AIOU test 5/01/2023

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

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

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

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

5) An example of non-numerical data is:

6) What is another term for guided media?

7) The music and speech.represent:

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

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

10) Digital signals are commonly known as:

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

12) Modem stands for:

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

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

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

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

17) Bps is short for:

18) BCD code is a_

19) EBCDIC is a

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

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

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

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

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

25) Each set of bit pattern is called:

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

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

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

29) The diameter of fiber optical cable is:

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

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

32) How many characters can Unicode represcnt?

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

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

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

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

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

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

39) ASCII code was.developed by:

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

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

42) Which of the following technique uses modulation?

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

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

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

46) The types.of signals can be:

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

48) Transmission media are usually categorized as_

49) Which of the following is the fastest communication mode

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

51) Which of the following devices uses parallel transmission?

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

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

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

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

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

57) Computer transmit data in the form of codes.

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

59) An important property of fiber optic cable is:

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

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

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

63) The communication channels can be divided into_categories:

64) Data is transmitted block by block in: .

65) Unicode uses:

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

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

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

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

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

71) Transmission from Earth to satellite is called:

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

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

74) An advantage of synchronous over asynchronous transmission is:

75) Internet surfing is an example of:

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

77) Analog signal is measured in:

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

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

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

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

82) IBM stands for:

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

84) How many modes of data communication are available?

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

86) Frequency is measured in:

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

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

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

90) BCD stands for:

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

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

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

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

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

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

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

98) Sound,light and radio waves are examples of

99) What is another term for unguided media?

100) Digital signal represents a sequence of values.