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14th June 2016, 12:41 PM
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Join Date: Aug 2012
Re: HPCL Question Papers Computer Science

HPCL is one of the major integrated oil refining and marketing companies in India. It is a Mega Public Sector Undertaking (PSU) with Navaratna status

The HPCL is provides job to engineering students. Also provides job to computer science students.
HPCL Question Papers Computer Science








HPCL computer engineering questions with answers:

1. Which layer 1 devices can be used to enlarge the area covered by a single LAN segment?
Switch
NIC
Hub
Repeater
RJ45 transceiver
A.1 only
B.1 and 3
C.3 and 4
D.5 only
Answer: Option D

2. Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at
layer _____. Word processing operates at layer _____.
A.3, 3, 1, 7
B.3, 2, 1, none
C.3, 2, 1, 7
D.3, 3, 2, none
Answer: Option E

3. Which of the following describe router functions?
A.Packet switching
B.Packet filtering
C.Internetwork communication
D.Path selection
E.All of the above
Answer: Option E

4. Why does the data communication industry use the layered OSI reference model?It divides the network communication process into smaller and simpler components,
thus aiding component development, design, and troubleshooting. It enables equipment from different vendors to use the same electronic components, thus saving
research and development funds. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.
It encourages industry standardization by defining what functions occur at each layer of the model.
A.1 only
B.1 and 4
C.2 and 3
D.3 only
Answer: Option A


5. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
A.Send a different source port number.
B.Restart the virtual circuit.
C.Decrease the sequence number.
D.Decrease the window size.
Answer: Option E

7. What is the purpose of flow control?
A.To ensure that data is retransmitted if an acknowledgment is not received.
B.To reassemble segments in the correct order at the destination device.
C.To provide a means for the receiver to govern the amount of data sent by the sender.
D.To regulate the size of each segment.
Answer: Option A


8. Which three statements are true about the operation of a full-duplex Ethernet network?There are no collisions in full-duplex mode.A dedicated switch port is required for each full-duplex node. Ethernet hub ports are preconfigured for full-duplex mode.In a full-duplex environment, the host network card must check for the availability of the network media before transmitting. The host network card and the switch port must be capable of operating in full-duplex mode.
A.1, 2, and 5
B.2 and 4
C.2, 3 and 4
D.5 only
Answer: Option D

10. What are two purposes for segmentation with a bridge?To add more broadcast domains.
To create more collision domains.
To add more bandwidth for users.
To allow more broadcasts for users.
A.1 only
B.2 and 3
C.2 and 4
D.4 only
Answer: Option C

11. How does a host on an Ethernet LAN know when to transmit after a collision has occurred?In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.You can improve the CSMA/CD network by adding more hubs.After a collision, the station that detected the collision has first priority to resend the lost data. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.
A.1 and 3
B.2 and 4
C.1,3 and 4
D.2 and 5
Answer: Option C


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