Virtual memory is nothing but the computer's expandable workspace which allows it to use it's disk storage as an additional RAM. It allows programs to address memory from the logical point of view. (In short aisi memory joh physically available nahi hai lekin computer ke disk storage ko as an additional RAM use kiya jaata hai). Virtual Memory allows the system to compensate for physical memory shortages, which helps the larger applications to run on the systems with less Random Access Memory. ( Virtual memory system ko allow karta hai physical memory ko as a RAM use karne ke liye jisse bade bade applications easily system pe run ho jaaye woh bhi less RAM usage ke saath). Virtual memory is a memory management technique used by operating systems to give the appearance of a large, continuous block of memory to applications, even if the physical memory i.e RAM is limited. (Virtual memory ek aisi memory management technique hai joh operating systems use karte hai large and continuous block of memory aur large applications ko run karne ke liye even if joh physical memory yaani RAM limited ho). A virtual memory is what its name indicates- it is an illusion of a memory that is larger than the real memory. (Virtual memory ek illusion hai woh virtual hai real nahi aur woh real memory se badi hoti hai). We refer to the software component of virtual memory as a virtual memory manager. The basis of virtual memory is the noncontiguous memory allocation model. (Virtual memory ka allocation noncontiguous tareeke se hota hai yaani memory randomly kahi bhi allocate hogi aur woh sequence mai nahi hogi). The virtual memory manager removes some components from memory to make room for other components. (Virtual memory manager kuch cheezo ko kuch components ko remove karte hai taaki dusre components ke liye jagah ban sake).
