VU Midterm Past Papers
199 solved midterm past paper MCQs for CS601 (Data Communication) at Virtual University, each with the correct answer marked. Use them to learn the VU question style and test your recall. An independent study tool — not affiliated with VU.
Prefer a summary first? Read the CS601 midterm handout.
Q1. What is the period of a Sine wave having frequency of 10 Hz?
Q2. In ________, both peak amplitude and frequency remains constant as the phase changes.
Q3. There are __________types of guided media.
Q4. ________ is responsible for governing node to node communication.
Q5. Terminal, microprocessor, computer, printer or any other device that generates or consumes digital data is known as ___________
Q6. Normally the value of Kmax in pure ALOHA is ________.
Q7. Sampling means measuring ____________ of signal at equal intervals
Q8. A sine wave is ___________.
Q9. The inversion of the level represents a 1 bit in ______ encoding
Q10. To make sure that source does not overwhelm destination by sending data faster than it can be handled and processed is called?
Q11. In which controlled-access method all data exchanges must be made through primary device even when the ultimate destination is a secondary device?
Q12. If a digital signal has "L" number of levels. ________ is the number of bits required to represent each level.
Q13. ________ category of coaxial cable is used for Cable TV.
Q14. Radio is an example of _______ signal conversion.
Q15. Analog To Analog Conversion Methods include ___________.
Q16. The original Ethernet technology with the data rate of 10 Mbps is called ________?
Q17. Which of the following is not a characteristic of a sine wave?
Q18. By using ___________ system, change in the file contents during file transmission can be avoided.
Q19. In order to find the location of two errors in an eight bit stream, we have to see ________ different combinations.
Q20. In CSMA/CA, ________ is the amount of time divided into slots.
Q21. ________ is used in the Stop-and-Wait protocol to overcome the issue of duplication.
Q22. Which one of the following is a correct-access method?
Q23. In the encoding where positive to negative transition is one and vice versa is zero.
Q24. If the window size is 63 in go-back N ARQ then what is the range of sequence number?
Q25. Following characteristics fully describe ___________, Amplitude Period/Frequency Phase
Q26. Digitizing an Analog Signal is called ___________.
Q27. At the CRC checker, ___________ means that the data unit is damaged.
Q28. Which one of the following is a Random-Access protocol?
Q29. Human voice is example of ___________ signal.
Q30. In statistical time division multiplexing, number of slots in frame are less than ________.
Q31. A ________ modem is used to connect two DTEs directly.
Q32. If we need to correct a single error in an 8-bit data unit, we need to consider ________ possible error locations.
Q33. Asynchronous TDM is efficient only when the size of the time slot is kept relatively ___________.
Q34. The ________ protocol uses both flow and error control.
Q35. In ________, each station is allocated a time slot during which it can send data.
Q36. The extra bits added with the original data for error detection/correction are called ________.
Q37. ________ is correct formula to determine the total number of ports needed for one system connected in a mesh network.
Q38. ________ is sometimes called the bit rate.
Q39. Collisions in CSMA/CA are avoided through ________.
Q40. ________ category of coaxial cable is used for thin Ethernet.
Q41. Which one is not the function of data link layer?
Q42. Session layer is responsible for _________.
Q43. ________ mode of serial transmission guarantees fixed rate of data.
Q44. Data Link layer provides services to the ________ layer.
Q45. The ________ is the number of signal elements sent per unit time.
Q46. The logical connection between the peer layers is ________ connection.
Q47. What is the period of a Sine wave having frequency of 5 Hz?
Q48. A sine wave is defined by ___________ characteristics.
Q49. 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.
Q50. S-frames in High-Level Data Link Control (HDLC) are only used to transfer ________ information.
Q51. The __________ generates the data and passes it along with any control information to a __________.
Q52. The type of ALOHA which improves the efficiency of Pure ALOHA is ________.
Q53. What is the period of a Sine wave having frequency of 2 Hz?
Q54. WDM stands for ________.
Q55. Latency is made of ________ components.
Q56. In line discipline after the data transmission, the sending system finishes with an ________ frame.
Q57. ________ of a signal is the collection of all the component frequencies it contains.
Q58. CHAP is an Authentication Protocol, which uses ________ process to authenticate user information.
Q59. RZ stands for ___________.
Q60. In ________ each band is reserved for a specific ststion, and it belongs to the station all the time.
Q61. In TCP/IP protocol suite, the process of adding header at each layer on sending side is known as ________.
Q62. In Block coding we divide our message into blocks of k bits called as ________.
Q63. In circuit switched networks we have low efficiency but minimal ________.
Q64. Error correction is more ________ than the error detection.
Q65. AM signal requires ___________ the BW of original signal
Q66. Asynchronous transmission is ___________.
Q67. The Internet is ___________.
Q68. Time division multiplexing is used in ________ systems.
Q69. Radio wave transmission utilizes ___________ different types of propagation.
Q70. Checksum is an error-detection technique that can be applied to a message of ________ length.
Q71. At the Application layer, object/information is in the form of ________.
Q72. POST stand for ________?
Q73. Which of the following statement is correct?
Q74. In selective-reject ARQ, only the specific damaged or lost frame is ________.
Q75. In ASK correct formula for calculating the bandwidth ia as ________.
Q76. Encoding digital data into digital signals is called ___________.
Q77. If the Hamming distance between sent and received code word is ________, then it shows that received data is corrupted.
Q78. Quadrature Amplitude Modulation (QAM) is the combination of ________ and ________.
Q79. ________ works with topologies in which one drvice is designated as a primary station and the other devices are secondary stations.
Q80. No matter whether the link is dedicated or broadcast, data link control (DLC) layer provides services between ________.
Q81. CDMA stands for ________.
Q82. GO-BACK-N protocol is one of the ________ layer protocols, which is used to control the flow of data during the transmission.
Q83. In ___________ a dedicated communication path is established between two stations through the nodes of the network
Q84. Signals travel through fiber optic cable are in the form of ________.
Q85. ________ contains a repeater.
Q86. In frequency shift keying, ________ remain(s) constant.
Q87. ________ is/are un-reliable protocol(s).
Q88. ________ is not a function of Data Link Control.
Q89. Each computer on the Internet has a unique numeric address called a(n) ___________.
Q90. dB is negative if a signal is ___________.
Q91. We can have ________ different groups with a 4 bit block.
Q92. Line Configuration refers to the way two or more devices attach to a ___________.
Q93. Error detection and correction are the services provided by ________ layer.
Q94. Which of the following sublyer resolves the contention for the shared media.
Q95. In pure ALOHA, vulnerable time is_______the frame transmission time.
Q96. Which one of the following is a correct controlled access method?
Q97. _______Works with topologies in which one device is designated as a primary station and other devices are secondary stations.
Q98. In ________Each band is reserved for a specific station, time and it belongs to the station all the time.
Q99. In_________each station is forced to send a frame only at the beginning of time slot.
Q100. A personal computer or workstation on an Ethernet network must have______ card.
Q101. In the context of Ethernet implementations, maximum medium length of 10 Base F was________ meters.
Q102. What was the main drawback in Aloha Random-Access method?
Q103. MAC address is of _________.
Q104. Posts stand for
Q105. ________Random access method was initially designed for a radio wireless LAN but it Can be used on any shared medium now.
Q106. In ________ each station stands a frame whenever it has a frame to send.
Q107. In which controlled-access method all data exchanges must be made through primary devices even when the ultimate destination is a secondary device?
Q108. Which of the following is a Random-Access protocol?
Q109. Transmission technology second(based on Ethernet) provides a data rate of 1 billion bits per second.
Q110. In Ethernet the source address field in the MAC frame is the _______address.
Q111. _______was used as the medium in 10 Base-T.
Q112. In telephone network POP stand for_______?
Q113. In Ethernet frame, both destination and sender addresses are of length _______.
Q114. When we represent the data in CDMA, if a ststement is idle then it sends_________ .
Q115. ________ use fiber optic cable.
Q116. ________ Uses thick coaxial cable.
Q117. In_______ a station monitors the medium after it sends a frame to see if the transmission is successful.
Q118. Ethernet address is if _________ bytes.
Q119. Fast Ethernet has data rate of _______Mbps.
Q120. In context of Ethernet address the source address is always a _______ address.
Showing the first 120 of 199 MCQs.