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Child Faults After Write

Question Text​

What causes the page faults registered by the child after the fifth step?

Question Answers​

  • The child writes data to the frames it previously shared with its parent and the copy-on-write mechanism copies and remaps them before writing said data

  • Demand paging propagates the lazy allocation of pages from the parent to the child

  • Creating the child process inherently duplicates some frames

  • They are caused by the loader forking itself when creating the child process

  • They are caused by the bash process forking itself when creating the child process