Question 1

The data efficiency of a system is the percentage of the total communications time spent transmitting data bits.

Accepted Answer

A) True 
 B)False

Question 2

Synchronous data formats include all of the following except_________.

Accepted Answer

A)  duplex cycling 
B)  Manchester encoding 
C)  return to zero 
D)  non- return to zero 
A)  duplex cycling 
B)  Manchester encoding 
C)  return to zero 
D)  non- return to zero

Question 3

A simple way to convert parallel to serial data is to use _________.

Accepted Answer

A)  a FIFO memory 
B)  a parallel in serial out shift register 
C)  a full- adder 
D)  a binary to hexadecimal converter 
A)  a FIFO memory 
B)  a parallel in serial out shift register 
C)  a full- adder 
D)  a binary to hexadecimal converter

Question 4

The simplest connection between a sending device and receiving device is_________.

Accepted Answer

A)  a coaxial cable 
B)  a fiber optic cable 
C)  a wire 
D)  a shielded twisted pair 
A)  a coaxial cable 
B)  a fiber optic cable 
C)  a wire 
D)  a shielded twisted pair

Question 5

Frequency shift keying is a type of encoding in which a digital signal modulates the frequency of a higher frequency sine wave is frequency shift keying.

Accepted Answer

A) True 
 B)False

Question 6

Communication in the infrared region can be _________.

Accepted Answer

A)  multimode 
B)  dispersed 
C)  single- mode 
D)  diffused 
A)  multimode 
B)  dispersed 
C)  single- mode 
D)  diffused

Question 7

Most signal loss in coaxial cable or twisted pair media is because of resistance.

Accepted Answer

A) True 
 B)False

Question 8

ASK stands for asynchronous serial keying.

Accepted Answer

A) True 
 B)False

Question 9

Bit- interleaved time division multiplexing uses a start and stop bit to synchronize the multiplexing and demultiplexing of transmitted data.

Accepted Answer

A) True 
 B)False

Question 10

Optical fiber cables can support faster data rates than copper conductors.

Accepted Answer

A) True 
 B)False

Question 11

The ways in which radio frequency and microwave signals propagate through the atmosphere include all of the following except _________.

Accepted Answer

A)  stratospheric 
B)  ground wave 
C)  line- of- sight 
D)  ionospheric 
A)  stratospheric 
B)  ground wave 
C)  line- of- sight 
D)  ionospheric

Question 12

The most common type of coaxial connector is the_________.

Accepted Answer

A)  banana jack 
B)  stereo phono jack 
C)  alligator clip 
D)  BNC connector 
A)  banana jack 
B)  stereo phono jack 
C)  alligator clip 
D)  BNC connector

Question 13

For a return to zero data format _________.

Accepted Answer

A)  a single pulse during a bit time represents a 0 and absence of a pulse represents a 1 
B)  a change during a bit time represents a 1 and no change represents a 0 
C)  a single pulse during a bit time represents a 1 and absence of a pulse represents a 0 
D)  the format is meaningless because there is no return to zero data format 
A)  a single pulse during a bit time represents a 0 and absence of a pulse represents a 1 
B)  a change during a bit time represents a 1 and no change represents a 0 
C)  a single pulse during a bit time represents a 1 and absence of a pulse represents a 0 
D)  the format is meaningless because there is no return to zero data format

Question 14

Shielded twisted pair cable provides more protection from _________ than unshielded twisted pair cable.

Accepted Answer

A)  SNR 
B)  STP 
C)  PSK 
D)  EMI 
A)  SNR 
B)  STP 
C)  PSK 
D)  EMI

Question 15

In pulse position modulation _________.

Accepted Answer

A)  the position of a pulse relative to a reference signal varies based upon the value of the modulating signal 
B)  the position of a pulse relative to a reference signal varies based upon its amplitude relative to the amplitude of the modulating signal 
C)  the frequency of a pulse waveform varies based upon the position of the zero- crossing of the modulating signal relative to a reference signal 
D)  the amplitude of a pulse varies based upon its position relative to the zero- crossing of the modulating signal 
A)  the position of a pulse relative to a reference signal varies based upon the value of the modulating signal 
B)  the position of a pulse relative to a reference signal varies based upon its amplitude relative to the amplitude of the modulating signal 
C)  the frequency of a pulse waveform varies based upon the position of the zero- crossing of the modulating signal relative to a reference signal 
D)  the amplitude of a pulse varies based upon its position relative to the zero- crossing of the modulating signal

Question 16

The fiber optic core for single- mode propagation is __________.

Accepted Answer

A)  much smaller in diameter than in multimode propagation 
B)  about the same diameter as in multimode propagation 
C)  much larger in diameter than in multimode propagation 
D)  somewhat larger in diameter than in multimode propagation 
A)  much smaller in diameter than in multimode propagation 
B)  about the same diameter as in multimode propagation 
C)  much larger in diameter than in multimode propagation 
D)  somewhat larger in diameter than in multimode propagation

Question 17

A modulation method used to convert the amplitude of an analog signal to digital values is pulse amplitude modulation.

Accepted Answer

A) True 
 B)False

Question 18

Digital data transmission channels can be all of the following except_________.

Accepted Answer

A)  wireless 
B)  wire cable 
C)  optical fiber 
D)  thermal transmission 
A)  wireless 
B)  wire cable 
C)  optical fiber 
D)  thermal transmission

Question 19

Optical fiber is used when a data transmission system requires a cheap transmission medium.

Accepted Answer

A) True 
 B)False

The data efficiency of a system is the percentage of the total communications time spent transmitting data bits.

Synchronous data formats include all of the following except_________.

A simple way to convert parallel to serial data is to use _________.

The simplest connection between a sending device and receiving device is_________.

Frequency shift keying is a type of encoding in which a digital signal modulates the frequency of a higher frequency sine wave is frequency shift keying.

Communication in the infrared region can be _________.

Most signal loss in coaxial cable or twisted pair media is because of resistance.

ASK stands for asynchronous serial keying.

Bit- interleaved time division multiplexing uses a start and stop bit to synchronize the multiplexing and demultiplexing of transmitted data.

Optical fiber cables can support faster data rates than copper conductors.

The ways in which radio frequency and microwave signals propagate through the atmosphere include all of the following except _________.

The most common type of coaxial connector is the_________.

For a return to zero data format _________.

Shielded twisted pair cable provides more protection from _________ than unshielded twisted pair cable.

In pulse position modulation _________.

The fiber optic core for single- mode propagation is __________.

A modulation method used to convert the amplitude of an analog signal to digital values is pulse amplitude modulation.

Digital data transmission channels can be all of the following except_________.

Optical fiber is used when a data transmission system requires a cheap transmission medium.

Introductory Concepts

Number Systems, Operations, and Codes

Logic Gates

Boolean Algebra and Logic Simplification

Combinational Logic Analysis

Functions of Combinational Logic

Latches, Flip-Flops, and Timers

Shift Registers

Counters

Programmable Logic

Data Storage

Signal Conversion and Processing

Data Processing and Control

Integrated Circuit Technologies

Filters

Exam 13: Data Transmission

The data efficiency of a system is the percentage of the total communications time spent transmitting data bits.

Synchronous data formats include all of the following except_________.

A simple way to convert parallel to serial data is to use _________.

The simplest connection between a sending device and receiving device is_________.

Frequency shift keying is a type of encoding in which a digital signal modulates the frequency of a higher frequency sine wave is frequency shift keying.

Communication in the infrared region can be _________.

Most signal loss in coaxial cable or twisted pair media is because of resistance.

ASK stands for asynchronous serial keying.

Bit- interleaved time division multiplexing uses a start and stop bit to synchronize the multiplexing and demultiplexing of transmitted data.

Optical fiber cables can support faster data rates than copper conductors.

The ways in which radio frequency and microwave signals propagate through the atmosphere include all of the following except _________.

The most common type of coaxial connector is the_________.

For a return to zero data format _________.

Shielded twisted pair cable provides more protection from _________ than unshielded twisted pair cable.

In pulse position modulation _________.

The fiber optic core for single- mode propagation is __________.

A modulation method used to convert the amplitude of an analog signal to digital values is pulse amplitude modulation.

Digital data transmission channels can be all of the following except_________.

Optical fiber is used when a data transmission system requires a cheap transmission medium.

Introductory Concepts

Number Systems, Operations, and Codes

Logic Gates

Boolean Algebra and Logic Simplification

Combinational Logic Analysis

Functions of Combinational Logic

Latches, Flip-Flops, and Timers

Shift Registers

Counters

Programmable Logic

Data Storage

Signal Conversion and Processing

Data Processing and Control

Integrated Circuit Technologies

Filters