Top 150+ Solved Communication Engineering MCQ Questions Answer
Q. The polarization of plane waves received from satellite is changed by
a. faraday rotation
b. gamma rays
c. helical rotation
d. distance travelled
Q. What is the input impedance to a lossless antenna, at resonance?
a. infinite
b. 0
c. resistive
d. capacitive
Q. TDMA stands for
a. time division multiple access
b. time domain multiple access
c. time division mutual access
d. time domain mutual access
Q. Which term is used when signals move from one line to another?
a. path switching
b. space switching
c. line switching
d. cross-point switching
Q. In an M-ary signalling scheme two or more bits are grouped together to form a
a. chip
b. symbol
c. byte
d. pattern
Q. Coherent PSK and non coherent orthogonal FSK have a difference of in PB.
a. 1db
b. 3db
c. 4db
d. 6db
Q. Which is easier to implement and is preferred?
a. coherent system
b. non coherent system
c. coherent & non coherent system
d. none of the mentioned
Q. Which is the main system consideration?
a. probability of error
b. system complexity
c. random fading channel
d. all of the mentioned
Q. Self information should be
a. positive
b. negative
c. positive & negative
d. none of the mentioned
Q. The unit of average mutual information is
a. bits
b. bytes
c. bits per symbol
d. bytes per symbol
Q. When probability of error during transmission is 0.5, it indicates that
a. channel is very noisy
b. no information is received
c. channel is very noisy & no information is received
d. none of the mentioned
Q. Which of the following is not an error correction and detection code?
a. block code
b. convolutional codes
c. passive codes
d. turbo codes