AIOU test 5/01/2023

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

2) EBCDIC is a

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

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

5) Digital signals are commonly known as:

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

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

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

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

10) Frequency is measured in:

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

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

13) Bps is short for:

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

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

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

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

18) How many characters can Unicode represcnt?

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

20) An example of non-numerical data is:

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

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

23) The diameter of fiber optical cable is:

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

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

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

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

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

29) Each set of bit pattern is called:

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

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

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

33) Which of the following is the fastest communication mode

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

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

36) How many modes of data communication are available?

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

38) Select unguided media from the following:

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

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

41) The music and speech.represent:

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

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

44) Unicode uses:

45) IBM stands for:

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

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

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

49) Modem stands for:

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

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

52) Sound,light and radio waves are examples of

53) An advantage of synchronous over asynchronous transmission is:

54) Transmission media are usually categorized as_

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

56) The communication channels can be divided into_categories:

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

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

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

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

61) What is another term for unguided media?

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

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

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

65) BCD stands for:

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

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

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

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

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

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

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

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

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

75) Internet surfing is an example of:

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

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

78) Transmission from Earth to satellite is called:

79) An important property of fiber optic cable is:

80) Television and radio broadcasts are examples of:

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

82) ASCII code was.developed by:

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

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

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

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

87) Which of the following devices uses parallel transmission?

88) BCD code is a_

89) Computer transmit data in the form of codes.

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

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

92) Digital signal represents a sequence of values.

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

94) The types.of signals can be:

95) Which of the following technique uses modulation?

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

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

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

99) What is another term for guided media?

100) Data is transmitted block by block in: .