Electrical measurements MCQ Quiz Hub

Digital Communications MCQs set-1

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

1. Which circuit is called as regenerative repeaters?




2. What are the advantages of digital circuits?




3. How many bytes does a gigabyte have?




4. What is the ASCII value of space?




5. Which block or device does the data compression?




6. What is the code rate?




7. Pulse shaping is done by which block or system?




8. Equalizer is used for?




9. Source coding block is used for?




10. Which measurement considers phase as an important parameter?




11. What is the period of a signal x(t)?




12. Which of the given signals are periodic?




13. Check whether the signal is periodic or not? x(t) = cos(4t) + 2sin(8t)




14. Find the periodicity of the following signal. x(t)=cos((2π/7)t)sin((3π/5)t)




15. Find the fundamental period of 1+sin^2 (3π/5)n.




16. Which signal is called as energy signal?




17. Which signal is said to be power signal?




18. Continuous Impulse signal is a power or energy signal?




19. Discrete impulse signal is a power or energy signal?




20. A unit impulse function has?




21. Power spectral density function is a?




22. Energy spectral density defines




23. Power spectrum describes distribution of _________ under frequency domain.




24. How can power spectral density of non periodic signal be calculated?




25. What is Wiener-Khinchin theorem?




26. According to Parseval’s theorem the energy spectral density curve is equal to?




27. Spectogram is the graph plotted against?




28. Autocorrelation is a function which matches




29. Autocorrelation is a function of




30. Autocorrelation is maximum at _______




31. Autocorrelation function of periodic signal is equal to _______




32. Autocorrelation is a _______ function.




33. Autocorrelation function of white noise will have?




34. Random variables give relationship between _____




35. The distribution function of random variable is




36. The distribution function of -(infinity) and (infinity) is _____




37. The value of the probability density function of random variable is




38. Which gives the measure of randomness of the random variable?




39. Random process is a function of ______




40. A random process is called as stationary in strict sense if




41. For a stationary process, autocorrelation function depends on




42. The autocorrelation function is maximum at




43. White noise has _____ mean and ______ variance.




44. The process of data conversion along with formatting the data is called as ______




45. Formatting is the process which includes




46. Analog information is converted to digital data using




47. The process that transforms text into binary digits is called as _______




48. For the number of bits, k=1 and number of symbols, M=2 the system is called as




49. Perform the bit stream partitioning and find the 8-ary waveform for the word ‘THINK’.




50. Find the 32-ary waveform for the word ‘THINK’.