🧠 What are Pages (in OS/memory)?

A page is a fixed-length block of virtual memory. When discussing threads, processes, and system memory, paging is a memory management scheme that eliminates the need for contiguous memory allocation.

🔹 Key Points:

• Size: Typically 4 KB (can be 2 MB or more in modern systems).
• Virtual Memory: Programs access memory using virtual addresses, which the OS maps to physical memory using pages.
• Page Table: Maintains the mapping between virtual pages and physical frames.
• Swapping: When RAM is full, the OS can move pages to disk (swap space), making room for active data.
• Benefits: Prevents fragmentation and allows efficient use of memory.

*** 📦 Real-world analogy:
Think of memory as a book (RAM) and each page in the book is… a page. Programs don't care which physical page they're using; they just read "Page 5", and the OS finds the right actual page in the book.

If you meant something else by “pages” (e.g., web pages), let me know. But in this HLD/fundamentals context, it's almost certainly memory pages