PYQ – OPERATING SYSTEM (2418302) | SEMESTER 3RD (2ND YEAR) | Year 2021

Operating System 2021 OLD PYQ.

Group A

 

Choose the most suitable answer from the following options: -   (1*20=20)

(i) Process synchronization can be done on-

(a) Hardware level

(b) Software level

(c) Both (a) and (b)

(d) None

(ii) Which of the following do not belong to queue for processes ?

(a) Job Queue

(b) PCB Queue

(c) Device Queue

(d) Ready Queue

(iii) In a time-sharing operating system, when the time slot give to a process is completed, the process goes from the running state to the :-

(a) Blocked State

(b) Ready State

(c) Suspended State

(d) Terminated State

(iv) A process control block (PCB) docs not contain which of the following.

(a) Code

(b) Stack

(c) Bootstrap Program

(d) Data

(v) The number of processes completed per unit time is known as-

(a) Output

(b) Throughput

(c) Efficiency

(d) Capacity

(vi) Which of the following is not the state of a process ?

(a) New

(b) Old

(c) Waiting

(d) Running

(vii) The segment of code in which the process may charge common variable, update, table write into file is known as:-

(a) Program

(b) Critical Section

(c) Non-Critical System

(d) Synchronizing

(viii) Conditions must be satisfied to solve the critical section.

(a) Mutual Exclusion

(b) Progress

(c) Bounded wait

(d) All above

(ix) The request and release of resources are-

(a) Command line statements

(b) Interrupts

(c) System calls

(d) Special program

 
(x) For sharable resources, mutual exclusion-

(a) Is required

(b) Ia not required

(c) May be or may not be required

(d) None of above

 
(xi) Virtual memory is normally implemented by-

(a) Demand paging

(b) Buses

(c) Virtualization

(d) All above

(xii) A page fault occurs when:

(a) A page gives inconsistent data

(b) A page cannot be accessed due to its absence from memory

(c) A page is invisible

(d) All of above

(xiii) Which of the following page replacement algorithms suffers from Belayd’s Anomaly ?

(a) Optimum Replacement

(b) LRU

(c) FIFO

(d) Both (a) and (b)

(xiv) A process refers to 5 pages ABCDE in order algorithm is FIFO, the number of page transfers with an empty internal store of 3 frames is :

(a) 8

(b) 10

(c) 9

(d) 7

 
(xv) The circular wait condition can be prevented by.

(a) Defining a linear ordering of resource types

(b) Using thread

(c) Using pipes

(d) Above all

(xvi) Which are of the following is dead lock avoidance algorithm

(a) Banker’s algorithm  

(b) Round-robin algorithm 

(c) Elevator algorithm

(d) Karn’s algorithm

(xvii) To differentiate the many network services a system supports ……….. are used.

(a) Variable  

(b) Sockets

(c) Ports

(d) Services names

(xviii) RPC provides a (an) …………. on the client side, a separate one for each remote procedure.

(a) Stub  

(b) Identifier

(c) Name

(d) Process identifier

(xix) The full from of RMI :

(a) Remote Method Invocation

(b) Remote Method Installation

(c) Remote Memory Installation  

(d) Remote Memory Invocation

(xx) A solution to the problem of external fragmentation is :

(a) Large memory size  

(b) Compaction

(c) Smaller memory size  

(d) None

 

Group:-"B"

➥ Answer all Five Questions: -                         (5*4=20) 

 

2. What do you mean by cooperative process.

OR

Define system program. Explain in brief with example.

 

3. What do you mean by PCB? What are its contents?

OR

Explain direct and indirect communication of message passing

 

4. Explain long term Schedular? 

OR

Explain short term Schedular

 

5. Explain paging in brief.

OR

Explain segmentation in brief.

 

6. Discuss the services of operating system in brief.  

OR

What are the two option of breaking deadlock?

 

Group:- "C"

➥ Answer all Five Questions: -                         (5*6=30) 

 

7. What is process? Draw and state the process state diagram?

OR

Explain concept of virtual memory. Also discuss its advantages.

 

8. What is address binding? Explain the concept of dynamic relocation of address? 

OR

Explain the following:

     (a) File type

     (b) File operation

     (c) File attributes

 

9. What are semaphores? Explain solution of producer-Consumer problem using semaphore?  

OR

Explain three requirement that a solution to critical-section problem must satisfy.

 

10. Discuss the criteria for evaluating the CPU scheduling algorithm? why do need it in detail.

OR

How to provide protection to a file system? Explain detail

11. Explain in detail about the system administration of LINUX system and the requirement for LINUX system administration.  

OR

      Write short note on

      (a) Process management modes of LINUX

      (b) Disk Scheduling mechanism

 

 

 

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