Deck 3: Data Communication and Signal Processing

Question 1

In a constellation diagram, a signal element type is represented as a

A)dot.
B)line.
C)x component.
D)y component.

Answer 1

dot.

Question 2

The Term that refers to phase continues through boundary of two signal elements is

A)non coherent bfsk.
B)coherent bfsk.
C)binary ask.
D)multilevel ask.

Answer 2

coherent bfsk.

Question 3

The Example of an analog to analog conversion is

A)radio.
B)video.
C)television.
D)internet.

Answer 3

radio.

Question 4

AM stations are allowed carrier frequencies anywhere between

A)5-10khz.
B)50-100khz.
C)250-1000khz.
D)530- 1700 khz.

Question 5

Analog-to-analog conversion can be accomplished in

A)one way.
B)three ways.
C)two ways.
D)four ways.

Question 6

Term that is used to compose matrix of pixel is

A)number.
B)image.
C)video.
D)audio.

Question 7

The Parameter that refers to recording and broadcasting of picture is

A)text.
B)audio.
C)image.
D)video.

Question 8

Both station can transmit and receive data simultaneously in

A)simplex mode.
B)half duplex mode.
C)full duplex mode.
D)none of above.

Question 9

Each set of bit pattern is called

A)code.
B)unicode.
C)coding.
D)ascii.

Question 10

Data communications are transfer of data through some

A)transmission medium.
B)linear medium.
C)network lan.
D)protocols.

Question 11

When the system delivers data accurately then it is called

A)accuracy.
B)delivery.
C)jitter.
D)timelessness.

Question 12

The mode that is like a two way street with traffic flowing in both direction simultaneously is

A)simplex.
B)full duplex.
C)half duplex.
D)none of above.

Question 13

Five components that make up a data communications system are message, sender, receiver, and

A)protocol.
B)medium.
C)connecting device.
D)both a and b.

Question 14

Two computers connected by an Ethernet hub are of

A)lan topology.
B)man topology.
C)wan topology.
D)intranet.

Question 15

How many bits in data unit has changed in single bit error

A)only 1.
B)two bits.
C)three bits.
D)four bits.

Question 16

To guarantee detection of up to s errors in all cases, minimum hamming distance in a block code must be

A)s.
B)s+1.
C)s-1.
D) 0.

Question 17

The Cyclic codes are fast when these are implemented in

A)software.
B)hardware.
C)local area network.
D) Both a and b

Question 18

In block coding, we divide our message into blocks, is called

A)code blocks.
B)packet blocks.
C)code words.
D)datawords.

Question 19

Find parity bit for 1001011

A)0.
B)1.
C)2.
D)none.

Question 20

In a cyclic code, decoder is failed to detect any error, when syndrome is

A)zero.
B)non zero.
C)infinity.
D)negative value.

Question 21

What is maximum effect of a 2-ms burst of noise on data transmitted for 12 kbps

A)2 bits.
B)4 bits.
C)16 bits.
D)24 bits.

Question 22

Divisor line and XOR are missing if corresponding bit in divisor is

A)0.
B)1.
C)10.
D)11.

Question 23

Unsigned representation of numbers by one's complement can represent

A)positive number.
B)negative number.
C)positive and negative numbers.
D)infinite numbers.