AIOU test 5/01/2023

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

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

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

4) Digital signal represents a sequence of values.

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

6) ASCII code was.developed by:

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

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

9) How many modes of data communication are available?

10) Computer transmit data in the form of codes.

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

12) BCD code is a_

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

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

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

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

17) The music and speech.represent:

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

19) Which of the following technique uses modulation?

20) Unicode uses:

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

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

23) Bps is short for:

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

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

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

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

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

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

30) An important property of fiber optic cable is:

31) Sound,light and radio waves are examples of

32) What is another term for unguided media?

33) Which of the following devices uses parallel transmission?

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

35) Digital signals are commonly known as:

36) Each set of bit pattern is called:

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

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

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

40) Transmission media are usually categorized as_

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

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

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

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

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

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

47) The diameter of fiber optical cable is:

48) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

53) The types.of signals can be:

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

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

56) An example of non-numerical data is:

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

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

59) BCD stands for:

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

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

62) How many characters can Unicode represcnt?

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

64) Television and radio broadcasts are examples of:

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

66) What is another term for guided media?

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

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

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

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

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

72) EBCDIC is a

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

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

75) Data is transmitted block by block in: .

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

77) Analog signal is measured in:

78) Modem stands for:

79) IBM stands for:

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

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

82) Internet surfing is an example of:

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

84) The communication channels can be divided into_categories:

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

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

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

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

89) Transmission from Earth to satellite is called:

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

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

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

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

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

95) Which of the following is the fastest communication mode

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

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

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

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

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