Maharashi Dayanand University (MDU) 2011-4th Sem B.C.A Computer Application - exam paper

BCA- JAN 2011 4^Th Semester Operating System

 

1(a). Describe Operating System. Expain Operating System Architecture.

 

(b). Explain Portability, Flexibility and Reliability of an Operating System.

 

2.Discuss in detail.

(a). Multiprogramming

 

(b). Multitasking

 

(c) Time Sharing

 

3. Discuss in detail various techniques of Memory Management in Single User Operating System.

 

4. Discuss in detail.

 

(a)    I/O devices

(b)   Device Independent I/O

(c)    File Management Functions.

 

 

5. Discuss the directory structure of an UNIX Operating System. Explain different operations used in Directory structure.

 

6. . Discuss in detail

(a). File Locking

(b). File Protection and Security

(c). Distributed File System

 

7. (a). Describe in detail Deadlock Prevention and Deadlock Avoidance.

 

(b). Explain any eight UNIX commands.

 

8. (a). Describe in detail Critical Code Section and Mutual Exclusion.

 

(b). Describe in detail Bankers Algorithm.