Why does a program that requires 1 GB of RAM run in two instances on a computer with only 1 GB of RAM?

Question

Operating Systems

Sobsna, a question from an interview and most likely from the field of operating systems

Answer 1

1. Where did you get the idea that the program requires 1 GB of memory? If from the instructions, then perhaps the program at the maximum may require up to 1 GB of memory, and does not require it at startup.
2. Swap.

Answer 2

As I understand it, the question was the following: how is it that a computer allows you to use more memory than it is physically installed in it? If so. then google: virtual memory

Answer 3

Hehe, system requirements are written most often at random :) Look at how much the program really takes in the memory task manager. You can set more columns including how much virtual memory is used.
In short, the main thing is to know what resources and how it really uses. (and you can write anything in the requirements)

Answer 4

Hello,
This is not from the field of operating systems, but from the field of common sense :-)
Because "require for work" is one thing, and "use at work" is another.