Top ECE Questions asked in Interviews

Top 100 ECE Questions asked in MBA Interviews

1. What is the difference between TDMA and FDMA?
2. What is a 555 timer?
3. How many memory locations can be addressed by a microprocessor with 14 address lines?
4. How do you make a memory card of a mobile phone?
5. Which type of architecture does 8085 have?
6. What will be the common test case for SMS and Mp3 player applications?
7. What is the difference between a photo-diode and a solar cell?
8. Explain negative test cases for testing mobile phones.
9. What is the exact meaning of manual testing?
10. What is the significance of "4-20 mA" signal in hart protocol?
11. How do you check the mobile battery charge status?
12. Is it possible to reverse the order of a Variable Frequency drive?
13. What do you mean by "flow of electron"?
14. 6 dB pad introduces how much attenuation?
15. Why does charging batteries take a long time? What can be done to quicken the speed?
16. The current through a resistor of 50 ohms in an AC circuit at t = 0.008 s is 65% of the peak value. The smallest possible frequency of the generator delivering the current is ________.
17. Is it possible to build an AC or DC variable-speed generator with a variable field current controlled by a signal from a torque sensor connected to the shaft of the generator (i.e., net torque = 0)?
18. How is the transmission of a signal in a computer over x number of clock cycles translated into binary?
19. When recording infrasound waves or microwaves how do they differ from one another? What is the best way to read them?
20. Is it possible to reverse the order of a Variable Frequency Drive? Ex: I want to be able to create 120V power from a variable speed engine, with at least 6kw of power.
21. What are encoders and decoders? What are the uses of these two devices? Also, write about how it works with circuit diagram.
22. Which voltage source converts chemical energy to electrical energy?
23. The removal of a non-neutral subatomic particle converts the atom into?
24. Which electronics material opposes the movement of free electrons?
25. Single-element semiconductors are characterized by atoms with how many valence electrons?
26. A diode conducts when it is forward-biased, and the anode is connected to the ________ through a limiting resistor.
27. As the forward current through a silicon diode increases, does the internal resistance increase?
28. What is the boundary between p-type material and n-type material called?
29. The bit sequence 0010 is serially entered (right-most bit first) into a 4-bit parallel out shift register that is initially clear. What are the Q outputs after two clock pulses?
30. What is a shift register that will accept a parallel input, or a bi-directional serial load and internal shift features called?
31. What is meant by parallel load of a shift register?
32. In a 6-bit Johnson counter sequence, there are a total of how many states, or bit patterns?
33. A modulus-12 ring counter requires a minimum of how many flip-flops?
34. A serial in/parallel out, 4-bit shift register initially contains all 1s. The data nibble 0111 is waiting to enter. After four clock pulses, the register contains ________.
35. A sequence of equally spaced timing pulses may be easily generated by which type of counter circuit?
36. The bit sequence 10011100 is serially entered (right-most bit first) into an 8-bit parallel out shift register that is initially clear. What are the Q outputs after four clock pulses?
37. If an 8-bit ring counter has an initial state 10111110, what is the state after the fourth clock pulse?
38. A 4-bit shift register that receives 4 bits of parallel data will shift to the ________ by ________ position(s) for each clock pulse.
39. How many clock pulses will be required to completely load serially a 5-bit shift register?
40. How is a strobe signal used when serially loading a shift register?
41. An 8-bit serial in/serial out shift register is used with a clock frequency of 150 kHz. What is the time delay between the serial input and the Q3 output?
42. What is the difference between a ring shift counter and a Johnson shift counter?
43. What is a recirculating register?
44. When is it important to use a three-state buffer?
45. Determine the output frequency for a frequency division circuit that contains 12 flip-flops with an input clock frequency of 20.48 MHz.