AIOU test 5/01/2023

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

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

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

4) IBM stands for:

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

6) ASCII code was.developed by:

7) An example of non-numerical data is:

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

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

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

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

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

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

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

15) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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

21) Select unguided media from the following:

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

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

24) Television and radio broadcasts are examples of:

25) Sound,light and radio waves are examples of

26) The communication channels can be divided into_categories:

27) Data is transmitted block by block in: .

28) Transmission from Earth to satellite is called:

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

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

31) EBCDIC is a

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

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

34) Digital signals are commonly known as:

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

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

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

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

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

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

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

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

43) Which of the following technique uses modulation?

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

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

46) Modem stands for:

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

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

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

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

51) BCD code is a_

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

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

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

55) Internet surfing is an example of:

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

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

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

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

60) What is another term for guided media?

61) How many characters can Unicode represcnt?

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

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

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

65) Which of the following is the fastest communication mode

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

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

68) How many modes of data communication are available?

69) Frequency is measured in:

70) Transmission media are usually categorized as_

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

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

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

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

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

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

77) The types.of signals can be:

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

79) The diameter of fiber optical cable is:

80) What is another term for unguided media?

81) The music and speech.represent:

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

83) Each set of bit pattern is called:

84) Unicode uses:

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

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

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

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

89) Bps is short for:

90) Computer transmit data in the form of codes.

91) Which of the following devices uses parallel transmission?

92) An important property of fiber optic cable is:

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

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

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

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

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

98) Digital signal represents a sequence of values.

99) Analog signal is measured in:

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