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Which is fastest to slowest - CACHE memory - RAM - virtual memory - buffer?
Wiki User
∙ 10y ago
- CACHE memory is a very highspeed RAM coupled with CAM, placed very close to the CPU so that data and instructions that were recently read from RAM will not have to be reread when again needed within some short period of time since last read.
- RAM is randomly accessible memory, it can be fast or slow depending on its implementation and the technology used.
- virtual memory is a rather slow simulation of RAM using OS software, special memory management hardware, and a reserved swap area on a harddisk. Its advantages include: ability to run programs requiring more RAM than the machine physically has, every program can view itself as being the only one using the machine, isolation so that one crashed program will not shut down the entire machine.
- buffer simply refers to any memory device that temporarily hold information generated by one unit before it can be consumed by another unit. Some buffers are very fast, some buffers are very slow, some buffers hold only a small number of bits (maybe even only one bit), some buffers are massive RAM or FIFO memories.
Wiki User
∙ 10y ago
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Explain the Z-Buffer algorithm for removing hidden surfaces?
Depend on the memory availability
What is dirty page in virtual memory management?
it's the page that has been modified in main memory(physical memory), but not yet rewritten in the disk.
Is it conceivable that some operating system processes might have the entire main memory as their address space?
No, it is impossible. The operating system kernel must remain in memory at all times, including the virtual memory manager, thus no single process can physically occupy every address. Indeed, all unused physical memory is allocated to the virtual memory manager. Processes are allocated addresses within the virtual address space but some of those addresses are reserved for system use only. As such, no process can ever use the entire virtual address space let alone the entire physical address space.
Attackers use buffer overflows to?
point to another area in data memory that contains the attacker's malware code
What is a page map table?
In operating systems that use virtual memory, every process is given the impression that it is working with large, contiguous sections of memory. In reality, each process' memory may be dispersed across different areas of physical memory, or may have been paged out to a backup storage (typically the hard disk). When a process requests access to its memory, it is the responsibility of the operating system to map the virtual address provided by the process to the physical address where that memory is stored. The page table is where the operating system stores its mappings of virtual addresses to physical addresses.
What sequences lists the speed of memory from the fastest to the slowest?
registers, level 2 cache , level 1 cache, ram
Should fastest RAM be placed in the slot closest to processor or memory controller?
If you have a mix of RAM devices with different speed capabilities on a motherboard, the memory bus will work on speed of the slowest memory. Then it does not matter which slot you put which memory. - Neeraj Sharma
How does virtual memory optimize performance of your operating system?
It allows hard disk space to be used as RAM It acts as an overflow buffer for the physically available
How do you read virtual memory?
Find a virtual psychic to read your virtual memory.
How does virtual memory work?
virtual memory works just like as temporary memory does
What is deffernce between virtual and physical memory?
The difference between virtual and physical memory is that virtual memory refers to memory space while physical memory are chips like RAM. The memory space for virtual memory is made by operating system when there is insufficient physical memory.
What does the computer use when RAM is full?
Virtual memory, the answer is virtual memory.
When virtual memory is invented?
Virtual memory was invented in the early 1960s
Which segment of a memory or storage in which items are placed while waiting to be?
buffer
Under Windows 2000XP physical memory and virtual memory are both managed by what?
Virtual Memory Manager
What is the difference between bitween pagefile and virtual memory?
pagefile is the virtual memory
What is another name for virtual memory?
Virtual Memory-: Virtual Mem is also known as Swap memory. Swap memory:- Swap mem is the type of memory which allocates by the harddisk in the form of extra RAM for better functioning of the application in the case if you are facing a lack of RAM in order to run that software
