?

10. What is an oscillator?11. How do you forward bias a transistor?12. What are the practical applications of a transistor?

13. What is reverse recovery time and how does it affect a diode?

14. Draw and explain the working of a monostable vibrator using op amp15. State Theveninstheorem and Nortonstheorem. What are their applications?

16. What is the virtual ground in an op amp?

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Differentiate between intrinsic and extrinsic semiconductor

Power Electronics1. What is a thyristor and differentiate between thyristor and a diode

2. Switching action of an SCR and triggering. Draw the diagram of thyristor3. Draw an internal block diagram of a normal voltage stabilizer4. What is a reference variable?

Control Systems1. Define control systems. Why are they so important?2. What are the different types of control systems?

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3. Explain open loop with block diagram examples4. What are the advantages and drawbacks of closed loop?

5. How can you design a stable system? Explain different stability criteria6. Explain Ruth-Hurwitz rule in one sentence. What are poles and their significance?7. Is there any control system in this room(interview hall)?

8. Draw the block diagram of a control system and write its transfer function

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What is ROC? Explain transformation between s and z planes10. Differentiate between open and closed loop control systems11. What is meant by adaptive control system?

12. Find the transfer function of a given RLC circuitCommunication

1. What is packet switching and circuit switching? What is the protocol used in telephone

network?2. What is modulation? Why is needed? What are the various types?Compare AM,FM,

PM.Which waves will travel a longer distance- FM or AM and why?3. What is the mode of transmission of television signals?

4. Compare the bandwidth requirements of AM and FM

5. What do you know about antennae?6. Why is linking up frequency greater than the down linking frequency?

Modern trends and general questions1. What is a modem? Draw its internal diagram

2. What is VoIP?3. What is the most important advantage of Bluetooth?

4. What is wave studio? What is Bit rate?

5. What is the difference between mp3 and WAV formats?6. What is sampling? What is a database? What is VHDL? What is a complier?

7. What is FSF? Cite any current relevance8. Volume control in TV is logarithmic. Why?

9. What is the mathematics used in DSP and from which domain to which domain is it

converted?

10. Differentiate between macros and functions in C .Explain the booting process of a

computer.What is round robin technique of interrupt arbitration