Code No: RR410401

RR

Set No. 2

1. (a) Explain the role of process control block in OS. i. Process Switching vs Context Switching ii. Clock interrupt Vs I/O interrupt. 2. Write short notes on:

(b) Indexed file (c) Indexed sequential file (d) Direct file.

or

(a) Sequential file

ld .

(b) Differentiate the following:

in

IV B.Tech I Semester Supplementary Examinations,June 2010 OPERATING SYSTEMS Electronics And Communication Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????

uW

3. Draw the block diagram of kernel, and explain each part of the same.

[8+8]

[4+4+4+4] [16]

4. Explain the state of the process Queue for the Readers / Writers problem and get the solution to the same by using message -passing. [16] 5. (a) What do you understand by a file directory? (b) Explain briefly the information elements of a file directory. (c) Explain what is tree-structured directory?

[5+5+6]

nt

6. (a) What are the various classes of intruders? (b) Discuss about intrusion techniques.

[8+8]

7. (a) Discuss about various criteria used for short-term scheduling. [8+8]

Aj

(b) Discuss about fair share scheduling method.

8. Consider a memory management system with demand paging. There are three processes P1, P2, P3 which have one page of private memory each. Moreover P1 and P2 are sharing an array A which fits entirely into one memory page. Similarly, P2 and P3 are sharing an array B, which fits into a memory page. (a) Let all the data for the processes be located into physical memory. Draw a possible memory allocation diagram, give the page tables for the three processes.

(b) Assume that process P1 gets swapped out of memory entirely. How are the page tables changing. 1

Code No: RR410401

RR

Set No. 2

(c) Assume that process P1 gets swapped back into memory. Give the page tables in this situation. [5+5+6]

Aj

nt

uW

or

ld .

in

?????

2

Code No: RR410401

RR

Set No. 4

1. (a) Explain the role of process control block in OS. i. Process Switching vs Context Switching ii. Clock interrupt Vs I/O interrupt. 2. (a) What do you understand by a file directory?

ld .

(b) Differentiate the following:

in

IV B.Tech I Semester Supplementary Examinations,June 2010 OPERATING SYSTEMS Electronics And Communication Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????

[8+8]

(b) Explain briefly the information elements of a file directory.

or

(c) Explain what is tree-structured directory?

3. Draw the block diagram of kernel, and explain each part of the same. 4. Write short notes on:

uW

(a) Sequential file

[5+5+6] [16]

(b) Indexed file

(c) Indexed sequential file (d) Direct file.

[4+4+4+4]

nt

5. Consider a memory management system with demand paging. There are three processes P1, P2, P3 which have one page of private memory each. Moreover P1 and P2 are sharing an array A which fits entirely into one memory page. Similarly, P2 and P3 are sharing an array B, which fits into a memory page. (a) Let all the data for the processes be located into physical memory. Draw a possible memory allocation diagram, give the page tables for the three processes.

Aj

(b) Assume that process P1 gets swapped out of memory entirely. How are the page tables changing. (c) Assume that process P1 gets swapped back into memory. Give the page tables in this situation. [5+5+6]

6. (a) Discuss about various criteria used for short-term scheduling. (b) Discuss about fair share scheduling method.

[8+8]

7. (a) What are the various classes of intruders? (b) Discuss about intrusion techniques. 3

[8+8]

Code No: RR410401

RR

Set No. 4

8. Explain the state of the process Queue for the Readers / Writers problem and get the solution to the same by using message -passing. [16]

Aj

nt

uW

or

ld .

in

?????

4

Code No: RR410401

RR

Set No. 1

in

IV B.Tech I Semester Supplementary Examinations,June 2010 OPERATING SYSTEMS Electronics And Communication Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Draw the block diagram of kernel, and explain each part of the same.

(b) Differentiate the following: i. Process Switching vs Context Switching ii. Clock interrupt Vs I/O interrupt. 3. (a) What do you understand by a file directory?

ld .

2. (a) Explain the role of process control block in OS.

[16]

[8+8]

or

(b) Explain briefly the information elements of a file directory. (c) Explain what is tree-structured directory? 4. Write short notes on:

uW

(a) Sequential file

[5+5+6]

(b) Indexed file

(c) Indexed sequential file (d) Direct file.

[4+4+4+4]

nt

5. Consider a memory management system with demand paging. There are three processes P1, P2, P3 which have one page of private memory each. Moreover P1 and P2 are sharing an array A which fits entirely into one memory page. Similarly, P2 and P3 are sharing an array B, which fits into a memory page. (a) Let all the data for the processes be located into physical memory. Draw a possible memory allocation diagram, give the page tables for the three processes.

Aj

(b) Assume that process P1 gets swapped out of memory entirely. How are the page tables changing. (c) Assume that process P1 gets swapped back into memory. Give the page tables in this situation. [5+5+6]

6. Explain the state of the process Queue for the Readers / Writers problem and get the solution to the same by using message -passing. [16] 7. (a) What are the various classes of intruders? (b) Discuss about intrusion techniques.

5

[8+8]

Code No: RR410401

RR

Set No. 1

8. (a) Discuss about various criteria used for short-term scheduling. (b) Discuss about fair share scheduling method.

[8+8]

Aj

nt

uW

or

ld .

in

?????

6

Code No: RR410401

RR

Set No. 3

in

IV B.Tech I Semester Supplementary Examinations,June 2010 OPERATING SYSTEMS Electronics And Communication Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Write short notes on:

ld .

(a) Sequential file (b) Indexed file (c) Indexed sequential file (d) Direct file.

[4+4+4+4] [16]

or

2. Draw the block diagram of kernel, and explain each part of the same.

3. Consider a memory management system with demand paging. There are three processes P1, P2, P3 which have one page of private memory each. Moreover P1 and P2 are sharing an array A which fits entirely into one memory page. Similarly, P2 and P3 are sharing an array B, which fits into a memory page.

uW

(a) Let all the data for the processes be located into physical memory. Draw a possible memory allocation diagram, give the page tables for the three processes. (b) Assume that process P1 gets swapped out of memory entirely. How are the page tables changing. (c) Assume that process P1 gets swapped back into memory. Give the page tables in this situation. [5+5+6]

nt

4. (a) Explain the role of process control block in OS. (b) Differentiate the following:

Aj

i. Process Switching vs Context Switching ii. Clock interrupt Vs I/O interrupt.

[8+8]

5. (a) What are the various classes of intruders? (b) Discuss about intrusion techniques.

[8+8]

6. (a) What do you understand by a file directory? (b) Explain briefly the information elements of a file directory. (c) Explain what is tree-structured directory?

[5+5+6]

7. (a) Discuss about various criteria used for short-term scheduling. (b) Discuss about fair share scheduling method. 7

[8+8]

Code No: RR410401

RR

Set No. 3

8. Explain the state of the process Queue for the Readers / Writers problem and get the solution to the same by using message -passing. [16]

Aj

nt

uW

or

ld .

in

?????

8

RR Set No. 2

RR. Set No. 2. IV B.Tech I Semester Supplementary Examinations,June 2010 ... RR. Set No. 2. (c) Assume that process P1 gets swapped back into memory.
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