AIOU test 5/01/2023

1) The diameter of fiber optical cable is:

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

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

4) The types.of signals can be:

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

6) The music and speech.represent:

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

8) IBM stands for:

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

10) Select unguided media from the following:

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

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

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

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

15) Computer transmit data in the form of codes.

16) An example of non-numerical data is:

17) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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

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

24) Bps is short for:

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

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

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

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

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

30) Data is transmitted block by block in: .

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

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

33) Digital signal represents a sequence of values.

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

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

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

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

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

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

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

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

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

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

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

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

46) Television and radio broadcasts are examples of:

47) ASCII code was.developed by:

48) Transmission from Earth to satellite is called:

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

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

51) Which of the following devices uses parallel transmission?

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

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

54) EBCDIC is a

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

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

57) Which of the following is NOT a coding scheme to represent data in computer?

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

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

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

61) How many characters can Unicode represcnt?

62) Digital signals are commonly known as:

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

64) Internet surfing is an example of:

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

66) Modem stands for:

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

68) BCD code is a_

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

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

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

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

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

74) Frequency is measured in:

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

76) Transmission media are usually categorized as_

77) Analog signal is measured in:

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

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

80) The communication channels can be divided into_categories:

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

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

83) Which of the following technique uses modulation?

84) An important property of fiber optic cable is:

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

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

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

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

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

90) BCD stands for:

91) Each set of bit pattern is called:

92) How many modes of data communication are available?

93) Unicode uses:

94) The typical fiber optic cable consists of very narrow strand of glass called:

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

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

97) What is another term for guided media?

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

99) What is another term for unguided media?

100) Sound,light and radio waves are examples of