# 11th Computer Science MCQ’s with Answers Chapter no 3 | 1st Year Computer Science Mcqs

We are providing accurate mcq questions for class 11 computer science chapter wise. You can read 1st year computer science mcqs with answers.

Chapter 3

Data Communication.

Encircle the most appropriate answer among the following options

1          Microwave transmission, coaxial cables and fiber optic are examples of choose which one is correct?

1. Modems
3. Gateways
4. Ring Network

2          Data communication requires only a choose which one is correct?

1. Sender
3. Transmission Medium
4. All of the above

3          The process of transferring data from one location to another is called choose which one is correct?

1. Data processing
2. Data computing
3. Data communication
4. Data sequencing

4          The information that is to be transferred from one location to another is called choose which one is correct?

1.  Signals
2. Data
3. Sender
4. Message

5.               is component of data communication choose which one is correct?

1. Sender
3. Encoder and Decoder
4. All

6          — is not component of data communication choose which one is correct?

1. Medium
2. Voltage
3. Decoder

7          A device that receives messages is called choose which one is correct?

1. Transmitter
3. Source
4. Sender

8          The is the physical path over which a message travels choose which one is correct?

1. Protocol
2. Medium
3. Single
4. Alle

9          The electromagnetic or light waves representing data are called choose which one is correct?

1. Refraction
2. Information
3. Signals
4. None

10.       BIT stands for

1. Binary Integer
2. Binary Digit
3. Binary Interval
4. None of the above

11        Communication between a computer and a keyboard involves transmission choose which one is correct?

1. Simplex
2. half-duplex
3. Full-duplex
4. automatic

12        Light, sound, and radio waves are examples of choose which one is correct?

1. Analog signals
2. Digital signals
3. Simple signals
4. None

13        The number of times a wave repeats during a specific time interval is called choose which one is correct?

1. Amplitude
2. Oscillation
3. Frequency
4. Pulses

14        The height of wave within a given period of time is called choose which one is correct?

1. Amplitude
2. Oscillation
3. Frequency
4. Pulses

15        Which type of data consists of words, sentences, and paragraphs?

1. Text
2. Image
3. Numeric
4. Video

16        The charts, graphs and pictures are examples of choose which one is correct?

1. Image
2. Audio
3. Video
4. Text

17        The music and speech represent the choose which one is correct?

1. Image data
2. Audio data
3. Video data
4. Text data

18        data type represents actions and movements choose which one is correct?

1. Image data
2. Audio data
3. Video data
4. Text data

19              coding schemes uses 4 bit code choose which one is correct?

1. Unicode
2. ASCII
3. EBCDIC
4. BCD

20             coding schemes is used by IBM choose which one is correct?

1. Unicode
2. ASCII
3. EBCDIC
4.  BCD

21        IBM stands for choose which one is correct?

2. International Binary Machine

22        The  is the physical path over which the message travels choose which one is correct?

1. Protocol
2. Medium
3. Single
4. All the above

23        The height of the wave is called choose which one is correct?

1. Oscillation
2. Amplitude
3. Signal
4. frequency

24        ASCII 7-bit code can represent maximum choose which one is correct?

1. 256 characters
2. 128 characters
3. 64 characters
4. 65536 characters

25. ASCII 8-bit code can represent maximum choose which one is correct?

1. 256 characters
2. 128 characters
3. 64 characters
4. 65536 characters

26               code systems can represent up to 65536 symbols choose which one is correct?

1. ASCII-7
2. EBCDIC
3. ASCII-8
4. Unicode

27             coding schemes uses 16-bit code to represent a symbol?

1. BCD
2. EBCDIC
3. ASCII
4. Unicode

28        BCD stands for choose which one is correct?

1. Bit Coded Digit
2. Byte Coded Decimal
3. Binary Coded Decimal
4. None

29        How many types of data transmission modes?

1. 2
2. 3
3. 4
4. 5

30.       In — – communication modes the data communication can take place in only one direction?

1. Simplex
2. Half-duplex
3. Full-duplex
4. None

31        Internet surfing or browsing is an example of choose which one is correct?

1. Simplex
2. Half-duplex
3. Full-duplex
4. None

32.       The conversation of two persons through telephone line is an example of choose which one is correct?

1. Simplex
2. Half-duplex
3. Full-duplex
4. None

33        Which of the following has a 4-bit coding scheme?

1. BCD
2. EBCDIC
3. ASCII
4. Unicode

34        ASCII is ___bit coding scheme.

1. 18
2. 16
3.  7
4. 4.

35              is the fastest communication mode choose which one is correct?

1. Simplex
2. Half-duplex
3. Full-duplex
4. None

36        In— communication modes the multiplexer devices are used choose which one is correct?

1. Simplex
2. Half-duplex
3. Full-duplex
4. None

37               device uses the parallel transmission choose which one is correct?

1. Mouse
2. Keyboard
3. Printer
4. Light pen

38        Inside the computer binary data flows from one unit to another using choose which one is correct?

1. Serial mode
2. Parallel mode
3. Both a and b
4. None

39        The flow of traffic on one-lane residential street is an example of choose which one is correct?

1. Serial transmission
2. Parallel transmission
3. Both a and b
4. None

40        An asynchronous line that is idle is identified with a value choose which one is correct?

1. 0
2. 1
3. 23300
4. 100

41        Data is transmitted block-by-block in choose which one is correct?

1. Digital transmission
2. Analog transmission
3. Synchronous transmission
4. Asynchronous transmission

42        Which technique uses modulation?

1. Baseband
3. Bandwidth
4. None

43        Which technique does not use modulation?

1. Baseband
3. Bandwidth
4. None

44        ASCII-7 can represent maximum characters

1. 65536
2. 256
3. 16
4. 128

45        Which of the following has a 16-bit coding scheme?

1. BCD
2. EBCDIC
3. ASCII
4. Unicode

46        Which technique is used to transmit large amount of data such as voice and video, over long distance by using modulation?

1. Baseband
3. Bandwidth
4. None

47        How many types, the communication channels are divided?

1. 2
2. 3
3. 4
4. 5

48        Microwave transmission, coaxial cables and fiber optics are examples of choose which one is correct?

1. Modems
2. Communication media
3. Gateways
4. Ring network

49               is not a communication media choose which one is correct?

1. Twisted wire
2. UTP, STP
3. Microwave
4. Modem

50               is guided media choose which one is correct?

1. Microwave
2. Satellite
3. Fiber optic cable
4. Mobile communication

51        The bandwidth of the coaxial is choose which one is correct?

1. 2 times greater than twisted pair
2. 20 times greater than twisted pair
3. 40 times greater than twisted pair
4. 80 times faster than twisted pair

52        —  is commonly used in LAN choose which one is correct?

1. Satellite
2. Coaxial cable
3. Microwave
4. Fiber optical cable

53                uses light to transmit data choose which one is correct?

1. Twisted pair
2. Coaxial cable
3. Microwave
4. Fiber optical cable

54              is an example of unbounded media choose which one is correct?

1. Microwave
2. Fiber optic cable
3. Twisted pair
4. Coaxial cable

55        An idle line has value 1 then it is called choose which one is correct?

1. Clock
2. Mark state
3. Binary digit
4. Space State

56      In Asynchronous transmission; mark state is represented by choose which one is correct?

1. 2
2. 1
3. 0
4. 50

57        Which one is not unguided media?

1. Satellite
2. Microwave
3. Mobile communication
4. Fiber optical cable

58               communication medium requires “line-of-sight” choose which one is correct?

1. Microwave
2. Fiber optic cable
3. Twisted pair
4. Coaxial cable

59        In microwave transmission system, antennas are placed on a high towers or buildings and these are placed within choose which one is correct?

1. 200 to 300 miles of each other
2. 2 to 3 miles of each other
3. 20 to 30 miles of each other
4. 100 to 200 miles of each other

60        Satellites are approximately         miles above the earth choose which one is correct?

1. 300 miles
2. 22,000 miles
3. 23300 miles
4. 22300 miles

61        Satellite transmission stations that can both send and receive messages are known as choose which one is correct?

3. Earth stations
4. Transmitters

62        — affects the quality of satellite transmission choose which one is correct?

1. Mountains
2. Moon
3. Light rays

63        The process to convert analog signals into digital signals is called choose which one is correct?

1. Modulation
2. Demodulation
3. Digitization
4. Conversion

64        Which term uses modulation to transmit a large volume of data?

1. Baseband
3. Bandwidth
4. None of these

65        The process of converting digital data into analog is called choose which one is correct?

1. Digitization
2. Modulation
3. Processing
4. demodulation

66.       The data signals transmitted over telephone lines are in the form of choose which one is correct?

1. Digital
2. Analog
3. Digital pulses
4. None

67        “bps” stands for choose which one is correct?

1. Bytes per second
2. Baud per second
3. Bits per second
4. None

68        External modem is connected to the choose which one is correct?

1. Serial port
2. Parallel port
3. Both a and b
4. None

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

1. External modem
2. Wireless modem
3. Internal modem

70        Which type of modem does not require any cable as transmission channel to transmit signals?

1. External modem
2. Wireless modem
3. Internal modem
4. All

71. Modem stands for choose which one is correct?

1. Modification/Demodification
2. Modulator/Demodulator
3. Mode/Modeless
4. None