Top 150+ Solved Communication Engineering MCQ Questions Answer
Q. Half power bandwidth is also called
a. absolute bandwidth
b. null to null bandwidth
c. 3 db bandwidth
d. zero db bandwidth
Q. FM is a part of general class of modulation known as
a. angle modulation
b. phase modulation
c. amplitude modulation
d. frequency modulation
Q. Which of the following is true for a Gaussian filter?
a. large bandwidth
b. minimum isi
c. high overshoot
d. sharp cut off
Q. The method in which small amount of controlled ISI is introduced into the data stream rather than trying to eliminate it completely is called as
a. correlative coding
b. duobinary signalling
c. partial response signalling
d. all of the mentioned
Q. From digital filter we will get the output pulse as the of the current and the previous pulse.
a. summation
b. difference
c. product
d. ratio
Q. In duobinary signalling method, for M-ary transmission, the number of output obtained is
a. 2m
b. 2m+1
c. 2m-1
d. m2
Q. The method using which the error propagation in dubinary signalling can be avoided is
a. filtering
b. precoding
c. postcoding
d. none of the mentioned
Q. In precoding technique, the binary sequence is with the previous precoded bit.
a. and-ed
b. or-ed
c. exor-ed
d. added
Q. The duobinary filter, He (f) is called as
a. sine filter
b. cosine filter
c. raised cosine filter
d. none of the mentioned
Q. The method which has greater bandwidth efficiency is called as
a. duobinary signalling
b. polybinary signalling
c. correlative coding
d. all of the mentioned