A very common misconception in Operating Systems is that every page fault means the OS must access the disk.
That is not always true.

A page fault simply means that the required page is not usable in the current context.
This can happen for multiple reasons.

In many cases, the page is already present in main memory, but:

A very common misunderstanding in C and C++ is assuming that the volatile keyword makes code thread-safe.
It does not.....

🎯 Why This Topic Matters​

Every computer science student writes code, but very few truly understand what happens after pressing “Run”.

Whether you write C, C++, Python, or Java — the journey from source code to running program involves the compiler, operating system, memory, and CPU working together.

Understanding this gives you: ....