AIOU test 5/01/2023

1) Computer transmit data in the form of codes.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

16) Data is transmitted block by block in: .

17) EBCDIC is a

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

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

20) The communication channels can be divided into_categories:

21) Each set of bit pattern is called:

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

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

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

25) BCD code is a_

26) What is another term for unguided media?

27) IBM stands for:

28) Which of the following is the fastest communication mode

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

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

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

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

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

34) Analog signal is measured in:

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

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

37) An important property of fiber optic cable is:

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

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

40) What is another term for guided media?

41) How many modes of data communication are available?

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

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

44) Transmission from Earth to satellite is called:

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

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

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

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

49) Sound,light and radio waves are examples of

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

51) Television and radio broadcasts are examples of:

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

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

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

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

56) An advantage of synchronous over asynchronous transmission is:

57) Digital signal represents a sequence of values.

58) Unicode uses:

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

60) Which of the following technique uses modulation?

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

62) The types.of signals can be:

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

64) The music and speech.represent:

65) Bps is short for:

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

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

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

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

70) An example of non-numerical data is:

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

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

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

74) Transmission media are usually categorized as_

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

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

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

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

79) BCD stands for:

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

81) Select unguided media from the following:

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

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

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

85) Frequency is measured in:

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

87) How many characters can Unicode represcnt?

88) Internet surfing is an example of:

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

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

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

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

93) Digital signals are commonly known as:

94) Modem stands for:

95) ASCII code was.developed by:

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

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

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

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

100) The diameter of fiber optical cable is: