Sample Questions Best site for GRE, LSAT, SAT, GMAT, TOEFL, CCNA, CCSA and interview sample questions  

Technical Sample Questions : C |  C++ |  Oracle |  Java | Unix |  Operating Systems |  Data Structure

Sample Technical Questions

Unix Sample Questions

Questions on memory management in uinx

  1. What is page fault? Its types?


    Page fault refers to the situation of not having a page in the main memory when any process references it.

    There are two types of page fault :
    Validity fault,
    Protection fault.

  2. In what way the Fault Handlers and the Interrupt handlers are different?


    Fault handlers are also an interrupt handler with an exception that the interrupt handlers cannot sleep. Fault handlers sleep in the context of the process that caused the memory fault. The fault refers to the running process and no arbitrary processes are put to sleep.
  3. What is validity fault?


    If a process referring a page in the main memory whose valid bit is not set, it results in validity fault.

    The valid bit is not set for those pages: that are outside the virtual address space of a process, that are the part of the virtual address space of the process but no physical address is assigned to it.

  4. What does the swapping system do if it identifies the illegal page for swapping?


    If the disk block descriptor does not contain any record of the faulted page, then this causes the attempted memory reference is invalid and the kernel sends a "Segmentation violation" signal to the offending process. This happens when the swapping system identifies any invalid memory reference.
  5. What are states that the page can be in, after causing a page fault?


    On a swap device and not in memory,
    On the free page list in the main memory,
    In an executable file,
    Marked "demand zero",
    Marked "demand fill".
  6. In what way the validity fault handler concludes?


    It sets the valid bit of the page by clearing the modify bit.
    It recalculates the process priority.

« Previous || Next »

Unix Sample Question Number : 1-5 | 6-11 | 12-16 | 17-23 | 24-29 | 30-36 | 37-41 | 42-48 | 49-55 | 56-61 | 62-67 | 68-73
Sample Test Questions
GRE Sample Questions
CAT Sample Questions
GMAT Sample Questions
TOEFL Sample Questions
ACT Sample Questions
SAT Sample Questions
LSAT Sample Questions
PSAT Sample Questions
MCAT Sample Questions
PMP Sample Questions
GED Sample Questions
ECDL Sample Questions
DMV Sample Questions
CCNA Sample Questions
MCSE Sample Questions
Network+ Sample Questions
A+ Sample Questions
Technical Sample Questions
WASL Sample Questions
CISA Sample Questions

Other Sample Questions
Sample Interview Questions
Sample Teacher Interview Questions
Sample Citizenship Questions
Accuplacer Sample Questions
Science Bowl sample Questions
Driving Test Sample Questions
Sample Survey Questions Sample Essay Questions
Sample Behavioral Interview Questions

Copyright © 2004-2013, Best BSQ. All Rights Reserved.