Question 1

In a constellation diagram, a signal element type is represented as a
A)dot.
B)line.
C)x component.
D)y component.

Accepted Answer

In a constellation diagram, each signal element type is represented as a dot. The position of the dot in the diagram indicates the amplitude and phase of the signal element.

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.

Accepted Answer

Coherent BFSK (Binary Frequency Shift Keying) maintains phase continuity through the boundary of two signal elements, ensuring that the phase of the signal is continuous across symbol transitions.

Question 3

The Example of an analog to analog conversion is
A)radio.
B)video.
C)television.
D)internet.

Accepted Answer

Radio is an example of analog to analog conversion because it converts analog sound waves into analog electrical signals.

Question 4

AM stations are allowed carrier frequencies anywhere between
A)5-10khz.
B)50-100khz.
C)250-1000khz.
D)530- 1700 khz.

Accepted Answer

AM stations are allowed carrier frequencies in the range of 530 to 1700 kHz according to the regulations set by the Federal Communications Commission (FCC) in the United States. This frequency range is designated for AM broadcasting.

Question 5

Analog-to-analog conversion can be accomplished in
A)one way.
B)three ways.
C)two ways.
D)four ways.

Accepted Answer

Analog-to-analog conversion can be accomplished in three ways: Amplitude Modulation (AM), Frequency Modulation (FM), and Phase Modulation (PM).

Question 6

Term that is used to compose matrix of pixel is
A)number.
B)image.
C)video.
D)audio.

Accepted Answer

A matrix of pixels is used to compose an image, as images are made up of a grid of pixels.

Question 7

The Parameter that refers to recording and broadcasting of picture is
A)text.
B)audio.
C)image.
D)video.

Accepted Answer

Video refers to the recording, broadcasting, or display of moving visual images, making it the correct choice for the parameter that deals with pictures in motion.

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.

Accepted Answer

In full duplex mode, both stations can transmit and receive data simultaneously, allowing for two-way communication at the same time. This is unlike simplex mode, where communication is one-way, and half duplex mode, where communication can occur in both directions but not simultaneously.

Question 9

Each set of bit pattern is called
A)code.
B)unicode.
C)coding.
D)ascii.

Accepted Answer

Each set of bit pattern is called a code, as it represents a way to encode information, such as characters in a computer system.

Question 10

Data communications are transfer of data through some
A)transmission medium.
B)linear medium.
C)network lan.
D)protocols.

Accepted Answer

Data communications involve the transfer of data through a transmission medium, which can include wired or wireless methods. Transmission mediums are the physical or logical paths between the transmitter and receiver.

Question 11

When the system delivers data accurately then it is called
A)accuracy.
B)delivery.
C)jitter.
D)timelessness.

Accepted Answer

Accuracy refers to the degree to which the data delivered by a system matches the true or correct values. It is a measure of correctness and precision in information delivery.

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.

Accepted Answer

Full duplex mode allows for communication in both directions simultaneously, much like traffic flowing in both directions on a two-way street.

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.

Accepted Answer

The five components that make up a data communications system are message, sender, receiver, medium, and protocol. Therefore, both a protocol and a medium are essential components, making option D (both a and b) the correct answer.

Question 14

Two computers connected by an Ethernet hub are of
A)lan topology.
B)man topology.
C)wan topology.
D)intranet.

Accepted Answer

Ethernet hubs are used to connect multiple devices together in a Local Area Network (LAN) topology, allowing for communication within a limited geographical area such as a single building or campus.

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.

Accepted Answer

A single bit error means that only one bit in the data unit has changed from its original value.

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.

Accepted Answer

To guarantee the detection of up to s errors in all cases, the minimum Hamming distance in a block code must be s+1. This is because the Hamming distance between any two valid code words must be at least s+1 to ensure that even with s errors, the erroneous code word does not become a valid code word different from the original.

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

Accepted Answer

Cyclic codes are fast when implemented in both software and hardware because they can be implemented using shift registers, which are relatively simple and inexpensive to implement.

Question 18

In block coding, we divide our message into blocks, is called
A)code blocks.
B)packet blocks.
C)code words.
D)datawords.

Accepted Answer

The answer of In block coding, we divide our message...

Question 19

Find parity bit for 1001011
A)0.
B)1.
C)2.
D)none.

Accepted Answer

Parity bit is 0 if the number of 1's in the binary number is even, and 1 if the number of 1's is odd. In this case, there are 4 1's, so the parity bit is 0.

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.

Accepted Answer

In a cyclic code, the syndrome is calculated as the remainder of the polynomial division of the received code by the generator polynomial. If the syndrome is zero, it means there are no errors detected in the received code. Non-zero, infinity, and negative values indicate various conditions, but only a zero syndrome indicates no detected errors.

Quiz 3: Data Communication and Signal Processing

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

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

The Example of an analog to analog conversion is

AM stations are allowed carrier frequencies anywhere between

Analog-to-analog conversion can be accomplished in

Term that is used to compose matrix of pixel is

The Parameter that refers to recording and broadcasting of picture is

Both station can transmit and receive data simultaneously in

Each set of bit pattern is called

Data communications are transfer of data through some

When the system delivers data accurately then it is called

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

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

Two computers connected by an Ethernet hub are of

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

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

The Cyclic codes are fast when these are implemented in

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

Find parity bit for 1001011

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