• Attempt any five questions.
• All questions carry equal marks.
• In case of any doubt or dispute the English version question should be treated as final.
Explain the architecture of the UNIX operating system. Discuss its major system concepts.
Describe buffer cache, buffer header, and the structure of the buffer pool.
Explain INODES and the structure of a regular file in UNIX.
Write short notes on directories, super block, and INODE assignment.
Explain the following system calls : OPEN, READ, WRITE, and CLOSE.
A file has permissions rwxr-xr-- Find its octal equivalent and explain CHMOD
Explain process layout in system memory and process control in UNIX.
Describe process creation and signals in UNIX.
Explain process scheduling and the principles of concurrency.
A semaphore is initialized to 2. If three processes try to enter the critical section, how many can enter at a time? Explain.
Explain access control, auditing, and trusted computing in operating systems.
Discuss different types of malwares such as viruses, worms, Trojans, rootkits, and ransomware.
Explain common vulnerabilities and exposures. What is meant by secure system configuration?
Discuss virtualization techniques for security and security issues in mobile operating systems, especially Android.
Explain Windows operating system architecture and important Windows internals.
Describe sockets and Winsock. Differentiate between stream sockets and datagram sockets.
