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

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

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

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

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

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

7) What is another term for guided media?

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

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

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

11) How many modes of data communication are available?

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

13) EBCDIC is a

14) The music and speech.represent:

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

16) How many characters can Unicode represcnt?

17) Digital signals are commonly known as:

18) An advantage of synchronous over asynchronous transmission is:

19) What is another term for unguided media?

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

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

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

23) Which of the following devices uses parallel transmission?

24) BCD code is a_

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

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

27) Which of the following technique uses modulation?

28) IBM stands for:

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

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

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

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

33) Bps is short for:

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

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

36) The types.of signals can be:

37) Digital signal represents a sequence of values.

38) Television and radio broadcasts are examples of:

39) Analog signal is measured in:

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

41) Internet surfing is an example of:

42) Sound,light and radio waves are examples of

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

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

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

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

47) Select unguided media from the following:

48) An example of non-numerical data is:

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

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

51) BCD stands for:

52) Which of the following is the fastest communication mode

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

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

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

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

57) Transmission from Earth to satellite is called:

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

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

60) Transmission media are usually categorized as_

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

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

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

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

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

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

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

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

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

70) The communication channels can be divided into_categories:

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

72) Frequency is measured in:

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

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

75) Modem stands for:

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

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

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

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

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

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

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

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

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

85) ASCII code was.developed by:

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

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

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

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

90) Unicode uses:

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

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

93) The diameter of fiber optical cable is:

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

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

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

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

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

99) Each set of bit pattern is called:

100) Data is transmitted block by block in: .