Operating System

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• What do you mean by Virtual Memory? Write down its advantages?
• What is Process Scheduling, CPU Scheduling, Disk Scheduling? Explain Short, Medium and Long term Scheduler?
• Compare Paging and Segmentation?
• Explain concept of a process with its components ?
• Explain various Disk scheduling algorithms with Illustrations ?
• Explain the following in brief Contiguous and Linked list allocation for implementing file system?
• Discuss advantages and disadvantages of the Buffer cache ?
• Define process and thread. What is PCB ? Explain its various entries with their usefulness ?
• What is an Operating System? Write down its desirable characteristics ?
• Explain different types of OS with examples of each ?
• What is an Operating System? Write down its desirable characteristics ?
• Explain different types of OS with examples of each ?
• Define a deadlock ? Write down the conditions responsible for deadlock? How can we recover from deadlock ?
• What is Binary and Counting semaphores ?
• What do you mean by PCB? Where is it used? What are its contents? Explain.
• What are the various services provided by Operating system ?
• Describe necessary conditions for deadlocks situation to arise.
• What are System call? Explain briefly about various types of system call provided by an Operating System?
• What is File? What are the different File attribute and operations?
• Write a Semaphore solution for dining Philosopher’s problem?
• What are points to be consider in file system design? Explain linked list allocation in detail?
• Write the different state of a process with the help of Process state deagram?
• Explain CPU schedulers in operating system?
• Consider the following page reference string:1,2,3,4,5,3,4,1,2,7,8,7,8,9,7,8,9,5,4,5. How many page faults would occur for the following replacement algorithm, assuming four frames:a) FIFOb) LRU
• Write a Semaphore solution for dining Philosopher’s problem?
• What do you mean by paging in operating system ?
• Explain Network operating system?
• What is Mutex in operating system?
• Write the different state of a process with the help of Process state deagram?

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