Thursday, 21 January 2016

IBPS Exam : Computer Awareness Questions Bank -4

Here is the important expected Computer Awareness Questions Bank -4 for IBPS Bank PO/SO/Clerk, RRB, RBI Officer and Assistant Exam. These Computer Network Questions and Answers are must for every aspirants.

Q.91. Bluetooth operates on 2.4 GHz ISM band and its range is about 10 meters. 

Q.92. The PSTN term Local Loop refers to the wiring between the customer and end office of the telecom company. 

Q.93. In PSTN, in order for a modem customer to achieve 56 kbps transmission rate, the connection to ISP must be digital. 

Q.94. QAM stands for Quadrature Amplitude Modulation which means changing both Amplitude and Phase of the carrier. 

Q.95. In 128-QAM, one change in carrier transmits seven bits including parity. 

Q.96. In DMT which is employed in DSL, of 256 frequency channels 5 are not used to prevent interference between voice and data signals. 

Q.97. Original antialiasing filter is removed in DSL, but a pair of Low Pass Filter is still used to split voice and data channels in end office and in customer premises. a. ISDN stands for Integrated Services Digital Network. 

Q.98. In ISDN two standard services are provided; BRI and PRI. 

Q.99. A B channel in ISDN service has the data rate of 64 kbps whereas a D channel carries 16 kbps. 

Q.100. 23B+D configuration in ISDN is capable of carrying 1544 kbps. 

Q.101. Two features brought by gigabit ethernet, Carrier Extension, Frame Bursting are required to achieve 200 m in hub based networks. 

Q.102. Fast ethernet on Cat-5 cable runs at most 100 meters. 

Q.103. Hubs/Repeaters just repeat the incoming data and send it through all other connected lines. 

Q.104. Different modes of light travel different total distances resulting in dispersion which causes distortion in multimode fibers at long distances. 

Q.105. Multistation Access Unit is a term which refers to devices used to form a star topology in Token Ring. 

Q.106. FDDI stands for Fiber Distributed Data Interface. 

Q.107. In Token Ring there is at least one frame traveling around the ring, and it is called the Token. 

Q.108. The communication speed in FDDI is 100 Mbps. 

Q.109. Two common transmission rates in ATM are 155.52 Mbps and 622 Mbps. 

Q.110. In ATM systems delivery is not guaranteed but the order is. 

Q.111. Since the ATM cell size is 53 bytes ATM routers can be designed to be entirely hardware (no software). 

Q.112. In ATM, after the connection establishment between the source and destination, data always follow the same route which is called Virtual Circuit. 

Q.113. Fiber, among other common transmission media, has the best performance thanks to its high bandwidth and low EMI. 

Q.114. OSI stands for Open Systems Interface. 

Q.115. Service-point addressing (different number for each program) is the task of transport layer in OSI 7- layer model. 

Q.116. Signaling standards is in the interest of physical layer. 

Q.117. Ethernet bridges consist of physical and data-link layer(s). 

Q.118. In an ethernet network the interfaces are identified/addressed by their ethernet address/hardware address/MAC address. 

Q.119. The number of pins on a RJ-45 connector at the end of a cat-5 cable is 8. Q.120. In Differential Manchester represents the binary stream 001011.

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