Operating System Concepts: Memory Hierarchy

A large array of words or bytes, each with its own address

A stream of memory addresses, read requests, or address + data and write requests

To sit between main memory and CPU registers

<p>To ensure correct operation and prevent unauthorized access</p> Signup and view all the answers

<p>One CPU clock (or less)</p> Signup and view all the answers

<p>It provides the memory address for the CPU to fetch instructions</p> Signup and view all the answers

<p>The main purpose of a page table is to provide the corresponding frame number (base address of the frame) where that page is stored in the main memory.</p> Signup and view all the answers

<p>The page number is used as an index into a page table which contains the base address of each page in physical memory.</p> Signup and view all the answers

<p>The page offset is combined with the base address to define the physical memory address that is sent to the memory unit.</p> Signup and view all the answers

<p>Physical address 20.</p> Signup and view all the answers

<p>The page table is a data structure used by the operating system to store the mapping between physical and logical addresses.</p> Signup and view all the answers

<p>Page 1 is mapped to frame 6, and the offset is 0, so the physical address is 24 (= (6 x 4) + 0).</p> Signup and view all the answers

<p>4 bytes.</p> Signup and view all the answers

<p>The logical address is translated into a physical address with the help of the page table.</p> Signup and view all the answers

<p>The page table is updated to reflect the new process's page mapping.</p> Signup and view all the answers

<p>8 pages.</p> Signup and view all the answers

<p>The logical address space is 2m and the page size is 2n.</p> Signup and view all the answers

<p>The page table provides the mapping between logical addresses and physical addresses.</p> Signup and view all the answers

<p>To protect user processes from each other and from changing operating-system code and data.</p> Signup and view all the answers

<p>Dynamically.</p> Signup and view all the answers

<p>The degree of multiprogramming is limited by the number of partitions.</p> Signup and view all the answers

<p>The partition is freed and adjacent free partitions are combined.</p> Signup and view all the answers

<p>Information about allocated partitions and free partitions (holes).</p> Signup and view all the answers

<p>How to satisfy a request of size n from a list of free holes.</p> Signup and view all the answers

<p>To indicate if read-only or read-write access is allowed.</p> Signup and view all the answers

<p>It indicates that the associated page is in the process' logical address space.</p> Signup and view all the answers

<p>It allows multiple processes to share the same code, reducing memory usage.</p> Signup and view all the answers

<p>Shared code and data are shared among processes, while private code and data are specific to each process.</p> Signup and view all the answers

<p>A trap to the kernel occurs.</p> Signup and view all the answers

<p>To indicate additional access privileges, such as page execute-only.</p> Signup and view all the answers