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T-A (15 Mar Q. No. — 1 Answer the following questions. 15x1=15 (| What is the maximum length of the filename in DOS. Gi) | What is the purpose of system calls. Gii) | Define storage hierarchy of an operating system. (iv) | What do you understand by Booting process of an operating system. (v)__| Who provides the interface to access the services of the operating system. (vi) | Give an example of a deadlock involving only a single process. (ii)_| Which page replacement algorithm give minimum page fault rate. (viii) | Differentiate user and kernel threads. (ix) | What is demand paging. (x) _ | Differentiate physical address and logical address. (xi) | What are the advantages of dynamic loading. (xii) | What is solution to the problem of starvation. (xiii) | What are the disk performance parameters. (xiv) | Write any two file system functions. (xv) | Write any two advantages of LINX operating system. RT-B (20 Marks UNIT-I 2 | What are the functions of an operating system. Describe them. 5 UNIT-IT 3 | What is PCB and what is its significance in scheduling. Give its contents. 5 UNIT-IIL 4 Give memory partition of LOOK, 500K, 200K, 300K, AND 600K (in order). How would each of the first fit, best fit and worst fit algorithm place process of 212K, 417K, 112K, and 426K (in order) ? Which algorithm makes the most efficient use of memory. 5 UNIT-IV 5 | Compare and contrast the terms external and operational security in the context of operating systems. 5 PART-C (40 UNIT-I 6:4) | Explain in detail the layered architecture of an operating system. 5 ii) | What services are provided by operating systems. Describe them. 5 
