What is the meaning of physical memory and virtual memory?

Hi

Physical memory is the amount of random access memory (RAM) in your computer.

Virtual memory is hard disk space reserved to emulate physical memory. Virtual memory is also called swap space...

 

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Mohammed Tanvir

Hi,

Physical memory is the memory of your Hard Disk and Virtual is your RAM.

shridhar

physical memory is the memory which really exists and can be used whereas virtual memory is the memory which actually doesn't exists but seems to be present and seems to be used completely but not present actually.

PHYICAL MEMORY IS NOTHING BUT ITS THE RAM,VIRTUAL MEMORY IS THE ONE WHICH SHOWS THAT  MEMORY IS GRATER THAN RAM.THERE IS A SWAP SPACE CALLED SWAPPER WHRE IT PROCESSES OR SWAPPED IN AND OUT FROM RAM.

USUALLY DURING INITIALISATION WE GIVE SWAP SPACE DOUBLE OF THE RAM

VIRTUAL MEMORY=PHYSICAL RAM+SWAP SPACE

Physical memory is the amount of RAM available in your system.

Virtual memory is the space of hard disk which is reserved as RAM. The locations in ram is mapped with that of the virtual memory. whenever the operating system finds that the amount of space in ram is not sufficient for the program it loads some portion of the program in virtual memory and the currently required portion in ram.

physical memory refers to the address location present in the main memory of the system while virtual address refers to the address generated by the processor and does not hold any true value.

pls dnt fail the candidate by giving wrong answs. Physical memory implies RAM.Virtual memory is the technique by which it appears that all data is in RAM while majority portion resides on the hard disk

hi Mr. sridhar,

    physical memory means the amount of RAM memory present in ur computer.

where as virtual memory means it is not exaclty the hard disc memory but some times for doing multiprogramming and multi-tasking ur processor will use both RAM and hard disk memory i.e.,suppose a code(a process) is with some 100 lines the processor stores tha starting address in the RAM and the remaing thing is there at the secondary memory . which seems to be the processor is excuting no of processes simultaneously but all the instructions of the process are not physically present in the RAM , such memory which is not exactly present in the RAM but used by the processor for multi-programming, multi-tasking etc.. we can call it as "virtual-memory"

 haribabu is right ----------------perfect ANS

Hi,

Physical Memory is nothing ICs physically present in computer system.

They are in different forms ECC/SD Ram/DDR etc.

Every server is having limited support of RAM like 512 MB/1024 MB .....2 GB, 4 GB etc.

Where as virtual memory is virtually created memory by means of using hard disk space.

A complete partition is assign for swap or we can create a swap file.

formula for creating virtually memory is

VM=2xRAM Size

actually Virtual memory is create twice the ram size for little bit performace of multiple jobs handle socket handling (job scheduling) Page In Page Out

Regards

Syed Sadat Ali

Physical memory is the actual real memory used in RAM. Virtual memory as the name suggests is not real. The OS uses virtual memory as a memory management technique in which non-contiguous memory is presented to software as contiguous memory. If the RAM falls short of memory to accommodate more running processes, the OS allocates a portion of your hard drive to act as though it were RAM. That's what is referred to as virtual memory.

Wrong Ans ........bro ............. virtual memory is a feature of operating system that enables a process a memory(RAM) address space that is independent of other processes running, and USE THE SPACE THAT IS LARGER THEN THE ACTUAL AMOUNT OF RAM IS PRESENT.