AIOU test 5/01/2023

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

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

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

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

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

6) ASCII code was.developed by:

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

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

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

10) BCD code is a_

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

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

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

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

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

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

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

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

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

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

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

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

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

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

25) Transmission media are usually categorized as_

26) Which of the following is the fastest communication mode

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

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

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

30) Analog signal is measured in:

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

32) What is another term for unguided media?

33) Transmission from Earth to satellite is called:

34) Each set of bit pattern is called:

35) What is another term for guided media?

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

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

38) Modem stands for:

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

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

41) How many modes of data communication are available?

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

43) Digital signal represents a sequence of values.

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

45) Data is transmitted block by block in: .

46) Which of the following technique uses modulation?

47) Television and radio broadcasts are examples of:

48) Bps is short for:

49) Which of the following devices uses parallel transmission?

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

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

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

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

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

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

56) The diameter of fiber optical cable is:

57) Frequency is measured in:

58) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

63) Computer transmit data in the form of codes.

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

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

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

67) IBM stands for:

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

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

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

71) Digital signals are commonly known as:

72) An example of non-numerical data is:

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

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

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

76) EBCDIC is a

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

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

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

80) How many characters can Unicode represcnt?

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

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

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

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

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

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

87) An important property of fiber optic cable is:

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

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

90) BCD stands for:

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

92) Unicode uses:

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

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

95) The types.of signals can be:

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

97) Sound,light and radio waves are examples of

98) The music and speech.represent:

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

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