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Top 10 List of Week 05

1. Memory Compression
   Memory compression is a memory management technique that reduces the size of inactive data in the random access memory (RAM) to free up unused space and allow more programs to run at once.

2. RAM vs. ROM
   One of which that differentiates RAM and ROM is that RAM is a temporary storage while ROM is permanent. Check the link for more info about the differences between RAM and ROM.

3. Paging in Operating System
   Paging is a memory management scheme that eliminates the need for contiguous allocation of physical memory.

4. Multilevel Paging in Operating System
   Multilevel Paging is a paging scheme which consist of two or more levels of page tables in a hierarchical manner.

5. NUMA
   NUMA (non-uniform memory access) is a method of configuring a cluster of microprocessor in a multiprocessing system so that they can share memory locally, improving performance and the ability of the system to be expanded.

6. Virtual Memory in Operating System
   Virtual Memory is a storage allocation scheme in which secondary memory can be addressed as though it were part of main memory.

7. System Programs in Operating System
   System Programming can be defined as act of building Systems Software using System Programming Languages.

8. Page Replacement Algorithms in Operating Systems
   In an operating system that uses paging for memory management, a page replacement algorithm is needed to decide which page needs to be replaced when new page comes in.

9. Page Fault
   A page fault happens when a running program accesses a memory page that is mapped into the virtual address space, but not loaded in physical memory.

10. Levels of Memory in Operating System
    Memory hierarchy of a computer system it handles differences in speed. “Hierarchy” is a great way to say “order of thinks” like top to bottom, fast to slow, most important to least important.