1)(a) Illustrate that, if wait and signal operations are not performed automatically then mutual exclusion is violated?

(b) Describe the concept of transaction atomicity in detail.

2) What is meant by dead lock? Describe dead lock avoidance mechanisms in detail.

3)(a) Describe the following algorithms in detail.

(i) First fit

(ii) best fit

(iii)  worst fit

(b) What is meant by paging? Describe multi level paging.

4)(a) What is meant by thrashing, describe the cause of it? Describe working set model.

(b) Describe any 3 disk scheduling algorithms in detail.

5)(a) Describe the control structures used in LINUX.

(b) Describe in detail about LINUX Proc file system.

6)(a) Describe in detail about LINUX security model.

(b) prepare down the components of LINUX system.