Data Communication (CS601)

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

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

2. 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)

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

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

4. POST stand for ________?

   1. Plain Old Telephone Set
   2. Plain Old Time Sharing
   3. Plain Old Telephone System
   4. Plain Old Telephone Service

5. In CSMA/CA, ________ is the amount of time divided into slots.

   1. Interframe Window
   2. Contention Window
   3. Fragmented Window
   4. Collided Window

6. 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

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

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

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

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

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

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

10. 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

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

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

12. ________ is/are un-reliable protocol(s).

    1. IP and TCP
    2. UDP
    3. IP and UDP
    4. TCP

13. 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

14. Transmission Control Protocol is a(n) ________ layer protocol.

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

15. 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

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

    1. True
    2. False

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

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

18. In which controlled-access method all data exchanges must be made through primary device even when the ultimate destination is a secondary device?

    1. Polling
    2. Reservation
    3. Token Passing
    4. Port Forwarding

19. 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

20. dB is negative if a signal is ___________.

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

21. 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

22. 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

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

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

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

    1. true
    2. false

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

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

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

    1. true
    2. false

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

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

28. CDMA stands for ________.

    1. Carrier Division Multiple Access
    2. Carrier Data Multiple Access
    3. Code Data Multiple Access
    4. Code Division Multiple Access

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

    1. True
    2. False

30. 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)

31. 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

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

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

33. 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

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

    1. True
    2. False

35. 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

36. 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

37. 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

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

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

39. 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

40. ________ works with topologies in which one drvice is designated as a primary station and the other devices are secondary stations.

    1. Reservation
    2. Polling
    3. Token
    4. None of the given

41. 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

42. 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

43. Digital signals are refered to be ___________.

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

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

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

45. ________ 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

46. 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

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

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

48. 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

49. Time division multiplexing is used in ________ systems.

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

50. 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

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

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

52. Session layer is responsible for _________.

    1. Reassembly of data
    2. Maintaining the connection

53. 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

54. In ________, each station is allocated a time slot during which it can send data.

    1. CDMA
    2. NDMA
    3. TDMA
    4. FDMA

55. 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

56. There are __________types of guided media.

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

57. 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

58. 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

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

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

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

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

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

    1. Circuit switching
    2. Packet switching

62. AM signal requires ___________ the BW of original signal

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

63. 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

64. The type of ALOHA which improves the efficiency of Pure ALOHA is ________.

    1. Slotted ALOHA
    2. Upper ALOHA
    3. Integrated ALOHA
    4. Lower ALOHA

65. 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

66. 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

67. 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

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

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

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

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

70. 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

71. There are _________ types of serial transmission.

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

72. ________ 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

73. 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

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

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

75. 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

76. Which one of the following is a Random-Access protocol?

    1. TDMA
    2. CDMA/CD
    3. ALOHA
    4. CDMA/CA

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

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

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

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

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

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

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

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

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

    1. True
    2. False

82. Asynchronous transmission is ___________.

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

83. 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

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

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

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

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

86. 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

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

    1. true
    2. false

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

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

89. 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

90. Analog signals are refers to be ___________

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

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

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

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

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

93. 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

94. 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

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

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

96. 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

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

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

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

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

99. 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

100. 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

101. 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

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

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

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

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

104. Normally the value of Kmax in pure ALOHA is ________.

     1. 25
     2. 10
     3. 15
     4. 30

105. Radio is an example of _______ signal conversion.

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

106. Sampling means measuring ____________ of signal at equal intervals

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

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

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

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

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

109. PSK is susceptible to the noise degradation.

     1. True
     2. False

110. 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

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

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

112. YMODEM has ________ Byte of data unit.

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

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

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

114. There are ________ basic categories of multiplexing.

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

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

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

116. 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

117. 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

118. 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

119. In the ________ method, the stations in a network are orgamized in a logical ring.

     1. Token-passing
     2. Polling
     3. Reservation
     4. None of the given

120. 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

121. Central Hub in a Tree is an ___________.

     1. Active hub
     2. passive hub

122. Latency is made of ________ components.

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

123. 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

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

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

125. ________ relatively measures the strength of two signals.

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

126. 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

127. 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

128. 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

129. 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

130. ________ 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

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

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

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

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

133. Which one of the following is not a Channelization Protocol?

     1. FDMA
     2. CSMA
     3. CDMA
     4. TDMA

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

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

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

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

136. 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

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

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

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

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

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

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

140. In ________, each station sends a frame whenever it has a frame to send.

     1. Slotted ALOHA
     2. Fragmented ALOHA
     3. Pure ALOHA
     4. None of the given

141. ________ 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

142. 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

143. ________ encoding is almost obsolete today

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

144. What was the main draw back in ALOHA Random-Access method?

     1. Redundancy in Data
     2. Potential Collision
     3. Inconsistent Data rate
     4. All of the given

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

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

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

     1. Transport Layer
     2. Session Layer

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

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

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

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

149. 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

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

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

151. Which one of the following is a correct-access method?

     1. Polling
     2. Token Passing
     3. Reservation
     4. All of the given

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

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

153. ________ is sometimes called the bit rate.

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

154. 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

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

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

156. A sine wave is defined by ___________ characteristics.

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

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

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

158. WDM stands for _________.

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

159. 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

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

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

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

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

162. ________ transmission technology (based on Ethernet) provides a data rate of 1 billion bits per second.

     1. Fast Ethernet
     2. Standard Ethernet
     3. Gigabit Ethernet
     4. 10BASE-T Ethernet

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

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

164. 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

165. ________ contains a repeater.

     1. Active hub
     2. Passive hub

166. DLC in Data Link Layer stands for ________.

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

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

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

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

     1. true
     2. false

169. Human voice is example of ___________ signal.

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

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

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

171. In ________ each band is reserved for a specific ststion, and it belongs to the station all the time.

     1. FDMA
     2. CDMA
     3. TDMA
     4. CSMA

172. In ASK, Noise usually affects the ________.

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

173. WDM stands for ________.

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

174. Possession of TOKEN gives the station the right to ________.

     1. Modify the data
     2. Send the data
     3. Delete the data
     4. Receive the data

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

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

176. 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

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

     1. Yes
     2. No

178. 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

179. A sine wave is ___________.

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

180. RZ stands for ___________.

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

Select a course code for Objective Questions:

ACC311 ACC501 BIF101 BIF401 BIF501 BIO101 BIO201 BIO202 BIO203 BIO204 BIO301 BIO302 BIO303 BIO401 BIO503 BNK603 BT101 BT201 BT301 BT302 BT401 BT402 BT403 BT404 BT405 BT406 BT501 BT504 BT505 BT604 CHE201 CHE301 CS001 CS101 CS201 CS202 CS204 CS301 CS302 CS304 CS311 CS401 CS402 CS403 CS408 CS501 CS502 CS504 CS506 CS508 CS601 CS602 CS604 CS605 CS607 CS609 CS610 CS614 CS707 CS710 ECO401 ECO402 ECO403 ECO404 EDU302 EDU401 EDU402 EDU501 EDU601 ENG101 ENG201 ENG301 ENG501 FIN611 FIN624 FIN625 ISL201 IT430 MCM101 MCM301 MGMT623 MGT101 MGT211 MGT301 MGT401 MGT402 MGT501 MGT502 MGT503 MGT510 MGT601 MGT603 MKT501 MKT610 MKT630 MTH101 MTH202 MTH302 MTH501 MTH601 MTH634 PAK301 PHY101 PHY301 PSY101 PSY403 PSY502 PSY512 SOC101 SOC301 SOC401 STA301 STA630 STA641 ZOO102 ZOO401 ZOO501 ZOO502 ZOO503 ZOO504 ZOO505 ZOO506 ZOO510 ZOO630

Select a course code for Subjective Questions:

ACC311 CS001 CS101 CS201 CS301 CS607 CS701 CS702 CS703 CS704 CS707 CS708 CS710 CS711 CS718 CS721 CS724 ECO401 ECO403 ENG101 ENG301 MGT703 MTH501 STA301