Real and Virtual Memory in Operating Systems
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Questions and Answers

What are the two basic techniques virtual memory is based on?

  • Segmentation and partitioning
  • Swapping and paging
  • Segmentation and swapping
  • Paging and partitioning (correct)

    • Which partitioning methods are available for managing memory?

  • Fixed Partitioning and Dynamic Partitioning (correct)
  • Concurrent Partitioning and Sequential Partitioning
  • Hard Partitioning and Soft Partitioning
  • Static Partitioning and Variable Partitioning

    • In fixed equal-size partitions, what is the major issue programmers face?

  • Issues related to dynamic partitioning
  • Difficulty in swapping processes
  • Inefficient use of main memory
  • Programs not fitting in a partition (correct)

    • What is the consequence of inefficient main memory use in fixed partitions?

    <p>Memory fragmentation</p> Signup and view all the answers

    When all partitions are full in equal-size partitioning, what determines which process will be swapped out?

    <p>Size of the process</p> Signup and view all the answers

    What technique must programmers use to address the issue of programs not fitting in a partition?

    <p>Overlay design</p> Signup and view all the answers

    What is the purpose of virtual memory in an operating system?

    <p>To relieve the user of tight constraints of main memory</p> Signup and view all the answers

    What is thrashing in the context of memory management?

    <p>A condition in which excessive paging operations are taking place</p> Signup and view all the answers

    Which of the following best describes paging in memory management?

    <p>Dividing memory into fixed-size blocks called pages</p> Signup and view all the answers

    What is the role of the operating system in paging?

    <p>To automatically load pieces of a process into main memory as required</p> Signup and view all the answers

    What is the main memory also known as?

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

    Which of the following is a disadvantage of paging?

    <p>Increased disk usage</p> Signup and view all the answers

    What is the principle of locality in virtual memory?

    <p>Program and data references within a process tend to cluster</p> Signup and view all the answers

    What are the two ingredients needed for virtual memory to be practical and effective?

    <p>Hardware support and operating system management</p> Signup and view all the answers

    Which page replacement algorithm aims to minimize the number of page faults?

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

    What is the importance of address translation in paging?

    <p>It allows logical addresses to be mapped to physical addresses</p> Signup and view all the answers

    Which memory partitioning technique allows for efficient memory usage?

    <p>Buddy system</p> Signup and view all the answers

    What is the role of the operating system in virtual memory?

    <p>To manage the movement of pages and/or segments between secondary memory and main memory</p> Signup and view all the answers

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