AIOU test 5/01/2023

1) Which of the following is not a:data communication mode?

2) Which of the following coding schemes uses 4-bit code?

3) Which of the following is the fastest communication mode

4) An important property of fiber optic cable is:

5) Which medium transmits voice and data via air as high-frequency radio waves?

6) Which multiplexing technique shifts each signal to a different carrier frequency?

7) Which of the following transmission media is used in LAN?

8) Which kind of signal is mostly required by telephone lines?

9) How many characters can Unicode represcnt?

10) The process of converting analog to digital signal is known as:

11) Digital signal represents a sequence of values.

12) The chart,graph,pictures and freehand drawing are examples of:

13) The number of times a wave repeats during a specific time interval is called

14) The communication channels can be divided into_categories:

15) Internet surfing is an example of:

16) Transmission from Earth to satellite is called:

17) BCD code is a_

18) Which communications medium requires line-of-sight?

19) Data is transmitted block by block in: .

20) Full-duplex communication is made. possible by the.devices known as:

21) Which of the following coding schemes primarily.used by IBM?

22) An advantage of synchronous over asynchronous transmission is:

23) The transmission rate of modem can be measured in:

24) Select unguided media from the following:

25) Each set of bit pattern is called:

26) Transmission media are usually categorized as_

27) Which of the following converts digital signals to analog and analog to digital?

28) How many characters ASCII 8-bit code can represent?

29) Transmission from a satellite to its earth-based station is called:

30) Which value in start bit indicates that the transmission line is idle?

31) The medium in which signals travel through a cable or wire is called:

32) Which of the following type of data is used to display actions and movement?.

33) The time taken by a data signal to reach to moon and then back to earth was about:

34) Which of the following technique uses modulation?

35) Start/stop bits are not required in this type of transmission.

36) The signals produced by a computer to send over phone line must be converted to:

37) BCD stands for:

38) Bps is short for:

39) code is 7-bit or.8-bit code.

40) EBCDIC is a

41) The’transmission in which data can be received and. sent simultaneously is called:

42) .Which transmission type transmits data one character at a time

43) What binary bits are used to encode digital data?

44) The number of frequencies that can fit on a link at one time is called:

45) Which of the following cables consists of a single core of solid copper?

46) Digital signals are commonly known as:

47) Satellite transmission stations that can both send and receive messages are called:

48) What is another term for unguided media?

49) Sound,light and radio waves are examples of

50) A telephone conversation is’an example of:.

51) Which communication technique can transmit the data over long distance?

52) Which of the following can severally affect the quality of satellite transmission?

53) Analog signal is measured in:

54) Which type of modem can be added to the system unit through expansion slot?

55) Which of the following is not a communication media?

56) Which type of data consists of words,sentences and paragraphs?

57) The height of wave within a given period of time is known as:

58) The types.of signals can be:

59) The music and speech.represent:

60) Which of the following code can represent up to 65,536 symbols?

61) A type of communication that sends that uses a clock to control timing of bits being sent is called:

62) Most data .transmitted over telephone lines uses:.

63) Transmission that is used without timing signal is called:

64) The internal transfer of binary data in a computer uses mode.

65) The mode that is like a two way street with traffic flowing in both direction at the.same time is ca

66) A type of communication that sends data using flow control to synchronize data between sender

67) Which transmission allows data to travel in one direction at a time?

68) 50.This type of transmission is sometimes called start/stop transmission

69) Which of the following is the insulation on a fiber-optic cable?

70) Which is the most secure type of transmission medium?

71) Which of the following consists of two insulated copper wires twisted together?

72) How many modes of data communication are available?

73) An example of non-numerical data is:

74) The computers in wide geographical area can be efficiently connected by:

75) Modem stands for:

76) IBM stands for:

77) A fiber-optic cable’s core is measured in:

78) All of the following are guided communications media EXCEPT:

79) What is another term for guided media?

80) All of the following are elements of data communication system EXCEPT:

81) How many devices can exist between a sending and receiving host?

82) A modem allows computers to access other computers through following types of connection

83) signal is a continuous electrical signal in the form of wave.

84) The electromagnetic or light waves representing data are called:

85) How many characters ASCII 7-bit code can represent?

86) Which of the following features is provided with a modem?

87) Which of the following consists of thin glass to transmit beams of light?

88) The number of times a wave repeats during a specific time interval is called

89) Which of the following devices uses parallel transmission?

90) The process of transferring data electronically from one place to another is caled

91) The diameter of fiber optical cable is:

92) .The conversation over a walkie-talkie radio is-an example of:

93) Television and radio broadcasts are examples of:

94) Frequency is measured in:

95) ASCII code was.developed by:

96) Physical path that connects the source and receiver is known as:

97) Which modem is used to transmit data signals through air instead of cable?

98) Computer transmit data in the form of codes.

99) The conversation over a walkie-talkie radio is-an example of:

100) The process of converting a digital signal to an analog signal is called: