Previous Year Question Paper

AD/CD/CS/SD-405 (GS) – Operating Systems

June 2024•CSE•SEMESTER-4

June 2024

Max Marks: 70

Duration: 3 Hours

Instructions:

• Attempt any five questions.

• All questions carry equal marks.

Q.1

a)Unit 1

In multiprogramming/time-sharing, several users share system. What are two security problems? Can same security be ensured as dedicated machine?

b)Unit 3

What are the five major activities of an operating system in regards to process management?

Q.2

a)Unit 2

Why do some systems keep track of file type while others don't? Which system is better?

b)Unit 2

For a file system with 512-byte blocks, explain logical-to-physical address mapping for contiguous, linked and indexed allocation.

Q.3

a)Unit 3

What resources are used when a thread is created? How do they differ from process creation?

b)Unit 3

Given a segment table, find physical addresses for logical addresses: 0430, 110, 2500, 3400.

Q.4

a)Unit 4

What is busy waiting? What other kinds of waiting exist? Can busy waiting be avoided?

b)Unit 3

Can a system detect starving processes? Explain how or how to deal with starvation.

Q.5

a)Unit 5

What are the advantages and disadvantages of making the computer network transparent to the user?

b)Unit 5

List three possible types of failures in a distributed system.

Q.6

a)Unit 3

What are the benefits of mapping objects into virtual memory? Explain.

b)Unit 5

What are the benefits of DFS compared to a file system in a centralized system?

Q.7

a)Unit 4

Why Semaphore is important in OS? Explain Binary and counting semaphores with example.

b)Unit 3

What is Overlay? How do dynamic linking and loading perform in memory management?

Q.8

Unit 4/3/1

Write short notes on (any two): a) Synchronization b) Paging c) System Calls.