AIOU test 5/01/2023

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

2) An advantage of synchronous over asynchronous transmission is:

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

4) Unicode uses:

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

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

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

8) Computer transmit data in the form of codes.

9) IBM stands for:

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

11) Modem stands for:

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

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

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

15) Which of the following technique uses modulation?

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

17) The types.of signals can be:

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

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

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

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

22) BCD stands for:

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

24) ASCII code was.developed by:

25) Bps is short for:

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

27) How many characters can Unicode represcnt?

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

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

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

31) EBCDIC is a

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

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

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

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

36) Analog signal is measured in:

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

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

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

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

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

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

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

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

45) BCD code is a_

46) Transmission from Earth to satellite is called:

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

48) Internet surfing is an example of:

49) An important property of fiber optic cable is:

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

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

52) The communication channels can be divided into_categories:

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

54) Select unguided media from the following:

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

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

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

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

59) Data is transmitted block by block in: .

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

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

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

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

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

65) The music and speech.represent:

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

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

68) Frequency is measured in:

69) Transmission media are usually categorized as_

70) Digital signal represents a sequence of values.

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

72) What is another term for unguided media?

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

74) Digital signals are commonly known as:

75) Sound,light and radio waves are examples of

76) Which of the following is the fastest communication mode

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

78) Each set of bit pattern is called:

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

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

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

82) What is another term for guided media?

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

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

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

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

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

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

89) Television and radio broadcasts are examples of:

90) How many modes of data communication are available?

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

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

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

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

95) Which of the following devices uses parallel transmission?

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

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

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

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

100) An example of non-numerical data is: