AIOU test 5/01/2023

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

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

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

4) BCD stands for:

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

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

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

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

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

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

11) Modem stands for:

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

13) EBCDIC is a

14) BCD code is a_

15) Which of the following technique uses modulation?

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

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

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

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

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

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

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

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

24) IBM stands for:

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

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

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

28) Transmission from Earth to satellite is called:

29) Sound,light and radio waves are examples of

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

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

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

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

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

35) Internet surfing is an example of:

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

37) Frequency is measured in:

38) Select unguided media from the following:

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

40) Television and radio broadcasts are examples of:

41) Computer transmit data in the form of codes.

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

43) How many characters can Unicode represcnt?

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

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

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

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

48) Digital signals are commonly known as:

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

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

51) Transmission media are usually categorized as_

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

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

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

55) The communication channels can be divided into_categories:

56) Analog signal is measured in:

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

58) Each set of bit pattern is called:

59) Bps is short for:

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

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

62) The types.of signals can be:

63) What is another term for unguided media?

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

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

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

67) An important property of fiber optic cable is:

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

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

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

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

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

73) The diameter of fiber optical cable is:

74) Which of the following is the fastest communication mode

75) An advantage of synchronous over asynchronous transmission is:

76) The music and speech.represent:

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

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

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

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

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

82) What is another term for guided media?

83) How many modes of data communication are available?

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

85) ASCII code was.developed by:

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

87) Data is transmitted block by block in: .

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

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

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

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

92) Unicode uses:

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

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

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

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

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

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

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

100) Digital signal represents a sequence of values.