AIOU test 5/01/2023

1) Computer transmit data in the form of codes.

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

3) Digital signals are commonly known as:

4) Data is transmitted block by block in: .

5) The diameter of fiber optical cable is:

6) What is another term for unguided media?

7) Modem stands for:

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

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

10) Unicode uses:

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

12) How many characters can Unicode represcnt?

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

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

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

16) The music and speech.represent:

17) Transmission from Earth to satellite is called:

18) EBCDIC is a

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

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

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

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

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

24) Television and radio broadcasts are examples of:

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

26) Transmission media are usually categorized as_

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

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

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

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

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

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

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

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

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

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

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

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

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

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

41) ASCII code was.developed by:

42) Analog signal is measured in:

43) Which of the following devices uses parallel transmission?

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

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

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

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

48) BCD stands for:

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

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

51) What is another term for guided media?

52) IBM stands for:

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

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

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

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

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

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

59) Which of the following technique uses modulation?

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

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

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

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

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

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

66) Which of the following is the fastest communication mode

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

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

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

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

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

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

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

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

75) An example of non-numerical data is:

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

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

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

79) Frequency is measured in:

80) How many modes of data communication are available?

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

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

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

84) The types.of signals can be:

85) Internet surfing is an example of:

86) BCD code is a_

87) Bps is short for:

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

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

90) An important property of fiber optic cable is:

91) Each set of bit pattern is called:

92) Select unguided media from the following:

93) Digital signal represents a sequence of values.

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

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

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

97) Sound,light and radio waves are examples of

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

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

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