AIOU test 5/01/2023

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

2) ASCII code was.developed by:

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

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

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

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

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

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

9) Which of the following technique uses modulation?

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

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

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

13) Each set of bit pattern is called:

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

15) BCD code is a_

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

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

18) The music and speech.represent:

19) Data is transmitted block by block in: .

20) Digital signal represents a sequence of values.

21) Digital signals are commonly known as:

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

23) Sound,light and radio waves are examples of

24) Analog signal is measured in:

25) What is another term for guided media?

26) Transmission media are usually categorized as_

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

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

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

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

31) Internet surfing is an example of:

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

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

34) An advantage of synchronous over asynchronous transmission is:

35) Frequency is measured in:

36) IBM stands for:

37) Modem stands for:

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

39) The communication channels can be divided into_categories:

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

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

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

43) How many characters can Unicode represcnt?

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

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

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

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

48) How many modes of data communication are available?

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

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

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

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

53) Television and radio broadcasts are examples of:

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

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

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

57) Select unguided media from the following:

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

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

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

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

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

63) The diameter of fiber optical cable is:

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

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

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

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

68) The types.of signals can be:

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

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

71) An important property of fiber optic cable is:

72) Bps is short for:

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

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

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

76) Computer transmit data in the form of codes.

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

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

79) BCD stands for:

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

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

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

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

84) Which of the following devices uses parallel transmission?

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

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

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

88) EBCDIC is a

89) Unicode uses:

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

91) An example of non-numerical data is:

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

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

94) What is another term for unguided media?

95) Which of the following is the fastest communication mode

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

97) Transmission from Earth to satellite is called:

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

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

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