OS Overview Objectives 16-30

1.       The section of code which accesses shared variables is called as __________.

1 Critical section

2 Block

3 Procedure

4 Semaphore

Ans ) 1

2.       Thrashing ________.

1 Reduces page I/O

2 Decreases the degree of multiprogramming

3 Implies excessive page I/O

4 Improve the system performance

Ans ) 3

3.       Routine is not loaded until it is called. All routines are kept on disk in a relocatable load format. The main program is loaded into memory & is executed. This type of loading is called _________

1 Static loading

2 Dynamic loading

3 Dynamic linking

4 Overlays

Ans ) 3

4.       Which of the following is crucial time while accessing data on the disk?

1 Seek time

2 Rotational time

3 Transmission time

4 Waiting time

Ans ) 1

5.       The host repeatedly checks if the controller is busy until it is not. It is in a loop that status register's busy bit becomes clear. This is called _____________ and a mechanism for the hardware controller to notify the CPU that it is ready is called ___________.

1 Interrupt and Polling

2 Polling and Spooling

3 Polling and Interrupt

4 Deadlock and Starvation

Ans ) 3

6.       Unix Operating System is an __________.

1 Time Sharing Operating System

2 Multi-User Operating System

3 Multi-tasking Operating System

4 All the Above

Ans ) 4

7.       Information about a process is maintained in a _________.

1 Stack

2 Translation Lookaside Buffer

3 Process Control Block

4 Program Control Block

Ans ) 3

8.       Distributed OS works on the ________ principle.

1 File Foundation

2 Single system image

3 Multi system image

4 Networking image

Ans ) 2

9.       The problem of fragmentation arises in ________.

1 Static storage allocation

2 Stack allocation storage

3 Stack allocation with dynamic binding

4 Heap allocation

Ans ) 4

10.   Which file system does DOS typically use ?

1 FAT16

2 FAT32

3 NTFS

4 WNFS

Ans ) 1

11.   The program is known as _________ which interacts with the inner part of called kernel.

1 Compiler

2 Device Driver

3 Protocol

4 Shell

Ans ) 4

12.    The time taken by the disk arm to locate the specific address of a sector for getting information is called __________.

1 Rotational Latency

2 Seek Time

3 Search Time

4 Response Time

Ans ) 2

13.   Which file system does Windows 95 typically use ?

1 FAT16

2 FAT32

3 NTFS

4 LMFS

Ans ) 2

14.    Identify the odd thing in the services of operating system.

1 Accounting

2 Protection

3 Error detection and correction

4 Dead lock handling

Ans ) 3

15.    Cryptography technique is used in ________.

1 Polling

2 Job Scheduling

3 Protection

4 File Management

Ans ) 3 

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