PYQ – OPERATING SYSTEM (2418302) | SEMESTER 3RD (2ND YEAR) | Year 2023

Operating System 2023 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) The number of process completed per unit time is known as

(a) Output

(b) Throughput

(c) Efficiency

(d) Capacity

(iii) The request and release of resources are

(a) Command line statement

(b) Interrupts

(c) System calls

(d) Special program

(iv) Virtual memory is normally implemented by

(a) Demand paging

(b) Buses

(c) Virtualization

(d) All of the above

(v) Which of the following page replacement algorithm suffers from Belady’s Anomaly.

(a) Optimum Replacement

(b) FIFO

(c) LRV

(d) Both (a) and (c)

(vi) The circular wait condition can be prevented by

(a) Defining a linear ordering of resources types

(b) Using thread

(c) Using pipes

(d) Above all

(vii) To differentiate the many network services a Systems Supports ________ are used

(a) Variables

(b) Sockets

(c) Ports

(d)Services names

(viii) The full form of RMI

(a) Remote method invocation

(b) Remote method installation

(c) Remote memory installation

(d) Remote memory invocation

(ix) Physical memory is divided into fixed size blocks called

(a) Frames

(b) Pages

(c) Backing store

(d) Leaf

 
(x) Illegal address are trapped using

(a) Error bit

(b) Protection

(c) Valid - Invalid

(d) Access bit

 
(xi) The main purpose of Bankers Algorithm is for

(a) Deadlock avoidance

(b) Deadlock detection

(c) Deadlock recovery

(d) None of the above

(xii) Which of the following is not an application software

(a) Page maker

(b) Adobe Photoshop

(c) Window XP

(d) Picasso

(xiii) Which loader is used when system starts booting

(a) Boot

(b) Booting

(c) Bootstraps

(d) Bootable

(xiv) Which process can be other process executing in the system ?

(a) Cooperating

(b) Child

(c)  Parent

(d) Init

 
(xv) The main memory accommodations

(a) CPU

(b) User process

(c)  OS

(d) All of the mentioned

(xvi) The OS is responsible for?

(a)  Bad block recovery

(b) Booting from disk

(c)  Disk initialization

(d) All of the mentioned

(xvii) Hard real time OS has _________jitter than soft real time OS

(a) Equal

(b) More

(c) Less

(d) None

(xviii) Foe real time OS interrupt latency should be

(a) Zero

(b) Minimal

(c)  Maximum

(d) Dependent on the scheduling

(xix) In UNLX which system call creates the new process?

(a) Create

(b) Fork

(c) New

(d) None

(xx) Which of the following are CPU scheduling algorithm?

(a) Priority scheduling  

(b) Round Robin

(c) Shortest Job fist  

(d) All of the above

 

Group:-"B"

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

 

2. Explain process scheduling with the help of example.

OR

What do you mean by cooperative process?

 

3. Explain concept paging. What do you mean by thrashing?

OR

What do you mean by PCB? What are is contents?

 

4. Explain synchronization in detail. 

OR

Explain long term scheduler?

 

5. How security and protection are achieved in OS? Explain Worm and Trojan horse.

OR

Explain paging in brief.

 

6. Discuss Virtual memory in detail. 

OR

Discuss the services of operating system in brief.

 

Group:- "C"

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

 

7. Explain different sates in process life cycle with Suitable diagram.

OR

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

 

8. Explain semaphore. List out different operations on Semaphore. 

OR

What is address binding? Explain the concept of dynamics relocation of address.

 

9. Explain Message passing and its different methods.  

OR

Explain producer-consumer problem using Semaphore.

 

10. Explain Thrashing. Explain differences between paging and segmentation.  

OR

Describe necessary conditions for a deadlock situation to arise.

 

11. Discuss SJF and Round Robin with the help of examples. 

OR

Discus FCFS and LRU with the help of examples.

 

 

 

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