AIOU test 5/01/2023

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

2) Which of the following devices uses parallel transmission?

3) The types.of signals can be:

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

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

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

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

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

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

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

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

12) Analog signal is measured in:

13) Transmission media are usually categorized as_

14) How many characters can Unicode represcnt?

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

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

17) Modem stands for:

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

19) An example of non-numerical data is:

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

21) An advantage of synchronous over asynchronous transmission is:

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

23) Select unguided media from the following:

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

25) EBCDIC is a

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

27) Sound,light and radio waves are examples of

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

29) BCD stands for:

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

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

32) Data is transmitted block by block in: .

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

34) Each set of bit pattern is called:

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

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

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

38) ASCII code was.developed by:

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

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

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

42) How many modes of data communication are available?

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

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

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

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

47) Television and radio broadcasts are examples of:

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

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

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

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

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

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

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

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

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

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

58) The music and speech.represent:

59) Which of the following technique uses modulation?

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

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

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

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

64) The diameter of fiber optical cable is:

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

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

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

68) What is another term for unguided media?

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

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

71) Digital signals are commonly known as:

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

73) What is another term for guided media?

74) The communication channels can be divided into_categories:

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

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

77) BCD code is a_

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

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

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

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

82) IBM stands for:

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

84) Computer transmit data in the form of codes.

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

86) An important property of fiber optic cable is:

87) Transmission from Earth to satellite is called:

88) Digital signal represents a sequence of values.

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

90) Internet surfing is an example of:

91) Unicode uses:

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

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

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

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

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

97) Which of the following is the fastest communication mode

98) Frequency is measured in:

99) Bps is short for:

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