Telephonic Interview Questions Level 1 1. 2. 3. 4. 5. 6. 7. 8. What are different categories of antennas? What is handover and what are its types? What is ionospheric bending? What is CDMA? Explain the concept of frequency re-use. What is Bluetooth? What are applications of DSP? Explain zener breakdown and avalanche breakdown? 9. What logic function is obtained by adding an inverter to the output of an AND 10. What is cut off frequency? 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. gate? What is a base station? What is crosstalk? What is Barkhausen criteria? Why capacitor allow AC but not DC? What is difference between latch and flip-flop? What is the value of a resistor with colour bands: red-red-red-gold? Mention some of the linear applications of op – amps? Mention the characteristics of an ideal op-amp? Define input offset voltage. What is a LAN? What are routers? What is the job of the Network Layer under the OSI reference model? How many layers are there under TCP/IP? What is the function of the OSI Session Layer? What are MAC addresses? What is session initiation protocol? Give one example of it? 27. 28. 29. 30. What is peer to peer? What is the difference between a hub and a switch? What is client/server? What is mesh topology? Level 2 31. 32. 33. 34. 35. 36. 37. 38. 39. Which type of modulation is used in TV transmission? What is meant by pre-emphasis and de-emphasis? Which semiconductor device is used as a voltage regulator and why? How many satellites are required to cover the earth? What is Instrumentation Amplifier (IA)? Why we can’t store AC in Batteries instead of DC? What is the difference between a battery and a capacitor? Why A.C needs more insulation than D.C at same voltage level? Explain the statement that induction motor is fundamentally a Transformer? 40. What is the difference between real ground and virtual ground? 42. What is the maximum data rate supported by a GSM system? 41. What is a Schmitt trigger? 43. What do you mean by ARFCN? 44. What is VPN? 45. Mention some of the non – linear applications of op-amps? 46. You need to connect two computers for file sharing. Is it possible to do this without using a hub or router? 47. What protocols fall under the TCP/IP Internet Layer? 48. What is IPv6? 49. Differentiate between transducer and transponder. 50. What is the difference between Diplexer and Duplexer?