AIOU test 5/01/2023

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

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

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

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

5) An important property of fiber optic cable is:

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

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

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

9) Which of the following devices uses parallel transmission?

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

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

12) Frequency is measured in:

13) Digital signals are commonly known as:

14) Analog signal is measured in:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

30) Which of the following is the fastest communication mode

31) IBM stands for:

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

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

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

35) Unicode uses:

36) EBCDIC is a

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

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

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

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

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

42) The communication channels can be divided into_categories:

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

44) The types.of signals can be:

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

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

47) Transmission from Earth to satellite is called:

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

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

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

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

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

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

54) How many characters can Unicode represcnt?

55) How many modes of data communication are available?

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

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

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

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

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

61) Television and radio broadcasts are examples of:

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

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

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

65) An advantage of synchronous over asynchronous transmission is:

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

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

68) Digital signal represents a sequence of values.

69) ASCII code was.developed by:

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

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

72) Each set of bit pattern is called:

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

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

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

76) An example of non-numerical data is:

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

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

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

80) Data is transmitted block by block in: .

81) The music and speech.represent:

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

83) Modem stands for:

84) What is another term for guided media?

85) The diameter of fiber optical cable is:

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

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

88) Bps is short for:

89) Sound,light and radio waves are examples of

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

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

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

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

94) Transmission media are usually categorized as_

95) Which of the following technique uses modulation?

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

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

98) BCD code is a_

99) Computer transmit data in the form of codes.

100) BCD stands for: