AIOU test 5/01/2023

1) Transmission media are usually categorized as_

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

3) Digital signal represents a sequence of values.

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

5) Bps is short for:

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

7) An advantage of synchronous over asynchronous transmission is:

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

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

10) Digital signals are commonly known as:

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

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

13) An example of non-numerical data is:

14) The communication channels can be divided into_categories:

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

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

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

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

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

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

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

22) Which of the following is the fastest communication mode

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

24) An important property of fiber optic cable is:

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

26) BCD code is a_

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

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

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

30) Unicode uses:

31) Sound,light and radio waves are examples of

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

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

34) Modem stands for:

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

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

37) IBM stands for:

38) ASCII code was.developed by:

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

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

41) Television and radio broadcasts are examples of:

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

43) How many modes of data communication are available?

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

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

46) Transmission from Earth to satellite is called:

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

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

49) Internet surfing is an example of:

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

51) Frequency is measured in:

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

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

54) EBCDIC is a

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

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

57) The diameter of fiber optical cable is:

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

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

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

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

62) What is another term for unguided media?

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

64) BCD stands for:

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

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

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

68) What is another term for guided media?

69) The types.of signals can be:

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

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

72) Which of the following devices uses parallel transmission?

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

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

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

76) Data is transmitted block by block in: .

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

78) Select unguided media from the following:

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

80) Analog signal is measured in:

81) The music and speech.represent:

82) Computer transmit data in the form of codes.

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

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

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

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

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

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

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

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

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

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

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

94) Which of the following technique uses modulation?

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

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

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

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

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

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