AIOU test 5/01/2023

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

2) Analog signal is measured in:

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

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

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

6) Select unguided media from the following:

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

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

9) Which of the following technique uses modulation?

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

11) Television and radio broadcasts are examples of:

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

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

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

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

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

17) An important property of fiber optic cable is:

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

19) What is another term for guided media?

20) Which of the following devices uses parallel transmission?

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

22) Digital signals are commonly known as:

23) The music and speech.represent:

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

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

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

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

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

29) How many characters can Unicode represcnt?

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

31) IBM stands for:

32) Data is transmitted block by block in: .

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

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

35) The diameter of fiber optical cable is:

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

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

38) ASCII code was.developed by:

39) What is another term for unguided media?

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

41) The communication channels can be divided into_categories:

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

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

44) EBCDIC is a

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

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

47) Sound,light and radio waves are examples of

48) Each set of bit pattern is called:

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

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

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

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

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

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

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

56) Unicode uses:

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

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

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

60) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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

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

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

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

69) BCD stands for:

70) Computer transmit data in the form of codes.

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

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

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

74) Modem stands for:

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

76) BCD code is a_

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

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

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

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

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

82) Transmission media are usually categorized as_

83) Frequency is measured in:

84) An example of non-numerical data is:

85) Internet surfing is an example of:

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

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

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

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

90) How many modes of data communication are available?

91) Transmission from Earth to satellite is called:

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

93) The types.of signals can be:

94) Digital signal represents a sequence of values.

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

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

97) Which of the following is the fastest communication mode

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

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

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