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WorksheetsWCM Chapter 1
Total questions: 71
Worksheet time: 36mins
Which statement is Not True for 'Digital transmission'?
Easy to Apply Encryption
Transmit Longer Distance
Maintain Data Integrity
Difficult to Multiplex
Which one is not a type of media are used in communication system?
Optical Media
Wood pole
Free Space (Air)
Electrical Conductors
Electrical Conductors
Full-Duplex Link
Simplex Link
Duplex Link
Half-Duplex Link
'Analogue' transmission conveys voice, data, image or video information using an information signal that is _____________________.
continuously varying
constant frequency
constant voltage
discretely varying
Which of the following 'Multiple-Access' scheme share the same frequency channel by dividing the signal into different time slots?
FDMA
TDMA
CDMA
SDMA
Which of the following is TRUE about 'Digital Transmission?
Maintains Data Integrity
Transmit shorter distance
Difficult to Multiplex
Difficult to apply Encryption
All electronic communication systems have a 'Transmitter', a '____________' (Medium), and a 'Receiver'.
Visitor Channel
Home Channel
Communication Channel
Passing Channel
Which of the following is TRUE about 'Parallel Transmission'?
'Parallel Transmission' is slower than 'Serial Transmission'.
'Parallel Transmission' is suitable for long distance communication.
'Parallel Transmission' uses Byte-Wide transmission.
'Parallel Transmission' does not suffer from 'Skew' problems.
Which of the following is NOT an element of a 'Communication Model'?
Communication Channel
Communication Signal
Transmitter
Receiver
Which of the following statements describe the 'Communication Link' where information travels in one direction only.
Simplex
Half-Duplex
Full-Duplex
Multiplex
Which of the following is TRUE, when device 1 and device 2 communication is half-duplex?
Device 1 can only transmit to device 2, and can't received from it.
Device 1 can only transmit or receive from device 2 at the same time.
evice 1 can transmit and receive from device 2 at the same time.
Device 1 can only receive from device 2 and can't transmit to it.
Which of the following statement is correct for full-duplex communication for device 1 and device 2?
Device 1 can transmit and receive from device 2 at the same time.
Device 1 can only transmit or received from device 2 at the same time.
Device 1 can only transmit to device 2, but can't receive from it.
Device 1 can only receive from device 2, but can't tranmit to it.
Which of the following is an example of simplex communication?
TV station transmit program to the TV
Students uses whatsapp to communicated?
Google classroom was used for teaching
Kahoot Quiz was implement during the lesson
Which of the following is an example of half-duplex communication?
Walkie-Talkie
Telephony System
TV-receiver
Radio broadcasting
Which of the following is an example of full duplex communication?
MS teams lesson
radio stations
Military radio communication
keyboard and monitor
Digital signals is represent in __ bits and ___ bits.
one, zero
high, low
multiple, single
regular, irregular
ADC is used for ____
conversion from analog to digital
conversion of alternate current (AC) to direct current (DC)
conversion of digital to analog
conversion of direct current(DC) to alternate current (AC)
The disadvantages of digital transmission are ____
costly to convert from analogue system
higher bandwidth & system requirement
difficult to apply encryption
more sensitive to noise and impairments
The ____ transmission is faster then ____ transmission.
parallel, serial
serial, parallel
simplex, duplex
half duplex, parallel
The ___ transmission use more wire compare to ____ transmission
parallel, serial
serial, parallel
data, digital
simplex, duplex
Asynchronous transmission used ____ to identify the data transmitted.
"start and stop"
clock
one and zero
multiple access
What is "FDMA"?
the whole frequency band is divided into small frequency band
share the same frequency channel by dividing the signal into different time slot
employ spread-spectrum technology and special coding scheme
divides the geographical spece into smaller space
Which of the following is NOT part of the multiple access type?
CDMA
TDMA
FDMA
ADMA
Which of the following are type of multiple access?
SDMA
CDMA
KDMA
PDMA
2.4GHz uses 13 channel is an example of ______
FDMA
TDMA
CDMA
SDMA
Which of the following is not a component of the electronic communication model?
Transmitter
Communication Channel
Receiver
Medium
What is the function of a transmitter in electronic communication systems?
Convert information signals to a suitable signal for transmission
Accept transmitted signals from the communication channel
Deliver electronic signals to the receiver
Regulate the amount of noise in the communication channel
Which of the following is not a type of communication channel used in electronic communication systems?
Electrical conductors
Optical media
Magnetic media
Free space (air)
What is a receiver in electronic communication systems?
A collection of electronic components that deliver electronic signals to the transmitter
A medium that carries electronic signals from the transmitter to the communication channel
A collection of electronic components that convert transmitted signals back to a form understandable by humans
A regulator that controls the amount of noise in the communication channel
What is a communication channel in electronic communication systems?
The medium by which an electronic signal is sent from one point to another
A collection of electronic components that accept transmitted signals from the communication channel
A medium that carries electronic signals from the transmitter to the receiver
A regulator that controls the amount of noise in the communication system
What is noise in electronic communication systems?
Intentionally added signal in the communication channel to improve the quality of the transmitted information
The medium that carries electronic signals from the transmitter to the receiver
Unintentionally added interference in the communication channel that degrades or interferes with the transmitted information
The regulator that controls the amount of noise in the communication system
Which of the following is NOT required for an electronic communication system?
A transmitter
A communication channel
A mobile phone
A receiver
What is the function of a transmitter in an electronic communication system?
To receive electronic signals
To convert information signals to a suitable signal for transmission
To accept transmitted signal
None of the mention
Which component of an electronic communication system accepts transmitted signals?
Transmitter
Medium
Receiver
None of the mention
What types of media are used in communication systems?
Electrical Conductors
Optical Media
Free Space (Air)
All of the mention
What should be A?
Information Source
Message
Information Destination
Channel
What should be C?
Transmitter
Receiver
Channel
Message
What should be G?
Receiver
Transmitter
Message
Channel
Which of the following is an example of simplex communication?
Telephony system
Walkie-talkie
Radio broadcasting
Mobile phone
Which of the following is needed to support two-way communication in a duplex link?
Only a transmitter at one end
Only a receiver at one end
Both a transmitter and a receiver at both ends
Both a transmitter and a receiver at one end
What is an example of full-duplex communication?
Walkie-talkie
Radio broadcasting
Telephony system
TV broadcasting
Which of the following links requires only one transmission frequency in wireless transmission?
Full-duplex link
Half-duplex link
Duplex link
Simplex link
What is the minimum number of transmission frequencies required for full-duplex communication in wireless transmission?
One
Two
Three
Four
In wireless transmission, how many transmission frequencies are needed in ‘Half-Duplex’ communication?
One
Two
Three
Four
Which type of transmission conveys information in a continuously varying signal?
Digital
Analog
Both
None
What is the name of the device used to convert analog signal into digital signal?
Analog Signal Converter
Digital Signal Converter
ADC
DAC
What is the name of the device used to convert digital signal into analog signal?
Analog Signal Converter
Digital Signal Converter
ADC
DAC
Which of the following is NOT an advantage of digital transmission over analog transmission?
Maintain Data Integrity
Easy to Multiplex
Transmit Longer Distance
Less Sensitive to Noise & Impairments
What is the main disadvantage of digital transmission?
Costly to convert from Analog system
Difficult to apply encryption
Limited to shorter distances
Less data integrity
Which of the following is NOT a reason why digital transmission is widely used?
Easier to apply encryption
Maintains data integrity
Less sensitive to noise and impairments
More cost effective
What is the main difference between analogue and digital transmission?
Analogue is a series of discrete pulses, whereas digital is continuously varying.
Analogue is continuously varying, whereas digital is a series of discrete pulses.
Both analogue and digital are continuously varying.
Both analogue and digital are a series of discrete pulses.
Why must analogue signals be converted into digital signals before digital transmission?
To make the transmission more sensitive to noise and impairments.
To make it easier to integrate voice, video and data.
To make it easier to hack encryption.
To enable the transmission to travel longer distances without repeater.
Which of the following is an advantage of digital transmission?
More cost-effective than analogue transmission.
Less sensitive to noise and impairments.
No need for a digital-to-analogue converter.
Does not require as much bandwidth or system requirements as analogue transmission.
Which of the following is a method of transmitting data from one place to another?
Parallel Transmission
Serial Transmission
Both mention
None of the mention
How many bits are typically sent at a time in Parallel Transmission?
1
4
8
16
What is the major disadvantage of Parallel Transmission?
It is slower than Serial Transmission
It is used for longer distance transmission
Each wire has its own unique characteristics and so each channel is delaying each pulse by a different amount
None of the mention
Which of the following is widely used and is the predominant method of transferring information in data communications?
Parallel Transmission
Serial Transmission
Both Mention
None Mention
Which method of transmission is used for longer distance transmission due to the absence of 'skew' problems?
Parallel Transmission
Serial Transmission
Both mention
None of the mention
What are the two basic methods of transmitting data from one place to another?
Simple and Complex Transmission
Fast and Slow Transmission
Parallel and Serial Transmission
Wireless and Wired Transmission
Why is parallel transmission limited to shorter distance?
Each wire has its own unique characteristics, so each channel is delaying each pulse by a different amount.
The transmission rate is slower than serial transmission.
It is not compatible with modern technology.
It requires more expensive hardware.
Which type of transmission technique is known for its low data rate?
Synchronous transmission
Asynchronous transmission
Both types have the same data rate
None of the mention
Asynchronous transmission uses what type of signal to separate characters from each other?
Clock signal
Start and stop signal
Synchronization signal
Data signal
What type of transmission is used for longer bit sequence data due to its higher efficiency?
Synchronous transmission
Asynchronous transmission
Both types have the same efficiency
None of the mention
What type of transmission uses a clock to synchronize all parts of the system?
Asynchronous transmission
Synchronous transmission
Both types use a clock signal
None of the mention
What is the main disadvantage of using asynchronous transmission?
High efficiency
Low data rate
Requires special synchronization characters
None of the mention
What type of transmission is most widely used by personal computers to provide connectivity to printers, modems, and fax machines?
Synchronous transmission
Asynchronous transmission
Both types are equally used
None of the mention
What is multiplexing?
The process of transmitting several channels separately without interference.
The process of transmitting channels in the same frequency.
The process of receiving channels in the same frequency.
The process of receiving channels separately without interference.
What is the aim of multiplexing?
To share an inexpensive resource.
To transmit several channels in the same frequency.
To receive several channels in the same frequency.
To transmit several channels separately without interference.
What is an analogy to the problem of multiple access?
A room in which people wish to talk to each other simultaneously.
A house in which people wish to talk to each other simultaneously.
A car in which people wish to talk to each other simultaneously.
A building in which people wish to talk to each other simultaneously.
What is the difference between FDMA and TDMA?
FDMA divides frequency and TDMA divides time.
FDMA divides time and TDMA divides frequency.
FDMA divides frequency and TDMA divides space.
FDMA divides space and TDMA divides frequency.
Which multiple access scheme is compatible with any multiple access scheme such as TDMA, FDMA and CDMA?
SDMA
CDMA
FDMA
TDMA
