HPCL - Computer Engineering Questions for Placement

HPCL – Computer Engineering Questions for Placement

• Explain the purpose of flow control?

a. To regulate the size of each segment
b. To ensure that data is retransmitted if an acknowledgement is not received
c. To provide a means for the receiver to govern the amount of data sent by the sender
d. To reassemble segments in the correct order at the destination device

• Choose the correct order when you encapsulate data?

a. Data, segment, packet, frame, bit
b. Data, frame, packet, segment, bit
c. Data, segment, frame, packet, bit
d. Segment, data, packet, frame, bit

• In between switches, which type of RJ45 UTP cable do you use?

a. Crossover cable
b. Straight – through
c. Crossover with a router in between the two switches
d. Crossover with a CSU/ DSU

• If you have to enlarge the area covered by a single LAN segment which layer 1 device will you use?

1. Hub
2. RJ45 transceiver
3. Switch
4. NIC
5. Repeater

a. Both 3 and 4
b. Only 5
c. Only 1
d. Both 1 and 3

• Choose the correct three statements out of the statements mentioned below which state about the operation of a full – duplex Ethernet network.

1. A dedicated switch port is required for each full – duplex node
2. There are no collisions in full duplex mode
3. The host network card and the switch port must be capable of operating in full duplex mode
4. Ethernet hub ports are preconfigured for full duplex mode
5. In a full duplex environment, the host network card must check for the availability of the network media before transmitting

a. Only 5
b. 1, 2 and 5
c. 2 and 4
d. 2, 3, and 4

• Choose the correct option that can use full duplex.

1. Host to host
2. Hub to hub
3. Switch to switch
4. Switch to hub
5. Switch to host

a. Both 3 and 4
b. 1, 2 and 4
c. Both 3 & 5
d. 2, 3 & 5

• At which layer of OSI model does segmentation of a data stream happen?

a. Network
b. Transport
c. Physical
d. Data link

• Choose the correct option to identify the unique characteristics of half duplex Ethernet visa viz to full duplex Ethernet.

1. Half duplex Ethernet has higher effective throughout
2. Half duplex Ethernet operates in a shared collision domain
3. Half duplex Ethernet has lower effective throughout
4. Half duplex Ethernet operates in a private collision domain

a. 1 & 4
b. 1, 2 & 3
c. Only 2
d. Only 4

• Choose the correct option and fill in the blanks which are numbered as ‘A’, ‘B’, ‘C’ and ‘D’ with the appropriate number of layer.

1. Routers operate at Layer - A
2. Ethernet hubs operate at layer - B
3. LAN switches operate at layer - C
4. Word processing operates at layer - D

a. 3, 3, 1, 7
b. 3, 2, 1, 7
c. 3, 2, 1 and none
d. 3, 3, 2 and none

• What can a host do to improve the reliability of this communication session when a receiving host has failed to receive the entire segment that it should acknowledge?

a. Restart the virtual circuit
b. Send a different source port number
c. Decrease the sequence number
d. Decrease the window size

• Choose the correct option that is a type of flow control

1. Windowing
2. Buffering
3. Cut – through
4. Congestion avoidance

a. Only 2
b. 1 & 2
c. Only 3
d. 1, 3 & 4

• Which OSI layer consists of characteristics like acknowledgement, flow control and sequencing?

a. Layer 4
b. Layer 2
c. Layer 3
d. Layer 7

• Which type of cabling swill you use to implement a network medium that is not susceptible to EMI?

a. Thinnet coax
b. Thicknet coax
c. Fibre – optic cable
d. Category 5 UTP cable

• Choose the two purposes from the below mentioned options to segment with a bridge.

1. To add more bandwidth for users
2. To add more broadcast domains
3. To allow more broadcast for users
4. To create more collision domains

a. Only 4
b. 2 & 3
c. Only 1
d. 2 & 4