AIOU test 5/01/2023

1) IBM stands for:

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

3) Digital signals are commonly known as:

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

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

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

7) The diameter of fiber optical cable is:

8) What is another term for guided media?

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

10) Bps is short for:

11) Computer transmit data in the form of codes.

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

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

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

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

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

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

18) How many modes of data communication are available?

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

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

21) BCD stands for:

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

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

24) Each set of bit pattern is called:

25) Frequency is measured in:

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

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

28) EBCDIC is a

29) An advantage of synchronous over asynchronous transmission is:

30) The types.of signals can be:

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

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

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

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

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

36) Which of the following is the fastest communication mode

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

38) Internet surfing is an example of:

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

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

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

42) ASCII code was.developed by:

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

44) Transmission from Earth to satellite is called:

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

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

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

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

49) BCD code is a_

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

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

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

53) Sound,light and radio waves are examples of

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

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

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

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

58) Unicode uses:

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

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

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

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

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

64) Data is transmitted block by block in: .

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

66) Transmission media are usually categorized as_

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

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

69) How many characters can Unicode represcnt?

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

71) Analog signal is measured in:

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

73) Modem stands for:

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

75) An important property of fiber optic cable is:

76) What is another term for unguided media?

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

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

79) Which of the following technique uses modulation?

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

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

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

83) Which of the following devices uses parallel transmission?

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

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

86) The music and speech.represent:

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

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

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

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

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

92) Television and radio broadcasts are examples of:

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

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

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

96) Select unguided media from the following:

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

98) An example of non-numerical data is:

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

100) The communication channels can be divided into_categories: