AIOU test 5/01/2023

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

2) ASCII code was.developed by:

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

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

5) IBM stands for:

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

7) BCD stands for:

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

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

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

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

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

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

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

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

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

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

18) Data is transmitted block by block in: .

19) BCD code is a_

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

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

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

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

24) What is another term for unguided media?

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

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

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

28) Each set of bit pattern is called:

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

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

31) Select unguided media from the following:

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

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

34) Modem stands for:

35) The music and speech.represent:

36) Digital signals are commonly known as:

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

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

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

40) An example of non-numerical data is:

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

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

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

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

45) Digital signal represents a sequence of values.

46) How many characters can Unicode represcnt?

47) The diameter of fiber optical cable is:

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

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

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

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

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

53) Which of the following is the fastest communication mode

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

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

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

57) Which of the following technique uses modulation?

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

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

60) Television and radio broadcasts are examples of:

61) EBCDIC is a

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

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

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

65) Transmission from Earth to satellite is called:

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

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

68) Internet surfing is an example of:

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

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

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

72) Computer transmit data in the form of codes.

73) Bps is short for:

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

75) An important property of fiber optic cable is:

76) An advantage of synchronous over asynchronous transmission is:

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

78) Unicode uses:

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

80) The types.of signals can be:

81) Sound,light and radio waves are examples of

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

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

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

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

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

87) Frequency is measured in:

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

89) Transmission media are usually categorized as_

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

91) Which of the following devices uses parallel transmission?

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

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

94) Analog signal is measured in:

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

96) The communication channels can be divided into_categories:

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

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

99) What is another term for guided media?

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