AIOU test 5/01/2023

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

2) The music and speech.represent:

3) Modem stands for:

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

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

6) What is another term for unguided media?

7) What is another term for guided media?

8) Internet surfing is an example of:

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

10) BCD code is a_

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

12) EBCDIC is a

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

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

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

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

17) Bps is short for:

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

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

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

21) BCD stands for:

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

23) How many modes of data communication are available?

24) The diameter of fiber optical cable is:

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

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

27) Analog signal is measured in:

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

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

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

31) Select unguided media from the following:

32) Each set of bit pattern is called:

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

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

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

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

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

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

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

40) Unicode uses:

41) Television and radio broadcasts are examples of:

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

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

44) Transmission media are usually categorized as_

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

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

47) Sound,light and radio waves are examples of

48) Digital signals are commonly known as:

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

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

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

52) Computer transmit data in the form of codes.

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

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

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

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

57) The communication channels can be divided into_categories:

58) Transmission from Earth to satellite is called:

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

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

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

62) Which of the following technique uses modulation?

63) Which of the following is the fastest communication mode

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

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

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

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

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

69) An example of non-numerical data is:

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

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

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

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

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

75) ASCII code was.developed by:

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

77) How many characters can Unicode represcnt?

78) An important property of fiber optic cable is:

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

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

81) Frequency is measured in:

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

83) IBM stands for:

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

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

86) An advantage of synchronous over asynchronous transmission is:

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

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

89) Digital signal represents a sequence of values.

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

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

92) Data is transmitted block by block in: .

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

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

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

96) The types.of signals can be:

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

98) Which of the following devices uses parallel transmission?

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

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