# Intersymbol Interference – 1 MCQ’s

This set of Digital Communications Systems Multiple Choice Questions & Answers (MCQs) focuses on “Intersymbol Interference – 1″.

1. What is symbol rate packing?

a) Maximum possible symbol transmission rate

b) Maximum possible symbol receiving rate

c) Maximum bandwidth

d) Maximum ISI value allowed

2. A pulse shaping filter should satisfy two requirements. They are

a) Should be realizable

b) Should have the proper roll off factor

c) Should be realizable & have a proper roll-off factor

d) None of the mentioned

3. Examples of nyquist filters are

a) Root raised cosine filter

b) Raised cosine filter

c) Root raised & Raised cosine filter

d) None of the mentioned

4. If each pulse of the sequence to be detected is in _____ shape, the pulse can be detected without ISI.

a) Sine

b) Cosine

c) Sinc

d) None of the mentioned

5. Roll off factor is the fraction of

a) Excess bandwidth and absolute bandwidth

b) Excess bandwidth and minimum nyquist bandwidth

c) Absolute bandwidth and minimum nyquist bandwidth

d) None of the mentioned

6. A nyquist pulse is the one which can be represented by _____ shaped pulse multiplied by another time function.

a) Sine

b) Cosine

c) Sinc

d) None of the mentioned

7. Which value of r (roll-off factor) is considered as Nyquist minimum bandwidth case?

a) 0

b) 1

c) Infinity

d) None of the mentioned

8. Examples of double side band signals are

a) ASK

b) PSK

c) ASK & PSK

d) None of the mentioned

9. The method in which the tail of one pulse smears into adjacent symbol interval is called as

a) Intersymbol interference

b) Interbit interference

c) Interchannel interference

d) None of the mentioned

10. The minimum nyquist bandwidth for the rectangular spectrum in raised cosine filter is

a) 2T

b) 1/2T

c) T^{2}

d) 2/T