1) Which of the following technique uses modulation?

2) An example of non-numerical data is:

3) ASCII code was.developed by:

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

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

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

7) Digital signal represents a sequence of values.

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

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

10) Modem stands for:

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

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

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

14) Digital signals are commonly known as:

15) The types.of signals can be:

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

17) IBM stands for:

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

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

20) BCD code is a_

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

22) Television and radio broadcasts are examples of:

23) Bps is short for:

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

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

26) Internet surfing is an example of:

27) EBCDIC is a

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

29) Which of the following devices uses parallel transmission?

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

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

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

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

34) Data is transmitted block by block in: .

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

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

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

38) Analog signal is measured in:

39) Computer transmit data in the form of codes.

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

41) BCD stands for:

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

43) Which of the following is the fastest communication mode

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

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

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

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

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

49) The communication channels can be divided into_categories:

50) An important property of fiber optic cable is:

51) Unicode uses:

52) What is another term for unguided media?

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

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

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

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

57) Frequency is measured in:

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

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

60) Select unguided media from the following:

61) What is another term for guided media?

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

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

64) Each set of bit pattern is called:

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

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

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

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

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

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

71) How many characters can Unicode represcnt?

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

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

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

75) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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

81) The diameter of fiber optical cable is:

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

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

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

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

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

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

88) How many modes of data communication are available?

89) Transmission media are usually categorized as_

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

91) The music and speech.represent:

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

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

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

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

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

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

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

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

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