wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

IAT III MCQ : EC 8395 Communication Engineering

Total questions: 30

Worksheet time: 29mins

Name
Class
Date
1.

In digital communication system, smaller the code rate, _________are the redundant bits.

a)

less

b)

more

c)

equal

d)

unpredictable

2.

According to Shannon's theorem, it is not feasible to transmit information over the channel with ______error probability, although by using any coding technique.

a)

small

b)

large

c)

stable

d)

unpredictable

3.

In a linear code, the minimum Hamming distance between any two code words is ______minimum weight of any non-zero code word.

a)

less than

b)

greater than

c)

equal to

d)

None of the above

4.

According to linearity property, the ________ of two code words in a cyclic code is also a valid code word.

a)

sum

b)

difference

c)

product

d)

division

5.

In decoding of cyclic code, which among the following is also regarded as 'Syndrome Polynomial'?

a)

Generator Polynomial

b)

Received codeword Polynomial

c)

Quotient Polynomial

d)

Remainder Polynomial

6.

For designing of (4,1) cyclic repetition code, what would be the order of the generator polynomial g(x)?

a)

1

b)

3

c)

4

d)

5

7.

Which among the following represents the code in which codewords consists of message bits and parity bits separately?

a)

Block codes

b)

Systematic codes

c)

code rate

d)

Hamming distance

8.

Which among the following is/are the essential condition/s for a good error control coding technique?

a)

Faster coding & decoding methods

b)

Better error correcting capability

c)

Maximum transfer of information in bits/sec

d)

All of the above

9.

If the channel is bandlimited to 6 kHz & signal to noise ratio is 16, what would be the capacity of channel?

a)

15.15 kbps

b)

24.74 kbps

c)

30.12 kbps

d)

52.18 kbps

10.

While representing the convolutional code by (n,k,m), what does 'm' signify or represent in it?

a)

coded bits

b)

message bits

c)

memory order

d)

all the above

11.

During the shifting of bits in an encoder, how are the transitions in the states represented?

a)

By lines

b)

By circles

c)

By squares

d)

By summers

12.

In Viterbi's algorithm, which metric is adopted for decision making?

a)

Hamming distance

b)

Hamming bound

c)

Parity check

d)

None

13.

In Viterbi's algorithm, the selected paths are regarded as __________

a)

survivors

b)

destroyers

c)

defenders

d)

carriers

14.

The channel capacity is

a)

The maximum information transmitted by one symbol over the channel

b)

Information contained in a signal

c)

The amplitude of the modulated signal

d)

All of the above

15.

According to Shannon Hartley theorem,

a)

The channel capacity becomes infinite with infinite bandwidth

b)

The channel capacity does not become infinite with infinite bandwidth

c)

Has a tradeoff between bandwidth and Signal to noise ratio

d)

Both b and c are correct

16.

Why spread spectrum technique is inefficient for a single user?

a)

Large transmission bandwidth

b)

Small transmission bandwidth

c)

Fixed transmission bandwidth

d)

Fixed null bandwidth

17.

Which of the following is not a property of spread spectrum techniques?

a)

Interference rejection capability

b)

Multipath fading

c)

Frequency planning elimination

d)

Multiple user, multiple access interface

18.

PN sequence can be generated using sequential logic circuits.

a)

True

b)

False

19.

The period of a PN sequence produced by a linear m stage shift register cannot exceed _____ symbols.

a)

2m

b)

2^m

c)

m

d)

2^m - 1

20.

DSSS system spreads the baseband signal by ________ the baseband pulses with a pseudo noise sequence.

a)

Adding

b)

Subtracting

c)

Dividing

d)

Multiplying

21.

What is the set of possible carrier frequencies in FH-SS?

a)

Chips

b)

Hopset

c)

Symbols

d)

None

22.

In fast frequency hopping, hopping rate is less than the information symbol rate.

a)

True

b)

False

23.

Frequency division multiple access (FDMA) assigns ______ channels to _______ users.

a)

Individual, individual

b)

Many, individual

c)

Individual, many

d)

Many, many

24.

The bandwidth of FDMA channel is ______

a)

wide

b)

Narrow

c)

Large

d)

Zero

25.

__________ is based on FDMA/FDD.

a)

Cordless telephone

b)

GSM

c)

AMPS

d)

W-CDMA

26.

__________ synchronization overhead is required in TDMA due to _______ transmission.

a)

High, burst

b)

High, continuous

c)

Low, burst

d)

No, burst

27.

___________ of TDMA system is a measure of the percentage of transmitted data that contains information as opposed to providing overhead for the access scheme.

a)

Mean

b)

Efficiency

c)

Figure of Merit

d)

Signal to Noise ratio

28.

___________ problem occurs when many mobile users share the same channel.

a)

Near Far

b)

Line of sight

c)

Activation

d)

Windowing

29.

In CDMA, symbol duration is ___________ than channel delay spread.

a)

Equal

b)

Greater

c)

Slightly greater

d)

Much less

30.

All users in CDMA system uses __________ carrier frequency.

a)

Different

b)

Two

c)

Same

d)

None