Operating System Memory Management
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Questions and Answers

What is one of the primary roles of the operating system?

  • To manage the virtual memory alone
  • To only allocate physical memory
  • To manage the physical resources on behalf of executing processes (correct)
  • To only arbitrate memory access

    • What is the purpose of an address space provided by the operating system?

  • To allocate physical memory to a process
  • To arbitrate memory access between processes
  • To couple the physical memory with the virtual memory
  • To decouple the physical memory from the virtual memory (correct)

    • What is a possible scenario when the virtual memory is larger than the physical memory?

  • All physical memory locations are always present in virtual memory
  • Some virtual memory locations are not present in physical memory (correct)
  • All virtual memory locations are always present in physical memory
  • Some physical memory locations are not present in virtual memory

    • What is a mechanism required by the operating system to manage physical memory?

    <p>Physical memory allocation and tracking mechanisms</p> Signup and view all the answers

    What is the purpose of the operating system replacing contents in physical memory with contents from disk?

    <p>To swap out unused virtual memory locations</p> Signup and view all the answers

    What is required for the operating system to arbitrate memory access?

    <p>Quick interpretation and verification of a process memory access</p> Signup and view all the answers

    What is the primary goal of modern operating systems in terms of memory management?

    <p>To quickly translate virtual addresses into physical addresses and validate them</p> Signup and view all the answers

    What is the fixed-size unit of memory allocation in page-based memory management?

    <p>Page</p> Signup and view all the answers

    What mechanism is used in segmentation to arbitrate accesses to memory?

    <p>Segment registers</p> Signup and view all the answers

    What is the main difference between paging and segmentation?

    <p>Paging uses fixed-size pages, while segmentation uses variable-size segments</p> Signup and view all the answers

    What is the purpose of page tables in page-based memory management?

    <p>To arbitrate accesses to physical memory</p> Signup and view all the answers

    Which memory management mechanism is most commonly used in modern operating systems?

    <p>Paging</p> Signup and view all the answers

    What is the main function of a Memory Management Unit (MMU)?

    <p>To convert virtual addresses to physical addresses</p> Signup and view all the answers

    What type of fault can occur when a program attempts to access memory that hasn't been allocated?

    <p>Illegal access fault</p> Signup and view all the answers

    What is the purpose of the Translation Lookaside Buffer (TLB)?

    <p>To cache the virtual/physical address translations</p> Signup and view all the answers

    What is responsible for generating a fault when an issue occurs during memory access?

    <p>The Memory Management Unit (MMU)</p> Signup and view all the answers

    What type of registers are used in a segmentation system to help with memory translation?

    <p>Registers that point to the base address, the size of the segment and the total numbers of segments</p> Signup and view all the answers

    What performs the actual translation from virtual address to physical address?

    <p>The Hardware</p> Signup and view all the answers

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