5 Questions
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)?
The memory management unit (MMU) in the CPU automatically translates virtual addresses to physical addresses.
How can the operating system extend the capabilities of virtual memory?
The operating system can extend the capabilities of virtual memory by utilizing disk storage to provide a virtual address space that exceeds the capacity of physical memory.
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
Test your knowledge on virtual memory management and learn about the techniques used to create an illusion of a large memory in computer systems.
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