2.2.1 Memory

Memory, often referred to as RAM (Random Access Memory), is a type of volatile memory used by the CPU to store data and instructions temporarily during processing. It provides fast access to the data that the CPU needs while executing tasks.

Characteristics of Memory:

1. Volatility:

Memory is volatile, meaning it loses its contents when the power is turned off. This characteristic distinguishes it from storage, which retains data even without power.

2. Speed:

Memory is significantly faster than storage. It allows the CPU to quickly read and write data, facilitating efficient processing and task execution.

3. Capacity:

Memory typically has a smaller capacity compared to storage. While RAM can range from a few gigabytes (GB) to several terabytes (TB) in high-end systems, storage devices can hold much larger amounts of data.

4. Functionality:

Memory is used for active processes and running applications. It temporarily holds data that is currently in use.

Types of Memory:

1. Dynamic RAM (DRAM):

Commonly used as the main system memory, DRAM needs to be refreshed thousands of times per second to retain data.

2. Static RAM (SRAM):

Faster and more expensive than DRAM, SRAM is used for cache memory. It retains data as long as power is supplied and does not need refreshing.

3. Read-Only Memory (ROM):

Non-volatile memory that stores firmware, which is essential for booting the computer. ROM retains its contents even when the power is off.