IMPORTANT QUESTIONS

1. what is BUFFERING and SPOOLING.
2.Define operating system and list various types of Operating systems.
3.explain Real time and Distributed operating system.
4.Explain in details the components of operating system.
5. what is system call?explain in brief about different System calls.
6.Explain  Time Sharing and Multi programming Operating systems.
7.explain single ,multi user operating system structure.

Unit--2

1. define process ? explain  Sequential process and process state Diagram.

2.explain about process control block(PCB) with neat diagram  and process creation and termination.

3.Explain about CPU scheduling and Scheduling criteria.

4.Explain about various scheduling algorithms..(FIFO,SJF,Round Robin,Time Sharing,Multilevel ,Multi    feed back).

5.what is deadlock? what are the necessary conditions for deadlock.

6.Explain about deadlock prevention and avoidance.

7.explain about  deadlock recovery.

UNIT -3

1.explain briefly

                  a) Dynamic Binding     b)Dynamic loading    c)Dynamic linking.    d) Overlays.

2.write about Swapping.

3. write in detail about single and multi partition allocation.

4. Write about Paging and segmentation concepts.

5.what is Demand paging.

6. what is page replacement and write about 

                                                                  a) FIFO  b) LRU  c) Optimal .. page Replacement Algorithms.

Explain in detail about Thrashing.

UNIT--4

1.Explain Disk Structure.

2.write about 1) BIT vector  2)LIinked   3)  counting 4) Grouping.

3.write about  a) sequential   b) linked   c)Indexed Allocation Methods.

4.explain with example    

• FCFS
• SST
• SCAN
• CSCAN
• LOOK   

UNIT---5                        

1.what is File management ? list and Ex[lain various file operations.

2.write about  1) sequential 2) Direct  and 3) Simulation of sequential and direct access method.

3.Explain about Directory Structure..

4. write about File protection.    

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