0
Operating Systems : Question Paper Dec 2014 - Electronics & Communication (Semester 6) | Visveswaraya Technological University (VTU)

Operating Systems - Dec 2014

Electronics & Communication (Semester 6)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.
1 (a) What is OS? What are the common tasks performed by OS and when they are performed?(7 marks) 1 (b) Explain turn around time in batch processing system.(6 marks) 1 (c) Define distribution system. Give the key concepts and techniques used in distributed O.S.(7 marks) 2 (a) Explain with basic structure used for system generation in configuring and installing supervisor.(7 marks) 2 (b) Explain with a figure the working of a two layered O.S. structure.(6 marks) 2 (c) With a neat diagram, explain the working of a micro kernel based O.S.(7 marks) 3 (a) Define a process. List the different fields of a process control blocks.(6 marks) 3 (b) Explain the four fundamental states of process with state transition diagram.(7 marks) 3 (c) What are the advantages of threads over process? Explain kernel level threads.(7 marks) 4 (a) Explain the working of a buddy system allocator.(6 marks) 4 (b) Give the comparison of contiguous and non-contiguous memory allocation.(6 marks) 4 (c) Explain first fit and best fit technique used to perform a fresh allocation from a free list.(8 marks) 5 (a) Explain what are the functions performed by paging hardware.(6 marks) 5 (b) What are the functions performed by VM handler? Give the data structure of VM handler.(6 marks) 5 (c) Consider the page reference string 5,4,3,2,1,43,5,4,3,2,1,5. How many page faults would occur for the following page replacement policies assuming 3 frames?
(i) FIFO (ii) LRU
(8 marks)
6 (a) What are the facilities provided by the file system and the input-output control system?(6 marks) 6 (b) With a figure explain the working of a linked allocation of disk space.(7 marks) 6 (c) Explain the interface between file system and IOCS.(7 marks) 7 (a) With diagram explain the working of a long, medium and short term scheduling in a time sharing system.(10 marks) 7 (b) For the following given process for scheduling.

Processes P1 P2 P3 P4 P5
Arrival time 0 2 3 4 8
Service time 3 3 5 2 3

Calculate mean turn around time and mean weighted turn around for the (i) FCFS scheduling (ii) Round-Robin scheduling with time slicing (?) for I second.(10 marks) 8 (a) Explain the primary issues in implementing message passing.(6 marks) 8 (b) Explain the working of a blocking and non-blocking delivery protocols.(7 marks) 8 (c) Explain mailboxes. Give the advantages of mailboxes.(7 marks)

0  upvotes

Next up

Read More Questions

If you are looking for answer to specific questions, you can search them here. We'll find the best answer for you.

Search

Study Full Subject

If you are looking for good study material, you can checkout our subjects. Hundreds of important topics are covered in them.

Know More