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  • Question:Predict the output of the following program code?... Normal
    Answer:main() { fork(); printf("Hello World!"); } Answer: Hello World!Hello World! Explanation:...
  • Question:Explain fork() system call.?... Normal
    Answer:The `fork()' used to create a new process from an existing process. The new process is c...
  • Question:What is a shell?... Normal
    Answer:A shell is an interactive user interface to an operating system services that allows an u...
  • Question:Discuss the mount and unmount system calls?... Normal
    Answer:The privileged mount system call is used to attach a file system to a directory of anothe...
  • Question:How do you create special files like named pipes and device files? ... Normal
    Answer:The system call mknod creates special files in the following sequence. 1. kernel assigns ...
  • Question:Brief about the directory representation in UNIX?... Normal
    Answer:A Unix directory is a file containing a correspondence between filenames and inodes. A di...
  • Question:How are devices represented in UNIX?... Normal
    Answer:All devices are represented by files called special files that are located in/dev directo...
  • Question:At what mode the fault handler executes?... Normal
    Answer:At the Kernel Mode....
  • Question:In what way the validity fault handler concludes?... Normal
    Answer:It sets the valid bit of the page by clearing the modify bit. - It recalculates the proces...
  • Question:What are states that the page can be in, after causing a page fault?... Normal
    Answer:- On a swap device and not in memory, - On the free page list in the main memory, - In an ...
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