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Friday, 13 October 2017

CSE316 : Operating System Concept End Term Exam Question Paper - lpu



Question 1. (a) Give an abstract view of components of a computer system.
(b) Job of Security is to defend a system from external and internal attacks. Comment?
(c) Differentiate between preemptive and non-preemptive scheduling?
(d) What is busy waiting?
(e) What is Difference between Deadlock avoidance and Deadlock prevention?
(f) List the names of attributes which are helpful in identifying files.
(g) What do you mean by Dynamic Linking and Dynamic Loading?
(h) What are the solution of external fragmentation?
(i) What are two limitation of using pipes in IPC?
(j) What do you mean by file descriptors?


Question 2. (a) Explain the methods through which the user interacts with the operating systems?
(b) What do you mean by operating system? Explain the structure of various operating systems.

Question 3. (a) Write a program for listing all environment variables.
(b) Explain Memory Layout of C program with Suitable Examples.

Question 4. (a) Consider a following Page String : 1,2,4,3,2,1,5,6,2,1,2,3,7,6,3,2,1,2,3,6
How many page fault would occur for the LRU Replacement algorithm assuming two, three frames?
Initially all frames are empty.
(b) Compare paging with segmentation with respect to the amount of memory required by the
address translation structures in order to convert virtual addresses to physical addresses.

Question 5. (a) In almost every case many files are stored on the same disk. The main problem is how to
allocate space to these files so that the disk space utilized effectively and files can be access
quickly. Discuss the methods along with its advantage and disadvantages in details.
(b) (i) What is seek time? Why rotation latency is usually not considered in disk scheduling?
(ii) Except FCFS, none of the disk scheduling discipline is truly fair (starvation may occur) explain
why this assertion is true. Also explain why fairness is an important goal in time sharing system.

Question 6. (a) Write a short note on following:
(i) Named Pipes
(ii) Pipes
(iii) popen and pclose
(b) The parent process passes the data or message to child process using the method of IPC.
Explain which method is used for this type of communication along with an example.


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