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| Computer Science 1st Year Chapter 3 Data Communications Questions Bank |
Computer Science 11th Chapter 3 Data Communications Questions Bank
MCQs
Please select the right answer.
1. ____ affects the quality of satellite transmission
2. ____ is not component of data communication
3. — is commonly used in LAN
4. ____ uses light to transmit data
5. _____code systems can represent up to 65536 symbols
6. _____device uses the parallel transmission
7. ____is not a communication media
8. ____ is guided media
9. ____coding schemes uses 4 bit code
10. ___is component of data communication
11. ____ communication medium requires “line-of-sight”
12. ____ is an example of unbounded media
13. ____ is the fastest communication mode
14. _____coding schemes is used by IBM
15. _____coding schemes uses 16-bit code to represent a symbol?
16. ____data type represents actions and movements
17. “bps” stands for
18. Which of the following coding schemes used by IBM?
19. How many characters ASCII 8-bit code can represent?
20. Which of the following type of data is used to display actions and movement?
21. Which of the following coding schemes uses 4-bit code?
22. A device that receives messages is called
23. A telephone conversation is an example ?
24. All of the following are elements of data communication system except:
25. An arrangement in which data can be received and sent simultaneously is called ?
26. An asynchronous line that is idle is identified with a value
27. An idle line has value 1 then it is called
28. An important property of fiber optic cable is
29. Analog signal is measured ?
30. ASCII 7-bit code can represent maximum
31. ASCII 8-bit code can represent maximum
32. ASCII is ___bit coding scheme.
33. ASCII stands for:
34. BCD stands for
35. BIT stands for
36. Communication between a computer and a keyboard involves transmission
37. Communication mode is ?
38. Data communication only requires:
39. Data communication requires only a
40. Data is transmitted block by ?
41. Data is transmitted block-by-block in
42. EBCDIC is a
43. EBCDIC stands for:
44. External modem is connected to the
45. Full duplex communication is made possible by devices called ?
46. Full-duplex communication is made possible by the devices known as:
47. How many character in ASCII7-bit code can represent ?
48. How many character in ASCII8-bit code can represent ?
49. How many character in Unicode ?
50. How many characters ASCII 7-bit code can represent?
51. How many characters can Unicode represent?
52. How many types of data transmission modes?
53. How many types, the communication channels are divided?
54. IBM stands for
55. In ____ ____ communication modes the data communication can take place in only one direction?
56. In Asynchronous transmission; mark state is represented by
57. In____ communication modes the multiplexer devices are used
58. In microwave transmission system, antennas are placed on a high towers or buildings and these are placed within
59. Inside the computer binary data flows from one unit to another using
60. Internet suffering is an example ?
61. Internet surfing is an example of:
62. Internet surfing or browsing is an example of
63. Light, sound, and radio waves are examples of
64. Microwave transmission, coaxial cables and fiber optics are examples of
65. Modem stands for
66. Modulation is performed:
67. Most data transmitted over telephone lines uses ?
68. Physical path that connects the source and receiver is known ?
69. Satellite transmission stations that can both send and receive messages are called:
70. Satellites are approximately miles above the earth
71. Sound light and radio waves are example ?
72. Start/stop bits are not required in this type of transmission ?
73. Television and radio broadcasts are examples of:
74. The bandwidth of the coaxial is
75. The chart graph picture and freehand drawing are example of ?
76. The charts, graphs and pictures are examples of
77. The communication channels can be divided into ?
78. The conversation of two persons through telephone line is an example of
79. The conversation over a walkie-talkie radio is an example of:
80. The data signals transmitted over telephone lines are in the form of
81. The diameter of fiber optical cable is:
82. The electromagnetic or light waves representing data are called
83. The electromagnetic waves representing data are called ?
84. The flow of traffic on one-lane residential street is an example of
85. The height of the wave is called
86. The height of wave within a given period of time is called
87. The height of wave within a given period of time is known as ?
88. The information that is to be transferred from one location to another is called
89. The internal transfer of binary data in a computer uses:
90. The internal transfer of data in computer uses ?
91. The is the physical path over which a message travels
92. The music and speech represent the
93. The music and speech represent:
94. The music speech represent ?
95. The number of time a wave repeats during a specific time interval is called ?
96. The number of times a wave repeats during a specific time interval is called
97. The process of converting a digital signal to an analog signal is called:
98. The process of converting analog to digital signal is known as:
99. The process of converting digital data into analog is called
100. The process of transferring data electronically from one place to another is called
101. The process of transferring data from one location to another is called
102. The process to convert analog signals into digital signals is called
103. The signals produced by a computer to send over phone line must be converted to
104. The is the physical path over which the message travels
105. This type of transmission is sometimes called start transmission ?
106. Transmission from a satellite to its earth-based station is called:
107. Transmission from Earth to satellite is called:
108. Transmission permitting data to move only one way at a time is called ?
109. Unicode is a:
110. What is required to send data instructions or information ?
111. Which communication technique can transmit the data over long distance
112. which data transmission type use clock to control the timing of bits being sent ?
113. Which is the most secure type of transmission medium?
114. Which kind of signal is mostly required by telephone lines?
115. Which multiplexing technique shifts each signal to a different carrier frequency?
116. which of the following coding scheme used by IBM ?
117. Which of the following coding scheme uses 4-bit code ?
118. Which of the following converts digital signals to analog and analog to digital?
119. Which of the following devices uses parallel transmission ?
120. Which of the following has a 16-bit coding scheme?
121. Which of the following has a 4-bit coding scheme?
122. which of the following is fastest communication mode ?
123. Which of the following is NOT a coding scheme to represent data in computer?
124. Which of the following is the fastest communication mode?
125. Which of the following is the insulation on a fiber-optic cable?
126. Which of the following is used to measure modem's data transfer rate?
127. Which of the following technique uses modulation?
128. Which of the following transmission media is used in LAN ?
129. Which of the following type of data used to display actions and movement ?
130. Which one is not unguided media?
131. Which technique does not use modulation?
132. Which technique is used to transmit large amount of data such as voice and video, over long distance by using modulation?
133. Which technique uses modulation?
134. Which term uses modulation to transmit a large volume of data?
135. Which transmission allows data to travel in both directions but only one direction at time ?
136. Which transmission allows data to travel in both directions but only one directorate a time?
137. Which type of data consists of words, sentences and paragraphs?
138. Which type of modem can be added to the system unit through expansion slot?
139. Which type of modem does not require any cable as transmission channel to transmit signals?
Short Questions
1. Compare simplex and half duplex mode?
2. Define analog signal?
3. Define communication system, draw diagram and explain its components.
4. Define Data Communication.
5. Define data encoding and explain FOUR data encoding schemes.
6. Define Data Representation and Explain Encoding Scheme ASCII Code.
7. Define Data Representation and Explain Encoding Scheme BCD Code.
8. Define Data Representation and Explain Encoding Scheme EBCDIC Code.
9. Define Data Representation and Explain Encoding Scheme Unicode Code.
10. Define Guided Media and Twisted Pair Wire.
11. Define MODEM, Transmission Rate, Speed, explain types of MODEM.
12. Define the term “Modulation”.
13. Define the term encoder and decoder?
14. Describe asynchronous data transmission?
15. Describe Bandwidth, Baseband and Broadband.
16. Describe Coaxial Cable.
17. Describe Components of Communication with Diagram.
18. Describe Fiber-Optic Cable.
19. Describe Microwave as a communication medium.
20. Describe Modem, Transmission Rate & Speed.
21. Describe Satellite as a communication medium.
22. Describe Types of Data.
23. Differentiate between Encoder and Decoder.
24. Differentiate between External & Internal Modem.
25. Explain Asynchronous Data Transmission.
26. Explain communication media, guided and unguided in detail.
27. Explain Full Duplex Mode of Communication.
28. Explain Half Duplex Mode of Communication.
29. Explain modes of data communication in detail with diagrams.
30. Explain Parallel Data Transmission.
31. Explain Serial Data Transmission.
32. Explain Simplex Mode of Communication.
33. Explain Synchronous Data Transmission.
34. Explain types of data transmission in detail with diagrams.
35. Explain Types of Signal with Diagram.
36. Explain Wireless Modem.
37. List different elements of data communication?
38. List three features of modem?
39. Name some bounded media?
40. What are digital signals?
41. What do you know about broadband?
42. What do you know about full duplex mode of data communication?
43. What is coaxial cable?
44. What is Communication Channel ?
45. What is communication Satellite?
46. What is decoder?
47. What is fiber optics?
48. What is meant by encoding of data?
49. What is meant by half duplex mode?
50. What is meant by parallel transmission?
51. What is receiver?
52. What is serial data transmission?
53. What is signal?
54. What is Unicode?
55. Write about external modem?
56. Write about modem?
Long Questions
1. What is data communication? Define the basic component of communication network.
2. Define the modem and its types.
3. Differentiate between Asynchronous and Synchronous.
4. Briefly explain the various communication media.
5. Define the Modem.
6. What is bandwidth? Explain bandwidth briefly.
7. Differentiate between guided media and unguided media.