TNEA 2013
Important Questions in Mobile Communication IT2402 IT 2402 subject for NOV/DEC 2011 ANNA UNIVERSITY EXAMINATIONS FOR III YEAR IT Students
CS2411 - Operating Systems
UNIT I
1. Explain the Types of System Calls in detail
2. Explain how hardware protection can be achieved and discuss in detail the dual mode of operations.
3. Explain in detail any two operating system structures
4. List out the services provided by operating system in detail
5. Describe the differences among short-term, medium-term, and long-term scheduling.
UNIT II
1. Explain briefly any four CPU scheduling algorithms with examples
2. Explain Banker's deadlock-avoidance algorithm with an illustration
3. Explain what semaphores are, their usage, implementation given to avoid busy waiting and binary semaphores
4. Define critical section problem and discuss the three requirements that a solution to the critical section problem must satisfy
UNIT III
1. Discuss the following page replacement algorithms, giving a suitable page reference string (i) LRU (ii) FIFO and (iii) Optimal
2. Explain the most commonly used techniques for structuring the page table
3. Explain the concept of demand paging. How can demand paging be implemented with virtual memory?
4. Explain in detail about memory management in linux
UNIT IV
1. Explain the various directory structure in detail
2. Explain in detail the free space management with neat diagram
3. Explain various file allocation methods in detail.
4. what are the directory implementation techniques available ?Explain in detail
UNIT V
1. Explain in detail various disk scheduling algorithms with suitable example
2. Explain the services provided by a kernel I/O subsystem
3. Write short notes on the following (i) I/O Hardware (ii) RAID structure
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