AIOU test 5/01/2023

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

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

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

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

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

6) Television and radio broadcasts are examples of:

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

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

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

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

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

12) Bps is short for:

13) BCD code is a_

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

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

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

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

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

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

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

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

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

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

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

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

26) Which of the following is the fastest communication mode

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

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

29) The types.of signals can be:

30) What is another term for guided media?

31) The music and speech.represent:

32) IBM stands for:

33) How many characters can Unicode represcnt?

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

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

36) The communication channels can be divided into_categories:

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

38) Computer transmit data in the form of codes.

39) EBCDIC is a

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

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

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

43) Digital signal represents a sequence of values.

44) Each set of bit pattern is called:

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

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

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

48) BCD stands for:

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

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

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

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

53) ASCII code was.developed by:

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

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

56) Analog signal is measured in:

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

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

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

60) Which of the following technique uses modulation?

61) Internet surfing is an example of:

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

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

64) Transmission media are usually categorized as_

65) How many modes of data communication are available?

66) Transmission from Earth to satellite is called:

67) An example of non-numerical data is:

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

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

70) Digital signals are commonly known as:

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

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

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

74) An important property of fiber optic cable is:

75) Data is transmitted block by block in: .

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

77) Frequency is measured in:

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

79) The diameter of fiber optical cable is:

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

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

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

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

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

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

86) Unicode uses:

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

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

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

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

91) What is another term for unguided media?

92) Select unguided media from the following:

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

94) Modem stands for:

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

96) An advantage of synchronous over asynchronous transmission is:

97) Sound,light and radio waves are examples of

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

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

100) Which of the following devices uses parallel transmission?