11th class Computer Unit 3 MCQs
51. How many characters can Unicode represent?
a. 15,000
b. 65,536
c. 500
d. 10.000
52. BCD stands for:
a. Byte code decimal
b. Binary coded decimal
c. Bidirectional coded decimal
d. Base coded decimal
53. IBM stands for:
a. Internet bulletin machine
b. International business machine
c. International binary machine
d. Internet business machine
54. Which of the following is not a coding scheme to represent data in computer?
a. Bilateral code
b. Unicode
c. ASCII
d. EBCDIC
55. Communication between a computer and a keyboard involves ……… transmission.
a. Full-duplex
b. Simplex
c. Automatic
d. Half-duplex
56. An arrangement in which data can be received and simultaneously is called:
a. Half duplex
b. Simplex
c. Semi duplex
d. Full duplex
57. A telephone conversation is an example of:
a. Simplex transmission
b. Full duplex transmission
c. Duplex transmission
d. Half duplex transmission
58. Willkie talkie is an example of communication mode:
a. Full duplex mode
b. Simple mode
c. Parallel mode
d. Half duplex mode
59. Communication between computer and keyboard involves:
a. Full duplex
b. Simplex
c. Half duplex
d. None
60. Internet surfing is an example of:
a. Full duplex transmission
b. Simplex transmission
c. Duplex transmission
d. Half duplex transmission
61. A television broadcast is an example of:
a. Simplex
b. Full duplex
c. Mid duplex
d. Half duplex
62. Transmission permitting data to move only one way at a time is called:
a. Full duplex
b. Half duplex
c. Start/Stop
d. Simplex
63. ……… is the fastest communication mode.
a. Simple
b. Half duplex
c. Duplex
d. Full duplex
64. How many modes of data communication are available?
a. 3
b. 1
c. 4
d. 2
65. Which of the following is not a data communication mode?
a. Full duplex
b. Simplex
c. Automatic
d. Half duplex
66. The transmission that allows data to move only in one direction at a time is called:
a. Full duplex
b. Half duplex
c. Duplex
d. Simplex
67. The mode that is like a two ways street with traffic flowing in both direction at the same time is called:
a. Half duplex transmission
b. Simplex transmission
c. Duplex transmission
d. Full duplex transmission
68. Which transmission allows data to travel in both directions but only one direction at a time?
a. Full duplex
b. Simplex
c. Duplex
d. Half duplex
69. Full duplex communication is made possible by the devices known as:
a. Keyboard
b. Multiplexer
c. Mouse
d. Modem
70. Which multiplexing technique shifts each signal to a different carrier frequency?
a. DFM
b. FDM
c. TTD
d. TDM
71. The ……… is the physical path over which a message travels.
a. Single
b. Protocol
c. Medium
d. All the above
72. Which communications medium requires lines of sight?
a. Twisted pair
b. Microwave
c. Coaxial
d. Fiber optic
73. Which of the following is the insulation on a fiber optic cable?
a. Braiding
b. Sheathing
c. Housing
d. Cladding
74. During transmission the contents of the data are changed by using technique:
a. Biometric
b. Changing
c. Private data
d. Encryption
75. Concurrent flow of bits is done in:
a. Asynchronous transmission
b. Parallel transmission
c. Synchronous transmission
d. Serial transmission