This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Variation Method”.
1. What is the full form of LF?
a) Line Feed
b) Link Feed
c) Line Forward
d) Link Forward
Explanation: Line feed means moving one line forward. It is basically a control character, coded upto 10 decimal places.
2. In synchronous transmission, frames are about the same length as in asynchronous transmission.
Explanation: In synchronous transmission both sender and receiver access the data according to same clock. It has no start and stop bits and thus it has more efficient. In synchronous transmission, frames are much longer than the frames in asynchronous transmission.
3. What is the full form of UART?
a) Universal Asynchronous Receiver Transmitter
b) Universal Automatic Receiver Transmitter
c) Unaltered Asynchronous Receiver Transmitter
d) Unaltered Automatic Receiver Transmitter
Explanation: UART is a computer hardware device. It is mainly used for asynchronous serial communication. It is used in modules like Bluetooth etc. It stands for Universal Asynchronous Receiver Transmitter.
4. AM spectrum consists of ________
a) Carrier frequency
b) Upper sideband
c) Lower sideband
d) Carrier frequency with both upper and lower sideband
Explanation: Spectrum of AM wave consists of a carrier with two sidebands. It is found that if carrier frequency is 5KHz then the two sidebands produced by it is 5KHz away from the carrier.
5. To maintain synchronization in synchronous transmission, __________
a) long strings of 1s and 0s must not be allowed
b) transmission must stop periodically
c) clock circuits must be precisely adjusted
d) channel must be noise free
Explanation: In synchronous transmission both sender and receiver access the data according to same clock. It has no start and stop bits and thus it has more efficient. To maintain synchronization long strings of 1s and 0s are not allowed.
6. CRC stands for __________
a) Cyclic Redundancy Check
b) Cyclic Repeat Check
c) Cyclic Redundancy Character
d) Cyclic Redundancy Character
Explanation: CRC is an error detecting code. It is generally used in digital network. It was invented by W. Wesley Peterson. CRC stands for Cyclic Redundancy Check.
7. What do you understand by the term Internet?
a) a network of networks
b) a very large client-server network
c) a very large CSMA/CD network
d) not a network
Explanation: Internet is a global network providing us a variety of information. It is a network of networks that consists of public, private, business, and government networks of local to global scope.
8. Which statement is correct about circuit-switched network?
a) each channel can carry only one data stream
b) usually uses a bus topology
c) usually uses a star topology
d) communication is half-duplex
Explanation: In circuit switching a circuit is applied for the duration of transmission. Its example is telephone. In it each channel can carry only one data stream.
9. When two or more PCs try to access a baseband network cable at the same time, it is called ________
c) excess traffic
d) multiple access
Explanation: Contention is a term of networks, used when two or more PCs try to access a baseband network cable at the same time.
10. When two PCs send data over a baseband network cable at the same time, it is called ________
c) excess traffic
d) multiple access
Explanation: Collision is a term of networks, used when two PCs send data over a baseband network cable at the same time.
Sanfoundry Global Education & Learning Series – Analog Communications.
To practice all areas of Analog Communications, here is complete set of 1000+ Multiple Choice Questions and Answers.