AIOU test 5/01/2023

1) Digital signal represents a sequence of values.

2) Which of the following devices uses parallel transmission?

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

4) Computer transmit data in the form of codes.

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

6) Which of the following is the fastest communication mode

7) How many modes of data communication are available?

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

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

10) EBCDIC is a

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

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

13) Frequency is measured in:

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

15) Television and radio broadcasts are examples of:

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

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

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

19) What is another term for guided media?

20) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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

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

27) The types.of signals can be:

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

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

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

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

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

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

34) An important property of fiber optic cable is:

35) Sound,light and radio waves are examples of

36) Transmission media are usually categorized as_

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

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

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

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

41) BCD stands for:

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

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

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

45) What is another term for unguided media?

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

47) Analog signal is measured in:

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

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

50) Each set of bit pattern is called:

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

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

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

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

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

56) Select unguided media from the following:

57) Bps is short for:

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

59) BCD code is a_

60) The diameter of fiber optical cable is:

61) An example of non-numerical data is:

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

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

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

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

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

67) Transmission from Earth to satellite is called:

68) Which of the following technique uses modulation?

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

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

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

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

73) The music and speech.represent:

74) Unicode uses:

75) ASCII code was.developed by:

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

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

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

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

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

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

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

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

84) How many characters can Unicode represcnt?

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

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

87) The communication channels can be divided into_categories:

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

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

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

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

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

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

94) Digital signals are commonly known as:

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

96) Data is transmitted block by block in: .

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

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

99) Internet surfing is an example of:

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