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Questions and Answers
What is virtual memory?
Virtual memory is a memory management technique that provides an abstraction of the storage resources available on a computer.
How does the operating system map memory addresses?
The operating system maps memory addresses used by a program, called virtual addresses, into physical addresses in computer memory.
What does main storage appear as to a process or task?
Main storage appears as a contiguous address space or collection of contiguous segments to a process or task.
What is the role of the memory management unit (MMU)?
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How can the operating system extend the capabilities of virtual memory?
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Study Notes
Virtual Memory
- A memory management technique that provides an idealized abstraction of storage resources
- Creates the illusion of a very large main memory for users
Virtual Addresses
- Used by programs to access memory
- Mapped to physical addresses in computer memory by the operating system
Memory Management
- Operating system manages virtual address spaces
- Assigns real memory to virtual memory as needed
Address Translation
- Performed by the memory management unit (MMU) in the CPU
- Automatically translates virtual addresses to physical addresses
Virtual Address Space
- Appears as a contiguous address space or collection of contiguous segments to the process or task
- Can be extended using disk storage to exceed physical memory capacity
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Description
Test your knowledge on virtual memory management and learn about the techniques used to create an illusion of a large memory in computer systems.
