Introduction Internal & External into OS

The operating system's free memory space becomes fragmented as a result of the processes being loaded and unloaded into memory.

Describe fragmentation?
The operating system's free memory space becomes fragmented as a result of the processes being loaded and unloaded into memory. Due to their small size, memory blocks can't be assigned to processes, hence they remain empty. It's also critical to realise that programmes create free space or a hole in the memory as they are loaded and unloaded from it. The inability to allocate these small blocks to newly incoming processes leads to ineffective memory use.

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