1) Digital signal represents a sequence of values.

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

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

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

5) The types.of signals can be:

6) Computer transmit data in the form of codes.

7) BCD stands for:

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

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

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

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

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

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

14) The music and speech.represent:

15) Unicode uses:

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

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

18) An example of non-numerical data is:

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

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

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

22) EBCDIC is a

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

24) Bps is short for:

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

26) Frequency is measured in:

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

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

29) Which of the following devices uses parallel transmission?

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

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

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

33) How many characters can Unicode represcnt?

34) Analog signal is measured in:

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

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

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

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

39) Which of the following is the fastest communication mode

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

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

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

43) How many modes of data communication are available?

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

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

46) An important property of fiber optic cable is:

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

48) What is another term for unguided media?

49) Select unguided media from the following:

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

51) Each set of bit pattern is called:

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

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

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

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

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

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

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

59) Transmission from Earth to satellite is called:

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

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

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

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

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

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

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

67) Television and radio broadcasts are examples of:

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

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

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

71) Which of the following technique uses modulation?

72) Modem stands for:

73) The diameter of fiber optical cable is:

74) Data is transmitted block by block in: .

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

76) Internet surfing is an example of:

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

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

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

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

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

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

83) Transmission media are usually categorized as_

84) Sound,light and radio waves are examples of

85) Digital signals are commonly known as:

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

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

88) BCD code is a_

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

90) What is another term for guided media?

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

92) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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

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

99) The communication channels can be divided into_categories:

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