What is the difference between overlays and virtual memory

But in case of overlays whole system memory management is done by programmer ,But in case of paging operating system has the responsibility of managing system memory. Have a look at it. Login Register. Please log in or register to add a comment. Please log in or register to answer this question. Next Qn. Related questions 1 vote. The main problem in Fixed partitioning is the size of a process has to be limited by the maximum size of the partition, which means a process can never be span over another.

In order to solve this problem, earlier people have used some solution which is called as Overlays. The concept of overlays is that whenever a process is running it will not use the complete program at the same time, it will use only some part of it.

Then overlays concept says that whatever part you required, you load it and once the part is done, then you just unload it, means just pull it back and get the new part you required and run it. Sometimes it happens that compare to the size of the biggest partition, the size of the program will be even more, then, in that case, you should go with overlays.

Attention reader! So overlay is a technique to run a program that is bigger than the size of the physical memory by keeping only those instructions and data that are needed at any given time. In case of overlays whole system memory management is done by programmer ,But in case of Do you need an answer to a question different from the above? Ask your question!

We want to correct this solution. Tell us more. Was the final answer of the question wrong? Were the solution steps not detailed enough?

Was the language and grammar an issue? Didn't find yours? Q: Difference between overlays in programming and virtual memory? Write your answer Related questions. What is the difference between virtual reality and reality? What is the difference between bitween pagefile and virtual memory? What is the difference between java and android?

What is the difference between a real resource and a virtual resource? What is the difference between virtual and real girl? What is difference between pure virtual function and virtual function? What is the difference between converging and diverging lenses?

What is the difference between the real world and the virtual world? What is a difference between a real image and virtual image? Is there is a difference between e learning and virtual learning? What is the difference between logical address and virtual address? What is the difference between Second Life and Imvu any other virtual worlds like them explain what you can have such as paid memberships and for imvu like access pass? What is the difference between virtual dj pro and virtual dj basic?

What is the deferance between Digital library and virtual library? What is the difference between e-learning and virtual classroom? What is deffernce between virtual and physical memory?