cs601 grand quiz file

 

cs601 mcq file

DOWNLOAD FILE

1. To calculate the data rate for noisy channel ________ formula is used.

   1. Shannon
   2. Nyquist
   3. Propagation
   4. Greedy

2. The ________ protocol uses both flow and error control.

   1. TCP/IP
   2. HDLC
   3. ICMP
   4. Stop-and-Wait

3. In order to find the location of two errors in an eight bit stream, we have to see ________ different combinations.

   1. 28
   2. 16
   3. 8
   4. 4

4. If duration of noise is decreased during a transmission over noisy channel, fixed data rate of the channel will cause ________ number of bits being impacted by the noise.

   1. Constant
   2. More
   3. Less
   4. Zero

5. In line discipline after the data transmission, the sending system finishes with an ________ frame.

   1. EOT
   2. EKT
   3. ENT
   4. ESP

6. GO-BACK-N protocol is one of the ________ layer protocols, which is used to control the flow of data during the transmission.

   1. Physical
   2. Network
   3. Presentation
   4. Data link

7. To control and manage the transfer of data, a protocol called Point to Point Protocol (PPP) is used at the ________ layer.

   1. Physical
   2. Network
   3. Presentation
   4. Data link

8. ________ encoding is almost obsolete today

   1. Bipolar
   2. Unipolar
   3. Polar
   4. None of the given

9. WDM stands for ________.

   1. Wideband De-Modulation
   2. Worst Data Manipulation
   3. Wavelength Division Multiplexing
   4. None of the given

10. ________ category of coaxial cable is used for thin Ethernet.

    1. RG-58
    2. RG-59
    3. RG-1
    4. RG-47

11. ________ of a signal is the collection of all the component frequencies it contains.

    1. Time domain
    2. Frequency domain
    3. Frequency spectrum
    4. None of the given

12. Congestion Control is a feature of layer(s).

    1. Data Link
    2. Network
    3. Transport
    4. All mentioned

13. There are ________ basic categories of multiplexing.

    1. 2
    2. 3
    3. 7
    4. 5

14. The original Ethernet technology with the data rate of 10 Mbps is called ________?

    1. Standard Ethernet
    2. Fast Ethernet
    3. Gigabit Ethernet
    4. 10 Gigabit Ethernet

15. RZ stands for ___________.

    1. Return to Z
    2. Retire a Zero
    3. Return ot Zero
    4. None of the given

16. Which of the following sublyer resolves the contention for the shared media.

    1. MAC
    2. LLC
    3. Physical
    4. None of the given.

17. Traditionally MANs have been implemented using one of the 2 technologies, Circuit Switching and Packet Switching

    1. true
    2. false

18. Following characteristics fully describe ___________,
    Amplitude
    Period/Frequency
    Phase

    1. Sine Waves
    2. Digital Signals
    3. Aperiodic Signals
    4. None of the given

19. Quadrature Amplitude Modulation (QAM) is the combination of ________ and ________.

    1. FSK, PSK
    2. PSK, FSK
    3. ASK, PSK
    4. ASK, FSK

20. ________ is responsible for governing node to node communication.

    1. Application Layer
    2. Session Layer
    3. Data Link layer
    4. Presentation Layer

21. Guard bands are used in ________ multiplexing technique, to avoid overlapping of frequency bands assigned to each user.

    1. PDM
    2. CSMA
    3. TDM
    4. FDM

22. Which error detection method uses one's complement arithmetic.

    1. Cyclic Redundancy Check (CRC)
    2. Longitudinal Red Check (LRC)
    3. Checksum
    4. Simple Parity Check

23. The ________ is the number of signal elements sent per unit time.

    1. Data rate
    2. Signal rate
    3. Bit rate
    4. Period

24. A broadcast signal is received by the orbiting satellites which rebroadcasts ________.

    1. to the resender
    2. to the sender
    3. to the atmosphere
    4. none of the given

25. In TCP/IP protocol suite, the process of adding header at each layer on sending side is known as ________.

    1. Encapulation
    2. De-encapulation
    3. Packetizing
    4. Framing

26. The __________ generates the data and passes it along with any control information to a __________.

    1. DTE, DCE
    2. DCE, DTE
    3. DTE, DTE
    4. DCE, DCE

27. ________ signal can take infinite levels of intensity over time.

    1. Digital
    2. Discrete
    3. Analog
    4. Logical

28. VCI address is ________ address in virtual circuit approach.

    1. Private
    2. Variable
    3. Local
    4. Global

29. Radio wave transmission utilizes ___________ different types of propagation.

    1. Two
    2. Three
    3. Four
    4. Five

30. ________ contains a repeater.

    1. Active hub
    2. Passive hub

31. Sampling means measuring ____________ of signal at equal intervals

    1. Amplitudes
    2. Frequencies
    3. Phases
    4. None of the given

32. At the CRC checker, ___________ means that the data unit is damaged.

    1. A string of 0s
    2. A string of 1s
    3. A string of alternating 1s and 0s
    4. A nonzero remainder

33. The transmission medium that carries the message is referred to as the ___________.

    1. send and receive device
    2. communication channel
    3. protocol
    4. gateways

34. ________ category of coaxial cable is used for Cable TV.

    1. RG-58
    2. RG-59
    3. RG-11
    4. RG-47

35. What is the frequency of a sine wave if it completes one cycle in 2 seconds?

    1. 0.5
    2. 0.6
    3. 0.3
    4. 0.2

36. In ASK, both ______ and ________ remain constant.

    1. Amplitude, Frequency
    2. Amplitude, phase
    3. Frequency, Phase
    4. Amplitude, Samples

37. Which of the following consist of just one redundant bit per data unit?

    1. Two dimentional Parity check.
    2. CRC
    3. Simple Parity Check
    4. Checksum

38. BSC supports ___________ transmission using ___________ flow control.

    1. Full-duplex, Stop and wait ARQ
    2. Half-duplex, Selective reject ARQ
    3. Full-duplex, Selective reject ARQ
    4. Half-duplex, Stop and wait ARQ

39. Is there any difference between Data communication and telecommunication are network?

    1. Yes
    2. No

40. Digitizing an Analog Signal is called ___________.

    1. Analog-to-Digital Conversion
    2. Digital-to-Digital Conversion
    3. Digital-to-Analog Conversion
    4. None of the given

41. In _________, a signal is directed straight from antenna to antenna.

    1. Line of sight propagation
    2. Ground propagation
    3. Space propagation
    4. Tropospheric propagation

42. Terminal, microprocessor, computer, printer or any other device that generates or consumes digital data is known as ___________

    1. DCE
    2. DTE
    3. DCE & DTE
    4. None of the given

43. In circuit switched networks we have low efficiency but minimal ________.

    1. Delay
    2. Speed
    3. Throughput
    4. Errors

44. ________ is used in the Stop-and-Wait protocol to overcome the issue of duplication.

    1. Frame sequencing
    2. Acknowledgement numbering
    3. Counter and Timer reset
    4. Frame sequencing and Acknowledgement numbering

45. ________ relatively measures the strength of two signals.

    1. Signal rate
    2. Bit rate
    3. Decibel
    4. Pulse Rate

46. Asynchronous TDM is efficient only when the size of the time slot is kept relatively ___________.

    1. Large
    2. Small
    3. Medium
    4. Zero

47. What is the period of a Sine wave having frequency of 5 Hz?

    1. 0.2
    2. 0.1
    3. 0.5
    4. 0.3

48. In statistical time division multiplexing, number of slots in frame are less than ________.

    1. Output data rate
    2. Input lines
    3. Input frequency
    4. Multiplexed T lines

49. dB is negative if a signal is ___________.

    1. Attenuated
    2. Distorted
    3. Amplified
    4. Noisy

50. In Block coding scheme, number of code words is always ________ data words.

    1. Less than
    2. Equal to
    3. Greater than
    4. Same as

51. ________ is the rate of change with respect to time.

    1. Voltage
    2. Time
    3. Frequency
    4. Amplitude

52. If the window size is 63 in go-back N ARQ then what is the range of sequence number?

    1. 0 to 63
    2. 0 to 64
    3. 1 to 63
    4. 1 to 64

53. Which error detection method consists of a parity bit for each unit as well as an entire data unit of parity bits?

    1. Checksum
    2. Cyclic Redundancy Check (CRC)
    3. Longitudinal Red Check (LRC)
    4. Vertical Redundancy Check (VRC)

54. A fiber -optic cable transmit signals in the form of ________.

    1. Light
    2. Sound
    3. Wave
    4. None of the given

55. A portion of the path that carries TX between a given pair of devices is known as ___________.

    1. Direct Point
    2. Bridge
    3. Channel
    4. Access Point

56. In Block coding we divide our message into blocks of k bits called as ________.

    1. Code words
    2. Data words
    3. Passwords
    4. Cross words

57. Mr. Asif while sitting in Lahore is talking with his friend in Dubai through Skype is an example of ________.

    1. Local Area Network
    2. Metropolitan Area Network
    3. Wide Area Network
    4. Home Based Network

58. A sine wave is ___________.

    1. periodic and discrete
    2. aperiodic and discrete
    3. periodic and continuous
    4. aperiodic and continuous

59. Which of the following is most affected by noise?

    1. PSK
    2. ASK
    3. FSK
    4. QAM

60. In ASK correct formula for calculating the bandwidth ia as ________.

    1. B=(1+d)S
    2. B=(1*d)S
    3. B=(d-1)S
    4. B=(d-5)S

61. Line Configuration refers to the way two or more devices attach to a ___________.

    1. Path
    2. Circuit
    3. Link
    4. Router

62. ________ is normally used where speed is priority in data transfer.

    1. Serial data transmission
    2. Hybrid data transmission
    3. Parallel data transmission
    4. Both parallel and serial data transmission

63. Quantization is a method of assigning ________ values in a specific range to sampled instances.

    1. Negative
    2. Positive
    3. Binary
    4. Integral

64. A ________ modem is used to connect two DTEs directly.

    1. 'NULL
    2. Cable
    3. DSL
    4. None of the given

65. If we need to correct a single error in an 8-bit data unit, we need to consider ________ possible error locations.

    1. 16
    2. 2
    3. 4
    4. 8

66. Error detection and correction are the services provided by ________ layer.

    1. Data link layer
    2. Application layer
    3. Physical layer
    4. Session layer

67. WDM stands for _________.

    1. Wave Division Multiplexing
    2. Wrong Division Multiplexing
    3. Well Division Multiplexing
    4. West Division Multiplexing

68. Digital signals are refered to be ___________.

    1. Continuous
    2. Discrete
    3. All of the given
    4. None of the given

69. ________ is correct formula to determine the total number of ports needed for one system connected in a mesh network.

    1. N+1
    2. N-1
    3. N(N+1)
    4. NxN

70. No matter whether the link is dedicated or broadcast, data link control (DLC) layer provides services between ________.

    1. Virtual LANs
    2. Two adjacent nodes
    3. Ethernet links
    4. Source and destination PCs

71. Two or more computers connected so that they can communicate with each other and share information is called a ___________.

    1. satellite
    2. protocol
    3. broadcast
    4. network

72. What is the frequency of a sine wave if it completes one cycle in 5 seconds?

    1. 0.5
    2. 0.6
    3. 0.3
    4. 0.2

73. The level of signal is always positive in NRZ encoding.

    1. true
    2. false

74. CHAP is an Authentication Protocol, which uses ________ process to authenticate user information.

    1. Two-way
    2. Three-way
    3. Four-way
    4. Five-way

75. Analog refers to something that is continuous in ___________.

    1. Time
    2. Space
    3. Frequency
    4. None of the given

76. Analog To Analog Conversion Methods include ___________.

    1. AM, PM and FM
    2. AM, FSK and PM
    3. AM, PM and QAM
    4. None of the given

77. In analog transmission, the base signal is called the________.

    1. Carrier Signal
    2. Analog signal
    3. Digital signal
    4. Modulated signal

78. Switch is a network device which operates on the ________ layer of the TCP/IP protocol suite.

    1. Application
    2. Transport
    3. Presentation
    4. Data link

79. S-frames in High-Level Data Link Control (HDLC) are only used to transfer ________ information.

    1. User data
    2. Control
    3. Redundant
    4. Original

80. In Pure ALOHA, the vulnerable time is ________ the frame transmission time.

    1. Same as
    2. Two times
    3. Three times
    4. Four times

81. What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 300, 600, 900 and 1200?

    1. 100
    2. 900
    3. 300
    4. 600

82. Error correction is more ________ than the error detection.

    1. Easy
    2. Useless
    3. Informal
    4. Difficult

83. Human voice is example of ___________ signal.

    1. Digital
    2. Analog
    3. Discrete
    4. None of the given

84. ________ are used to exchange session management and control information between connected devices.

    1. I-frames
    2. U-frames
    3. S-frames
    4. N-frames

85. Radio is an example of _______ signal conversion.

    1. Analog to analog
    2. Analog to digital
    3. Digital to Digital
    4. Digital to analog

86. The logical connection between the peer layers is ________ connection.

    1. Physical
    2. Direct
    3. Indirect
    4. Tangible

87. There are _________ types of serial transmission.

    1. 3
    2. 4
    3. 2
    4. None of the given

88. ________ is an Authentication Protocol, which is used by the PPP to authenticate passwords.

    1. CHAP
    2. PAP
    3. LCP
    4. ICMP

89. There are __________types of guided media.

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

90. In OSI model headers are added at layer _________.

    1. 1,2,3 only
    2. 6,5,7 only
    3. 5,4,3 only
    4. 6,5,4,3,2 only

91. We can have ________ different groups with a 4 bit block.

    1. 4
    2. 8
    3. 16
    4. 32

92. If users must take turns using the link, then it is called Spatial Sharing.

    1. true
    2. false

93. Like Data link layer, ___________ is also responsible for Flow control.

    1. Transport Layer
    2. Session Layer

94. Latency is made of ________ components.

    1. Two
    2. Three
    3. Four
    4. Five

95. A sine wave is defined by ___________ characteristics.

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

96. By using ___________ system, change in the file contents during file transmission can be avoided.

    1. Routing
    2. Flow Control
    3. Error Detection and Correction
    4. Congestion Control

97. The flag in PPP is a byte that needs to be ________ whenever it appears in the data section of the frame.

    1. Duplicated
    2. Blocked
    3. Cleaned
    4. Escaped

98. Session layer is responsible for _________.

    1. Reassembly of data
    2. Maintaining the connection

99. Like 10 Base 5, 10 Base 2 is a ________ topology LAN.

    1. Ring
    2. Mesh
    3. Star
    4. Bus

100. What is the period of a Sine wave having frequency of 10 Hz?

     1. 0.2
     2. 0.1
     3. 0.5
     4. 0.3

101. Central Hub in a Tree is an ___________.

     1. Active hub
     2. passive hub

102. In frequency shift keying, ________ remain(s) constant.

     1. Frequency
     2. Amplitude
     3. Both Amplitude and Phase
     4. Both Phase and Frequency

103. At the CRC generator, ___________ added to the data unit before the divisional process.

     1. 0s are
     2. 1s are
     3. a polynomial is
     4. a CRC remainder is

104. If a digital signal has "L" number of levels. ________ is the number of bits required to represent each level.

     1. Log L
     2. Log Base 2 L
     3. L Square
     4. Log(2*L)

105. ________ is sometimes called the bit rate.

     1. signal rate
     2. modulation rate
     3. Data rate
     4. pulse rate

106. The message 1110 sent by a source is received by a destination as 1011. This is ________ type of error.

     1. Burst
     2. Single-Bit
     3. Uni-Bit
     4. Hamming

107. Which layer is concerned with the syntax and semantics of info exchange between two systems?

     1. Physical
     2. Application
     3. Session
     4. Presentation

108. ________ is an Authentication Protocol, which uses two-step process to authenticate user information.

     1. CHAP
     2. LCP
     3. PAP
     4. ICMP

109. Asynchronous transmission is ___________.

     1. Slow
     2. Fast
     3. Costly
     4. None effective

110. Collisions in CSMA/CA are avoided through ________.

     1. The Interframe Space
     2. The Contention Window
     3. Acknowledgements
     4. All of the given

111. To make sure that source does not overwhelm destination by sending data faster than it can be handled and processed is called?

     1. Addressing & Routing
     2. Exchange Management
     3. Flow Control
     4. Recovery

112. The Internet is ___________.

     1. software for sending e-mail around the world
     2. a government-owned agency that links computers
     3. a global network of computers networks
     4. a specialised form of local area network

113. Which of the following statement is correct?

     1. Digital signals are less prone to Noise
     2. Digital signals are highly prone to Noise
     3. Analog Signals are less prone to Noise
     4. Digital signals are not affected by Noise

114. Signals travel through fiber optic cable are in the form of ________.

     1. Light
     2. Bits
     3. Electromagnetic
     4. Bytes

115. Encoding digital data into digital signals is called ___________.

     1. Analog-to-Digital Conversion
     2. Digital-to-Digital Conversion
     3. Digital-to-Analog Conversion
     4. None of the given

116. Flow control is needed to prevent ________.

     1. Bit errors
     2. Overflow of the sender buffer
     3. Overflow of the receiver buffer
     4. Collision between sender and receiver

117. In the encoding where positive to negative transition is one and vice versa is zero.

     1. Manchester
     2. Differential Manchester
     3. All of the given
     4. None of given

118. Baud rate is greater than or equal to the bit rate.

     1. True
     2. False

119. What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 200, 400, 600 and 800?

     1. 100
     2. 500
     3. 300
     4. 600

120. In Pulse Code Modulation (PCM), the sampling is dependent on ________.

     1. Time
     2. Amplitude
     3. Frequency
     4. Signal Rate

121. The extra bits added with the original data for error detection/correction are called ________.

     1. Fault bits
     2. Port numbers
     3. Redundant bits
     4. Process IDs

122. In ASK, Noise usually affects the ________.

     1. Amplitude
     2. Phase
     3. Sample
     4. Frequency

123. The inversion of the level at 1 bit is called as ________.

     1. NRZ-L
     2. NRZ-I
     3. RZ
     4. None of the given.

124. In an analog hierarchy to carry voice channels, a group can carry ________ voice channels.

     1. 60
     2. 12
     3. 20
     4. 10

125. In even parity check code, the value of syndrome is ________ if the number of 1s is even.

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

126. There are three types of Hubs that exist. Which of the following options correctly describes these three?

     1. Passive, dormant, special
     2. Active , dormant , passive
     3. Passive, Active, Turbo
     4. Passive, Active, Intelligent

127. The term _______means that only one bit of a given data unit is changed from 1 to 0 or from 0 to 1.

     1. Packet Error
     2. Burst Error
     3. Single Bit Error
     4. Character Error

128. Analog signals are refers to be ___________

     1. Continuous
     2. Discrete
     3. Periodic
     4. Aperiodic

129. Data is transmitted using light through a ___________ cable.

     1. twisted pair
     2. fiber-optic
     3. coaxial
     4. microwave

130. STP is more expensive than UTP and is less susceptible to noise.

     1. True
     2. False

131. If the Hamming distance between sent and received code word is ________, then it shows that received data is corrupted.

     1. ≠ 0
     2. = 0
     3. ≠ 1
     4. = 1

132. Time division multiplexing is used in ________ systems.

     1. Analog
     2. Hybrid
     3. Digital
     4. Automated

133. In ___________ a dedicated communication path is established between two stations through the nodes of the network

     1. Circuit switching
     2. Packet switching

134. What is the period of a Sine wave having frequency of 2 Hz?

     1. 0.2
     2. 0.1
     3. 0.5
     4. 0.3

135. Time domain plot show changes in signal phase with respect to time.

     1. true
     2. false

136. The most common type of connector used by coaxial cable is ________.

     1. BNC
     2. RJ-45
     3. RJ-11
     4. RJ-57

137. ________ is the process of converting digital data to digital signals.

     1. CSMA/CD
     2. CSMA/CA
     3. Line coding
     4. Segmentation

138. Which one is not the function of data link layer?

     1. Line discipline
     2. Flow control
     3. Error control
     4. Network control

139. In CRC there is no error if the remainder at the receiver is _______.

     1. Equal to the remainder at the sender
     2. Zero
     3. Nonzero
     4. The quotient at the sender

140. PSK is susceptible to the noise degradation.

     1. True
     2. False

141. Which level of the TCP/IP reference model routes data/information across a network channel?

     1. Application Layer
     2. Data Link Layer
     3. Transport Layer
     4. Network Layer

142. Time domain shows changes in ___________.

     1. time w.r.t signal amplitude
     2. signal amplitude w.r.t time
     3. time
     4. All of the given

143. ________ is not a function of Data Link Control.

     1. Framing
     2. Modulation
     3. Error Control
     4. Flow Control

144. Each computer on the Internet has a unique numeric address called a(n) ___________.

     1. domain address
     2. protocol address
     3. IP address
     4. Web address

145. Checksum is an error-detection technique that can be applied to a message of ________ length.

     1. Exactly 4
     2. Exactly 8
     3. Exactly 32
     4. Any

146. The flag in PPP is a byte that needs to be ________ whenever it appears in the data section of the frame.

     1. Duplicated
     2. Blocked
     3. Cleaned
     4. Escaped

147. The logical connection between the peer layers is ________ connection.

     1. Physical
     2. Direct
     3. Indirect
     4. Tengible

148. AM signal requires ___________ the BW of original signal

     1. Twice
     2. Half
     3. Same
     4. Three Times

149. TROPOSHERE is the layer of atmosphere above the troposhere but below space

     1. True
     2. False

150. ________ mode of serial transmission guarantees fixed rate of data.

     1. Synchronous
     2. Asynchronous
     3. Isochronous
     4. Metasochronous

151. At the Application layer, object/information is in the form of ________.

     1. Message
     2. Packet
     3. Segment
     4. Frame

152. Data Link layer provides services to the ________ layer.

     1. Application
     2. Transport
     3. Network
     4. Session

153. The inversion of the level represents a 1 bit in ______ encoding

     1. NRZ-I
     2. NRZ-L
     3. RZ
     4. Manchester

154. DLC in Data Link Layer stands for ________.

     1. Divide Line Communication
     2. Data Line Code
     3. Data Link Control
     4. Demand Link Coordination

155. YMODEM has ________ Byte of data unit.

     1. 1024
     2. 256
     3. 128
     4. 512

156. In Synchronous TDM, Time slots are not same in number as input devices.

     1. True
     2. False

157. In selective-reject ARQ, only the specific damaged or lost frame is ________.

     1. Retransmitted
     2. Forwarded
     3. Selected
     4. Rejected

158. Low pass channel has ________ bandwidth between two stations.

     1. Dedicated
     2. Shared
     3. Multiplexed
     4. Infinite

159. In ________, both peak amplitude and frequency remains constant as the phase changes.

     1. PSK
     2. QAM
     3. Both PSK & QAM
     4. None of the given

160. Which of the following is not a characteristic of a sine wave?

     1. Amplitude
     2. Segmentation
     3. Phase
     4. Frequency