AIOU test 5/01/2023

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

2) BCD code is a_

3) An advantage of synchronous over asynchronous transmission is:

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

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

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

7) Frequency is measured in:

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

9) Which of the following technique uses modulation?

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

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

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

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

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

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

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

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

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

19) Sound,light and radio waves are examples of

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

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

22) Transmission media are usually categorized as_

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

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

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

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

27) Transmission from Earth to satellite is called:

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

29) ASCII code was.developed by:

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

31) Which of the following devices uses parallel transmission?

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

33) EBCDIC is a

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

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

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

37) What is another term for unguided media?

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

39) The diameter of fiber optical cable is:

40) The types.of signals can be:

41) Each set of bit pattern is called:

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

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

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

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

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

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

48) How many modes of data communication are available?

49) Bps is short for:

50) Which of the following is the fastest communication mode

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

52) Internet surfing is an example of:

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

54) Computer transmit data in the form of codes.

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

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

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

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

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

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

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

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

63) The music and speech.represent:

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

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

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

67) Unicode uses:

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

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

70) Digital signals are commonly known as:

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

72) Digital signal represents a sequence of values.

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

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

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

76) Data is transmitted block by block in: .

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

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

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

80) Select unguided media from the following:

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

82) An important property of fiber optic cable is:

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

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

85) How many characters can Unicode represcnt?

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

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

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

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

90) Analog signal is measured in:

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

92) The communication channels can be divided into_categories:

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

94) An example of non-numerical data is:

95) IBM stands for:

96) Television and radio broadcasts are examples of:

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

98) What is another term for guided media?

99) BCD stands for:

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