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Saturday, 7 July 2012

Operating Systems (Question bank) (Set-1)

Q1: A variable partition memory system has at some point in time the following hole sizes in the given order :- 20k, 15k, 40k, 60k, 10k, 25k A new process is to be loaded. Which hole size would be filled using best-fit, first-fit and worst-fit respectively?

Q2: Explain the following:
(a)  Batch Processing
(b) Multiprocessing
(c) Multitasking
(d) Real time operating system



Q3: What is round robin scheduling? Explain taking any example. Can it be useful for a single user system? If yes, then explain. If no, then why not?

Q4: Describe the difference between short term, medium term and long term scheduling.

Q5: What is the difference between dedicated and virtual device?


Q6: What is a dead lock? What are the-conditions for a deadlock to occur? How it can be avoided?

Q7: Suppose that the head of moving head-disk with 20 tracks, numbered 0 to 199, has just finished a request at track 125. The queue of the requests is kept in FIFO order: 86,147,91, 177, 94, 150, 102, 175, 130.
What is the total number of head movements needed to satisfy requests for the following disk Scheduling algorithms (i) FCFS (ii) SSTF (iii) Scan

Q8: Discuss the structure of directory and its implementation in detail.

Q9: What are the various free space management techniques? Discuss.

Q10: What is a swap space?

Q11: What is a time sharing system?

Q12: Distinguish between pipe and output redirection.

Q13: Why it is necessary to reallocate a program in memory?

Q14:  What is a process?

Q15: Why protection of file is required?

Q16: Name any two network operating systems.

Q17: What do you understand by thrashing?

Q18: Explain what is FILE ALLOCATION TABLE

Q19: What is Virtual Memory?

Q20: What is an Operating System? Discuss in detail how the operating system can be classified into different categories?

Q21: Distinguish between preemptive and non-preemptive scheduling policies.

Q22: Explain the various Directory structure used in operating system for storing files. Give merits and demerits of all directory structure.

Q23: What would be the effect of the system running too many I/O jobs?

Q24: If a space allocation system could use two different sizes of allocation, e.g., 4K bytes and
512 bytes, how could this be used to minimize fragmentation?

Q25:  Distinguish between disk caching and RAM disk and indicate typical applications of each.


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