Thursday, April 21, 2011

DRDO ENGINEERS EXAM 2011 QUESTIONS



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?

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

22. Write the truth table for full adder and implement it in NAND gate only.

23. What's the difference between looping 0s and 1s in K map?

24. Difference between microprocessor and micro controller

25. Microprocessors you are familiar with

26. How will you send and receive data to a micro-processor? (One method is I/O mapped I/O which is the other one?)

27. Radar range equation?

28. Does the radar range depend upon the frequency of the signal transmitted?

29. What is Doppler shift? What is its importance?

30. I will make two fuzzy statements. Pencil is long. Table is long. What is the term long signify?

31. What is a membership function?

32. What are the design criteria for very low frequency amplifier?

33. Can you measure distance with the help of CW radar? If so how?

34. How will you design a stable oscillator? (Not with crystal oscillator because temperature affects it)

35. You have designed an amplifier. After few days it is found that its gain have changed. What might be the reason?

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