What is the role of two different types of memory in computer systems?

In computer systems, two main types of memory are usually used: RAM (Random Access Memory) and persistent memory (such as hard drives or flash memory).

• RAM — fast, volatile memory used for storing data and instructions that the CPU works with at the moment. It provides quick access and high processing speed but loses data when power is off.

• Persistent memory — non-volatile memory where data and programs are stored long-term, even when power is off. It is slower than RAM but ensures data retention.

Thus, RAM is responsible for temporary storage and quick data access during operation, while persistent memory is for long-term data storage.