AIOU test 5/01/2023

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

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

3) Data is transmitted block by block in: .

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

5) Each set of bit pattern is called:

6) An example of non-numerical data is:

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

8) Which of the following devices uses parallel transmission?

9) The diameter of fiber optical cable is:

10) What is another term for unguided media?

11) The communication channels can be divided into_categories:

12) EBCDIC is a

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

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

15) ASCII code was.developed by:

16) Analog signal is measured in:

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

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

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

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

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

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

23) Unicode uses:

24) Which of the following is the fastest communication mode

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

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

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

28) BCD code is a_

29) Transmission from Earth to satellite is called:

30) How many modes of data communication are available?

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

32) Modem stands for:

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

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

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

36) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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

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

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

44) Transmission media are usually categorized as_

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

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

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

48) Digital signal represents a sequence of values.

49) Sound,light and radio waves are examples of

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

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

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

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

54) What is another term for guided media?

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

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

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

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

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

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

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

62) Bps is short for:

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

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

65) Digital signals are commonly known as:

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

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

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

69) Which of the following technique uses modulation?

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

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

72) Frequency is measured in:

73) BCD stands for:

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

75) The types.of signals can be:

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

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

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

79) The music and speech.represent:

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

81) Select unguided media from the following:

82) Television and radio broadcasts are examples of:

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

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

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

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

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

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

89) An important property of fiber optic cable is:

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

91) Computer transmit data in the form of codes.

92) IBM stands for:

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

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

95) Internet surfing is an example of:

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

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

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

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

100) How many characters can Unicode represcnt?