11th class Computer Unit 3 MCQs
76. Concurrent flow of bits is done in:
a. Asynchronous transmission
b. Parallel transmission
c. Synchronous transmission
d. Serial transmission
77. The diameter of fiber optical cable is:
a. 62.5m
b. 62.5cm
c. 62.5mm
d. 62.5microns
78. Which of the following technique uses modulation?
a. Bandwidth
b. Baseband
c. Topology
d. Broadband
79. Which of the following devices uses parallel transmission?
a. Printer
b. Mouse
c. Light pen
d. Keyboard
80. Important property of fiber optic cable is:
a. Interference
b. Noise
c. Attenuation
d. Reflection
81. Most of data transmission over telephone lines use:
a. Digital transmission
b. Serial transmitted
c. Hybrid transmission
d. Parallel transmission
82. Data is transmitted block by block in:
a. Asynchronous transmission
b. Synchronous transmission
c. Analog transmission
d. Digital transmission
83. Select unguided media from the following:
a. Fiber optic
b. Twisted pair
c. Satellite
d. Coaxial
84. The communication channel can be divided into:
a. Three types
b. Five types
c. Two types
d. Four types
85. Typically cladding has diameter of ……… microns.
a. 124
b. 120
c. 125
d. 122
86. Start and stops bits are not required in this types of transmission:
a. Synchronous
b. Asynchronous
c. Monochromes
d. Not synchronous
87. Digital signals are commonly known as:
a. Narrowband
b. Broad band
c. Frequency
d. Baseband
88. Transmission mode is:
a. 3
b. 1
c. 4
d. 2
89. Which of the following is not a communication media?
a. Microwave
b. Twisted pair
c. Modem
d. Fiber optic
90. The communication channels can be divided into:
a. Four types
b. Two types
c. Five types
d. Three types
91. Which is an example of un-guided media:
a. Satellite
b. Fiber optic
c. Microwave
d. Coaxial
92. The transmission in which data can be received and sent simultaneously is called:
a. Half duplex
b. Simplex
c. Duplex
d. Full duplex
93. Television and radio broadcasts are examples of:
a. Simplex transmission
b. Full duplex transmission
c. Duplex transmission
d. Half duplex transmission
94. The conversion over a walkie-talkie radio is an example of:
a. Simplex transmission
b. Full duplex transmission
c. Duplex transmission
d. Half duplex transmission
95. The internet transfer of binary data in a computer uses:
a. Sequential mode
b. Parallel mode
c. Direct mode
d. Serial mode
96. Most data transmitted over telephone lines uses:
a. Direct transmission
b. Serial transmission
c. Sequential transmission
d. Parallel transmission
97. Which of the following cables consists of a single core of solid copper?
a. Fiber optic
b. UTP
c. STP
d. Coaxial
98. Which transmission type transmits data one character at a time, with the sender and receiver not synchronized with each other?
a. Asynchronous
b. Synchronous
c. Parallel
d. Ethernet
99. This type of transmission is sometimes called start/stop transmission.
a. Synchronous
b. Asynchronous
c. Parallel
d. Isochronous
100. Start/stop bits are not required in this type of transmission.
a. Monochromes
b. Asynchronous
c. Synchronous
d. Isochronous