ISRO CS 2009

Question 1

The subnet mask for a particular network is 255.255.31.0. Which of the following pairs of IP addresses could belong to this network?

• 172.57.88.62 and 172.56.87.23
• 10.35.28.2 and 10.35.29.4
• 191.203.31.87 and 191.234.31.88
• 128.8.129.43 and 128.8.161.55

Question 2

The address resolution protocol (ARP) is used for

• Finding the IP address from the DNS
• Finding the IP address of the default gateway
• Finding the IP address that corresponds to a MAC address
• Finding the MAC address that corresponds to an IP address

Question 3

Which of the following is a MAC address?

• 192.166.200.50
• 00056A:01A01A5CCA7FF60
• 568, Airport Road
• 01:A5:BB:A7:FF:60

Question 4

What is the primary purpose of a VLAN?

• Demonstrating the proper layout for a network
• Simulating a network
• To create a virtual private network
• Segmenting a network inside a switch or device

Question 5

Advanced Encryption Standard (AES) is based on

• Asymmetric key algorithm
• Symmetric key algorithm
• Public key algorithm
• Key exchange

Question 6

The primary purpose of an operating system is

• To make most efficient use of the computer hardware
• To allow people to use the computer
• To keep systems programmers employed
• To make computers easier to use

Question 7

Which is the correct definition of a valid process transition in an operating system?

• Wake up: ready → running
• Dispatch: ready → running
• Block: ready → running
• Timer runout: ready → running

Question 8

The correct matching of the following pairs is

(A) Disk check              (1) Roundrobin
(B) Batch processing        (2) Scan
(C) Time sharing            (3) LIFO
(D) Stack operation         (4) FIFO

• A B C D
   3 4 2 1
  

• A B C D
  4 3 2 1
  

• A B C D
  3 4 1 2
  

• A B C D
  2 4 1 3
  

Question 9

A page fault

• Occurs when a program accesses an available page on memory
• is an error in a specific page
• is a reference to a page belonging to another program
• occurs when a program accesses a page not currently in memory

Question 10

Using a larger block size in a fixed block size file system leads to

• better disk throughput but poorer disk space utilization
• better disk throughput and better disk space utilization
• poorer disk throughput but better disk space utilization
• poorer disk throughput and poorer disk space utilization