AIOU test 5/01/2023

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

2) Sound,light and radio waves are examples of

3) Bps is short for:

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

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

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

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

8) What is another term for unguided media?

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

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

11) Internet surfing is an example of:

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

13) Which of the following is the fastest communication mode

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

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

16) ASCII code was.developed by:

17) Frequency is measured in:

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

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

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

21) BCD stands for:

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

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

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

25) Computer transmit data in the form of codes.

26) Unicode uses:

27) An advantage of synchronous over asynchronous transmission is:

28) Each set of bit pattern is called:

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

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

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

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

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

34) EBCDIC is a

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

36) The communication channels can be divided into_categories:

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

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

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

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

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

42) How many modes of data communication are available?

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

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

45) Television and radio broadcasts are examples of:

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

47) Select unguided media from the following:

48) IBM stands for:

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

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

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

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

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

54) BCD code is a_

55) The types.of signals can be:

56) An example of non-numerical data is:

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

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

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

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

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

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

63) What is another term for guided media?

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

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

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

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

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

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

70) Transmission media are usually categorized as_

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

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

73) Digital signals are commonly known as:

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

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

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

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

78) Which of the following technique uses modulation?

79) Transmission from Earth to satellite is called:

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

81) The diameter of fiber optical cable is:

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

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

84) Modem stands for:

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

86) The music and speech.represent:

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

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

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

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

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

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

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

94) Digital signal represents a sequence of values.

95) Which of the following devices uses parallel transmission?

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

97) How many characters can Unicode represcnt?

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

99) An important property of fiber optic cable is:

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