AIOU test 5/01/2023

1) An advantage of synchronous over asynchronous transmission is:

2) Data is transmitted block by block in: .

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

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

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

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

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

8) Transmission from Earth to satellite is called:

9) Analog signal is measured in:

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

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

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

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

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

15) Select unguided media from the following:

16) BCD code is a_

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

18) How many characters can Unicode represcnt?

19) Frequency is measured in:

20) Each set of bit pattern is called:

21) The types.of signals can be:

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

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

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

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

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

27) Sound,light and radio waves are examples of

28) Which of the following is the fastest communication mode

29) BCD stands for:

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

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

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

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

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

35) What is another term for unguided media?

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

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

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

39) Digital signal represents a sequence of values.

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

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

42) ASCII code was.developed by:

43) IBM stands for:

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

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

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

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

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

49) EBCDIC is a

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

51) Modem stands for:

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

53) The communication channels can be divided into_categories:

54) An important property of fiber optic cable is:

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

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

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

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

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

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

61) The diameter of fiber optical cable is:

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

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

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

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

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

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

68) How many modes of data communication are available?

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

70) Transmission media are usually categorized as_

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

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

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

74) Which of the following technique uses modulation?

75) Computer transmit data in the form of codes.

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

77) What is another term for guided media?

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

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

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

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

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

83) Digital signals are commonly known as:

84) The music and speech.represent:

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

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

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

88) Bps is short for:

89) Which of the following devices uses parallel transmission?

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

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

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

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

94) An example of non-numerical data is:

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

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

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

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

99) Unicode uses:

100) Television and radio broadcasts are examples of: