Bit2110:Operating Systems Ii Question Paper

Bit2110:Operating Systems Ii

Course:Computer Technology

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

QUESTION ONE 30 MARKS
a. Describe the advantages of distributed systems. (4 Marks) b. Distinguish between migratory and non-migratory algorithms. (3 Marks) c. Distinguish between local and global algorithms. (4 Marks) d. Describe three methods for addressing processes and outline the drawbacks of each. (6 Marks) e. Describe the problems of the RPC model. (4 Marks) f. Describe the following: (6 Marks) i. On-chip memory ii. Ring base multiprocessors iii. Switched multiprocessors g. Discuss the strict consistency model.
QUESTION TWO 20 MARKS
a. Distinguish between stateless and stateful servers. (4 Marks) b. List any four advantages of stateless servers. (4 Marks) c. Describe the following algorithms: (8 Marks) i. Write-through ii. Delayed write iii. Write-on-close iv. Centralized control d. Describe the following cache consistency models: (4 Marks) i. Causal consistency ii. Weak consistency
QUESTION THREE 20 MARKS
a. Discuss the differences between the WAIT-DIE and WOUND –WAIT deadlock prevention algorithms. (4 Marks) b. Discuss the advantages and disadvantages of implementing threads in user space. (6 Marks) c. Distinguish between monolithic kernel and microkernel. (4 Marks) d. Discuss scheduler activations. (6 Marks)

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