AIOU test 5/01/2023

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

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

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

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

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

6) What is another term for unguided media?

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

8) Analog signal is measured in:

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

10) The types.of signals can be:

11) An example of non-numerical data is:

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

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

14) Transmission media are usually categorized as_

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

16) Modem stands for:

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

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

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

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

21) An important property of fiber optic cable is:

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

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

24) Which of the following technique uses modulation?

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

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

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

28) The communication channels can be divided into_categories:

29) Transmission from Earth to satellite is called:

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

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

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

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

34) Unicode uses:

35) Bps is short for:

36) ASCII code was.developed by:

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

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

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

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

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

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

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

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

45) Internet surfing is an example of:

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

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

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

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

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

51) Digital signal represents a sequence of values.

52) Television and radio broadcasts are examples of:

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

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

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

56) Digital signals are commonly known as:

57) An advantage of synchronous over asynchronous transmission is:

58) IBM stands for:

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

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

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

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

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

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

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

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

67) BCD code is a_

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

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

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

71) EBCDIC is a

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

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

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

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

76) The music and speech.represent:

77) Frequency is measured in:

78) Select unguided media from the following:

79) Data is transmitted block by block in: .

80) Each set of bit pattern is called:

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

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

83) The diameter of fiber optical cable is:

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

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

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

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

88) How many modes of data communication are available?

89) Which of the following is the fastest communication mode

90) Which of the following devices uses parallel transmission?

91) Sound,light and radio waves are examples of

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

93) Computer transmit data in the form of codes.

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

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

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

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

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

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

100) What is another term for guided media?