AIOU test 5/01/2023

1) Transmission from Earth to satellite is called:

2) Analog signal is measured in:

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

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

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

6) The diameter of fiber optical cable is:

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

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

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

10) An advantage of synchronous over asynchronous transmission is:

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

12) Television and radio broadcasts are examples of:

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

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

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

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

17) An important property of fiber optic cable is:

18) The communication channels can be divided into_categories:

19) What is another term for unguided media?

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

21) An example of non-numerical data is:

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

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

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

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

26) How many modes of data communication are available?

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

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

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

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

31) BCD stands for:

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

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

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

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

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

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

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

39) Digital signal represents a sequence of values.

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

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

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

43) Each set of bit pattern is called:

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

45) Bps is short for:

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

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

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

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

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

51) Internet surfing is an example of:

52) Sound,light and radio waves are examples of

53) Computer transmit data in the form of codes.

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

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

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

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

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

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

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

61) Frequency is measured in:

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

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

64) Select unguided media from the following:

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

66) Digital signals are commonly known as:

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

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

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

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

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

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

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

74) EBCDIC is a

75) Which of the following devices uses parallel transmission?

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

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

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

79) Modem stands for:

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

81) Which of the following technique uses modulation?

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

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

84) What is another term for guided media?

85) The types.of signals can be:

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

87) IBM stands for:

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

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

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

91) Unicode uses:

92) Data is transmitted block by block in: .

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

94) Transmission media are usually categorized as_

95) How many characters can Unicode represcnt?

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

97) The music and speech.represent:

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

99) Which of the following is the fastest communication mode

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