AIOU test 5/01/2023

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

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

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

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

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

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

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

8) What is another term for unguided media?

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

10) An example of non-numerical data is:

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

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

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

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

15) What is another term for guided media?

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

17) How many characters can Unicode represcnt?

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

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

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

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

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

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

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

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

26) An important property of fiber optic cable is:

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

28) BCD stands for:

29) The communication channels can be divided into_categories:

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

31) Select unguided media from the following:

32) Television and radio broadcasts are examples of:

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

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

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

36) Modem stands for:

37) Sound,light and radio waves are examples of

38) Which of the following is the fastest communication mode

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

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

41) Which of the following technique uses modulation?

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

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

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

45) The music and speech.represent:

46) Transmission from Earth to satellite is called:

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

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

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

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

51) BCD code is a_

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

53) Analog signal is measured in:

54) Digital signal represents a sequence of values.

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

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

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

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

59) The types.of signals can be:

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

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

62) Which of the following devices uses parallel transmission?

63) Transmission media are usually categorized as_

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

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

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

67) How many modes of data communication are available?

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

69) Data is transmitted block by block in: .

70) ASCII code was.developed by:

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

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

73) Frequency is measured in:

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

75) Each set of bit pattern is called:

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

77) IBM stands for:

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

79) Unicode uses:

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

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

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

83) Internet surfing is an example of:

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

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

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

87) Bps is short for:

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

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

90) EBCDIC is a

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

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

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

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

95) Computer transmit data in the form of codes.

96) An advantage of synchronous over asynchronous transmission is:

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

98) The diameter of fiber optical cable is:

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

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