AIOU test 5/01/2023

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

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

3) Which of the following is the fastest communication mode

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

5) Digital signal represents a sequence of values.

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

7) An advantage of synchronous over asynchronous transmission is:

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

9) Modem stands for:

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

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

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

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

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

15) Digital signals are commonly known as:

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

17) What is another term for unguided media?

18) Analog signal is measured in:

19) Which of the following technique uses modulation?

20) ASCII code was.developed by:

21) Television and radio broadcasts are examples of:

22) Transmission media are usually categorized as_

23) Data is transmitted block by block in: .

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

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

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

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

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

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

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

31) How many modes of data communication are available?

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

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

34) EBCDIC is a

35) Sound,light and radio waves are examples of

36) Computer transmit data in the form of codes.

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

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

39) The diameter of fiber optical cable is:

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

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

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

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

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

45) The music and speech.represent:

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

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

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

49) Transmission from Earth to satellite is called:

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

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

52) The communication channels can be divided into_categories:

53) The types.of signals can be:

54) Which of the following devices uses parallel transmission?

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

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

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

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

59) How many characters can Unicode represcnt?

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

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

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

63) BCD code is a_

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

65) Bps is short for:

66) IBM stands for:

67) Unicode uses:

68) An important property of fiber optic cable is:

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

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

71) An example of non-numerical data is:

72) Each set of bit pattern is called:

73) What is another term for guided media?

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

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

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

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

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

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

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

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

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

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

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

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

86) BCD stands for:

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

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

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

90) Internet surfing is an example of:

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

92) Select unguided media from the following:

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

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

95) Frequency is measured in:

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

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

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

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

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