Important Question for B.Tech [CSE/IT]

B.Tech [CSE/IT]

Operating Systems

Assignment Questions

24-03-2011

Unit 5

1. What are the services that are provided by the kernel related to I/O? Write about the kernel I/O subsystem in detail.

2. Explain about deadlock prevention methods with examples.

3. What is deadlock? Explain deadlock avoidance?

4. What are the conditions that must satisfy for deadlock occurrence & explain them?

5. Explain the stream mechanism with its structure?

6. Differentiate b/w polling & interrupt initiated I/O?

Unit 6

1. Write short notes on A) sequential file B) indexed file C) indexed sequential file D) direct file.

2. Describe various file allocation methods briefly?

3. A) Discuss the objectives for a file management sys?

B) Illustrate with a neat diagram about the various elements of a file management system?

C) What do you understand by a file directory?

4. Discuss in detail various schemes for defining the logical structure of a directory?

5. Give a detailed description of acyclic graph directories?

Unit 7

1. Explain various disk scheduling algorithms with example?

2. Discuss the reasons why os might require accurate information on how blocks are stored on a disk? How can the os improve the performance of the file system with this knowledge?

3. Describe the physical structure of magnetic disks & magnetic tapes with its merits & demerits?

4. What are the various RAID levels? Explain?

5. Explain the following terms with respect to a magnetic disk. A) transfer rate B) random access time C) head crash

6. Explain about network attached storage device? What are its drawbacks?

Unit 8

1. A) Explain the various password selection strategies? B) Discuss about UNIX password scheme?

2. A) Explain the flaws in one-way encryption of password strategies B) Write a brief note on intrusion detection C) Write about intruders?

3. Write a short notes on A) viruses B) worms C) logic bomb D)trap door

4. What do you mean by protection? What are the goals of protection?

5. Illustrate the concept of access matrix with an example?

6. Which is difficult either the revocation of access list or capability list? Why?

Operating Systems

Important Questions

24-03-2011

1. What are the services that are provided by the kernel related to I/O? Write about the kernel I/O subsystem in detail.

2. What is deadlock? Explain deadlock avoidance?

3. Differentiate b/w polling & interrupt initiated I/O?

4. Explain various disk scheduling algorithms with example?

5. Write short notes on A) sequential file B) indexed file C) indexed sequential file D) direct file.

6. A) Discuss the objectives for a file management sys?

B) Illustrate with a neat diagram about the various elements of a file management system?

C) What do you understand by a file directory?

7. What are the various RAID levels? Explain?

8. Write a short notes on A) viruses B) worms C) logic bomb D)trap door

9. What do you mean by protection? What are the goals of protection?

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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