AIOU test 5/01/2023

1) An important property of fiber optic cable is:

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

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

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

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

6) Computer transmit data in the form of codes.

7) BCD stands for:

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

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

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

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

12) The types.of signals can be:

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

14) Digital signal represents a sequence of values.

15) Analog signal is measured in:

16) Frequency is measured in:

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

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

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

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

21) Transmission from Earth to satellite is called:

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

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

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

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

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

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

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

29) How many characters can Unicode represcnt?

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

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

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

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

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

35) Which of the following technique uses modulation?

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

37) The diameter of fiber optical cable is:

38) BCD code is a_

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

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

41) Internet surfing is an example of:

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

43) Modem stands for:

44) IBM stands for:

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

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

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

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

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

50) Each set of bit pattern is called:

51) Select unguided media from the following:

52) An example of non-numerical data is:

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

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

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

56) Digital signals are commonly known as:

57) Data is transmitted block by block in: .

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

59) What is another term for unguided media?

60) The music and speech.represent:

61) The communication channels can be divided into_categories:

62) Which of the following is the fastest communication mode

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

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

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

66) Unicode uses:

67) Which of the following devices uses parallel transmission?

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

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

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

71) How many modes of data communication are available?

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

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

74) Transmission media are usually categorized as_

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

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

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

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

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

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

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

82) Sound,light and radio waves are examples of

83) ASCII code was.developed by:

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

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

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

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

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

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

90) Bps is short for:

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

92) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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

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

99) EBCDIC is a

100) What is another term for guided media?