What are states that the page can be in, after causing a page fault?

Unix Interview Questions

(Continued from previous question...)

65. 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”.

(Continued on next question...)

Other Interview Questions

• How are devices represented in UNIX?
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• Brief about the directory representation in UNIX
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• Predict the output of the following program code
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• How can a parent and child process communicate?
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• What are the process states in Unix?
• What Happens when you execute a program?
• What Happens when you execute a command?
• What is a Daemon?
• What is 'ps' command for?
• How would you kill a process?
• What is an advantage of executing a process in background?
• How do you execute one program from within another?
• What is IPC? What are the various schemes available?
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• What is major difference between the Historic Unix and the new BSD release of Unix System V in terms of Memory Management?
• What is the main goal of the Memory Management?
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• What scheme does the Kernel in Unix System V follow while choosing a swap device among the multiple swap devices?
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• What do you mean by u-area (user area) or u-block?
• What are the entities that are swapped out of the main memory while swapping the process out of the main memory?
• What is Fork swap?
• What is Expansion swap?
• How the Swapper works?
• What are the processes that are not bothered by the swapper? Give Reason.
• What are the requirements for a swapper to work?
• What are the criteria for choosing a process for swapping into memory from the swap device?
• What are the criteria for choosing a process for swapping out of the memory to the swap device?
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• What is the window of the working set of a process?
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• What are data structures that are used for Demand Paging?
• What are the bits that support the demand paging?
• How the Kernel handles the fork() system call in traditional Unix and in the System V Unix, while swapping?
• Difference between the fork() and vfork() system call?
• What is BSS(Block Started by Symbol)?
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• What are the phases of swapping a page from the memory?
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• In what way the Fault Handlers and the Interrupt handlers are different?
• What is validity fault?
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