AIOU test 5/01/2023

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

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

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

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

5) Transmission media are usually categorized as_

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

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

8) IBM stands for:

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

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

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

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

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

14) What is another term for guided media?

15) How many modes of data communication are available?

16) Frequency is measured in:

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

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

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

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

21) Digital signal represents a sequence of values.

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

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

24) Internet surfing is an example of:

25) ASCII code was.developed by:

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

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

28) Unicode uses:

29) The types.of signals can be:

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

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

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

33) Transmission from Earth to satellite is called:

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

35) The music and speech.represent:

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

37) BCD stands for:

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

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

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

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

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

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

44) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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

50) Data is transmitted block by block in: .

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

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

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

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

55) BCD code is a_

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

57) Each set of bit pattern is called:

58) An important property of fiber optic cable is:

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

60) The diameter of fiber optical cable is:

61) Which of the following devices uses parallel transmission?

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

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

64) Bps is short for:

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

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

67) Computer transmit data in the form of codes.

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

69) Which of the following is the fastest communication mode

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

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

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

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

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

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

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

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

78) Modem stands for:

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

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

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

82) Sound,light and radio waves are examples of

83) What is another term for unguided media?

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

85) The communication channels can be divided into_categories:

86) Analog signal is measured in:

87) Which of the following technique uses modulation?

88) EBCDIC is a

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

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

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

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

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

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

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

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

97) Television and radio broadcasts are examples of:

98) How many characters can Unicode represcnt?

99) Digital signals are commonly known as:

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