3RD Common to all SEMESTER 1 JNTU B.TECH ENGINEERING QUESTION PAPER - OPERATING SYSTEMS

Code No:  R05310503                    R05          Set No.   2

III  B.Tech I Semester Supplementary Examinations,June 2010

OPERATING SYSTEMS

Common to IT, E.COMP.E,  E.CONT.E,  EIE, CSE, CSSE

Time: 3 hours                                                                                  Max Marks:  80

Answer any FIVE Questions

All  Questions carry equal marks

? ? ? ? ?

1.   (a)  How can logical address  space be contiguous  if the  physical address  space is not contiguous?  Explain.

(b)  What is the purpose of TLB?

(c)  What  is a paging demon?  What  does it do?

(d)  Compare swapping and overlays.                                                         [4+4+4+4]

2. Write  the short notes on the following

(a)  Race Condition

(b)  Process Interaction                                                                                       [8+8]

3. Explain about  protection  technique  of critical section in LINUX.                       [16]

4.   (a)  Why is the  average search time to find a record in a file less for an indexed sequential  file than  for a sequential  file? Explain.

(b)  What  is the difference between a file and a database?

(c)  What  are typical operations  that may be performed on a directory?  [6+4+6]

5. Define Real-time  operating  systems.  Explain  their  importance  in various applica- tions.                                                                                                                             [16]

6. Draw and explain process state  transition diagram  with two suspended states.

[16]

7.   (a)  Give the classification of intruders. Explain each class.

(b)  Compare User-Oriented  access control with data-oriented access control. [8+8]

8.   (a)  What  is the difference between logical I/O  and device I/O?

(b)  Explain feed back scheduling policy.                                                             [8+8]

? ? ? ? ?

1

Code No:  R05310503                    R05          Set No.   4

III  B.Tech I Semester Supplementary Examinations,June 2010

OPERATING SYSTEMS

Common to IT, E.COMP.E,  E.CONT.E,  EIE, CSE, CSSE

Time: 3 hours                                                                                  Max Marks:  80

Answer any FIVE Questions

All  Questions carry equal marks

? ? ? ? ?

1. Explain about  protection  technique  of critical section in LINUX.                       [16]

2.   (a)  Give the classification of intruders. Explain each class.

(b)  Compare User-Oriented  access control with data-oriented access control. [8+8]

3. Draw and explain process state  transition diagram  with two suspended states.

[16]

4.   (a)  How can logical address  space be contiguous  if the  physical address  space is not contiguous?  Explain.

(b)  What is the purpose of TLB?

(c)  What  is a paging demon?  What  does it do?

(d)  Compare swapping and overlays.                                                         [4+4+4+4]

5. Define Real-time  operating  systems.  Explain  their  importance  in various applica- tions.                                                                                                                             [16]

6.   (a)  What  is the difference between logical I/O  and device I/O?

(b)  Explain feed back scheduling policy.                                                             [8+8]

7.   (a)  Why is the  average search time to find a record in a file less for an indexed sequential  file than  for a sequential  file? Explain.

(b)  What  is the difference between a file and a database?

(c)  What  are typical operations  that may be performed on a directory?  [6+4+6]

8. Write  the short notes on the following

(a)  Race Condition

(b)  Process Interaction                                                                                       [8+8]

? ? ? ? ?

2

Code No:  R05310503                    R05          Set No.   1

III  B.Tech I Semester Supplementary Examinations,June 2010

OPERATING SYSTEMS

Common to IT, E.COMP.E,  E.CONT.E,  EIE, CSE, CSSE

Time: 3 hours                                                                                  Max Marks:  80

Answer any FIVE Questions

All  Questions carry equal marks

? ? ? ? ?

1.   (a)  What  is the difference between logical I/O  and device I/O?

(b)  Explain feed back scheduling policy.                                                             [8+8]

2.   (a)  How can logical address  space be contiguous  if the  physical address  space is not contiguous?  Explain.

(b)  What is the purpose of TLB?

(c)  What  is a paging demon?  What  does it do?

(d)  Compare swapping and overlays.                                                         [4+4+4+4]

3.   (a)  Why is the  average search time to find a record in a file less for an indexed sequential  file than  for a sequential  file? Explain.

(b)  What  is the difference between a file and a database?

(c)  What  are typical operations  that may be performed on a directory?  [6+4+6]

4. Explain about  protection  technique  of critical section in LINUX.                       [16]

5.   (a)  Give the classification of intruders. Explain each class.

(b)  Compare User-Oriented  access control with data-oriented access control. [8+8]

6. Write  the short notes on the following

(a)  Race Condition

(b)  Process Interaction                                                                                       [8+8]

7. Define Real-time  operating  systems.  Explain  their  importance  in various applica- tions.                                                                                                                             [16]

8. Draw and explain process state  transition diagram  with two suspended states. [16]

? ? ? ? ?

3

Code No:  R05310503                    R05          Set No.   3

III  B.Tech I Semester Supplementary Examinations,June 2010

OPERATING SYSTEMS

Common to IT, E.COMP.E,  E.CONT.E,  EIE, CSE, CSSE

Time: 3 hours                                                                                  Max Marks:  80

Answer any FIVE Questions

All  Questions carry equal marks

? ? ? ? ?

1. Explain about  protection  technique  of critical section in LINUX.                       [16]

2. Draw and explain process state  transition diagram  with two suspended states.

[16]

3.   (a)  Why is the  average search time to find a record in a file less for an indexed sequential  file than  for a sequential  file? Explain.

(b)  What is the difference between a file and a database?

(c)  What  are typical operations  that  may be performed on a directory?  [6+4+6]

4. Define Real-time  operating  systems.  Explain  their  importance  in various applica- tions.                                                                                                                             [16]

5.   (a)  How can logical address  space be contiguous  if the  physical address  space is not contiguous?  Explain.

(b)  What  is the purpose of TLB?

(c)  What  is a paging demon?  What  does it do?

(d)  Compare swapping and overlays.                                                         [4+4+4+4]

6.   (a)  What  is the difference between logical I/O  and device I/O?

(b)  Explain feed back scheduling policy.                                                             [8+8]

7. Write  the short notes on the following

(a)  Race Condition

(b)  Process Interaction                                                                                       [8+8]

8.   (a)  Give the classification of intruders. Explain each class.

(b)  Compare User-Oriented  access control with data-oriented access control. [8+8]

? ? ? ? ?

4