AIOU test 5/01/2023

1) Which of the following is the fastest communication mode

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

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

4) Frequency is measured in:

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

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

7) Unicode uses:

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

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

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

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

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

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

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

15) What is another term for guided media?

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

17) What is another term for unguided media?

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

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

20) Television and radio broadcasts are examples of:

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

22) How many modes of data communication are available?

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

24) The music and speech.represent:

25) Internet surfing is an example of:

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

27) An advantage of synchronous over asynchronous transmission is:

28) The communication channels can be divided into_categories:

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

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

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

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

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

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

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

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

37) Digital signal represents a sequence of values.

38) The types.of signals can be:

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

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

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

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

43) IBM stands for:

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

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

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

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

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

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

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

51) Modem stands for:

52) Analog signal is measured in:

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

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

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

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

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

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

59) Transmission media are usually categorized as_

60) How many characters can Unicode represcnt?

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

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

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

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

65) EBCDIC is a

66) An example of non-numerical data is:

67) Computer transmit data in the form of codes.

68) An important property of fiber optic cable is:

69) Transmission from Earth to satellite is called:

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

71) Which of the following devices uses parallel transmission?

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

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

74) Each set of bit pattern is called:

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

76) Bps is short for:

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

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

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

80) BCD stands for:

81) Which of the following technique uses modulation?

82) The diameter of fiber optical cable is:

83) Digital signals are commonly known as:

84) ASCII code was.developed by:

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

86) Select unguided media from the following:

87) Sound,light and radio waves are examples of

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

89) Data is transmitted block by block in: .

90) BCD code is a_

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

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

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

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

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

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

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

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

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

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