Operating Systems (OS) — Summer 2018

Answer following in short. (1) Discuss the possible reasons for process migration. (2) Define F-SCAN policy. (3) What is the relation between FIFO and clock page replacement algorithm? (4) List characteristics of Real time Operating system. (5) What delay elements are involved in a disk read or write? (6) What is access time? (7) Define Race Condition.

(1) What is Process control Block? (2) What is thread? Discuss the importance of thread in multiprocessing.

What is process? Explain the process state transition diagram with suspend state.

Define Semaphore, What are the permissible operations with Semaphore and how they are used to achieve the mutual exclusion

Define the term Deadlock. Discuss the necessary and sufficient conditions for a Deadlock to occur. State the general approaches to deal with Deadlock situation

What is mutual exclusion? Define Semaphore, the permissible operations with Semaphore and how they are used to achieve the mutual exclusion

What is segmentation? How it differs with paging? Explain address translation in segmentation with paging.

Define Reader/Writer Problem. What are the conditions generally associated with this problem? How can this problem be solved using Semaphores?

(1) Differentiate between Reusable and consumable resources. (2) Discuss Gang Scheduling and Load Sharing with its advantages and Disadvantages.

What is paging? Explain the following terms :

page (ii) frames (iii) page table Also explain with examples how Logical –to Physical Address Translation1 takes place

Briefly explain Fixed and dynamic partitioning with advantaged and disadvantages. Give names of placement algorithm used for fixed and dynamic partitioning.

What is segmentation? List advantages of segmentation. Explain in brief clock policy

What is Translation Lookaside Buffer? Explain the Paging with the use of TLB. What role the main memory cache plays with the Virtual Memory Management using TLB?

Briefly Define FCFS and Round-Robin processor scheduling.

List the difference between the following :

field and a record (ii) File and a database. Also explain the file management system?

List and Briefly define four techniques for thread scheduling.

Explain RAID and its level 0-6 in detail.