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Electrical measurements MCQ Quiz Hub

Digital Communications MCQs set-13

Choose a topic to test your knowledge and improve your Electrical measurements skills

1. Which method is efficient?




2. The preamble consists of




3. Each satellite has ______ transponders.




4. In spread spectrum technique, the desired signal is multiplied _____ and interference signal is multiplied _____




5. Uncertainty in the delay measurement is _______ to rise time of the pulse.




6. Which has a lesser average packet delay?




7. The maximum waiting time before transmission of a packet is




8. CDMA is




9. Frequency modulation technique involves




10. Which needs precise time coordination?




11. A local area network can be used to interconnect




12. LAN uses _________ cables.




13. The maximum packet size of Ethernet is




14. The minimum packet size of Ethernet is




15. The interface between the ring and the stations are passive.




16. Bit stuffing is done by inserting _____, after ____ consecutive ones.




17. As channel capacity increases, channel throughput




18. In Aloha technique, the re-transmission takes place immediately.




19. In which technique, packet size are constant?




20. For a throughput of value less than 0.20, which has less average delay?




21. For a throughput value of 0.20 to 0.67, which has less average delay?




22. Binary tree search is used for




23. Which method is better suited for large population?




24. For a higher throughput value which method works efficiently?




25. INTELSAT II and III operates their TWTA in




26. As the number of carriers, the capacity of the transponder




27. As the number of carriers increases, the number of guard bands




28. TWTA which operates in the linear region




29. Which method is better when traffic is heavy?




30. SPADE uses




31. SPADE is a




32. In SPADE system, the carrier is done based on




33. Which is more costlier?




34. Which technique needs precise synchronization?




35. Which is based on orthogonality?




36. Which provides constant delay?




37. Example of reservation system is




38. Reservation systems are useful when




39. In slotted system, access is




40. In CSMA, collision window is _____ to cable length.




41. Which isolates collision?




42. Minimum packet size increases as




43. Which are non orthogonal multiplexing?




44. Companding is used to




45. TDM is used to




46. Which has greater bandwidth?




47. Which has lower noise immunity?




48. TDM can be employed to transmit channels having unequal bandwidth,




49. Using sampling theorem, analog signal cannot be reconstructed.




50. Which maintains better fidelity?