Learn: RAM vs ROM - Comparing Roles and Behaviour

Welcome!You’ve already learned about why computers need primary storage, as well as the specific purposes and characteristics of RAM and ROM. Now, we’ll build on this knowledge to compare RAM and ROM, and understand their roles and behaviours.

What is RAM?RAM (Random Access Memory) is volatile memory used for temporarily storing data and instructions that the CPU is actively using. When the computer is turned off, the data in RAM is lost.RAM is needed because it is fast and allows the computer to work efficiently.

What is ROM?ROM (Read-Only Memory) is non-volatile memory that stores critical instructions needed for starting up the computer, such as the BIOS. The data in ROM cannot be changed or lost when the computer is turned off.ROM is essential for ensuring the computer can boot properly every time.

Key Differences Between RAM and ROMRAM is volatile, temporary, and used during processing, while ROM is non-volatile, permanent, and used for essential start-up instructions.RAM can be written to and read from, whereas ROM is read-only.

Why Computers Need Both RAM and ROMComputers use RAM for temporary storage during processing, which allows them to run applications and perform tasks quickly. They use ROM to store essential start-up instructions that are required for booting up.

Examples of RAM and ROMRAM: When you open an application, its data is temporarily stored in RAM while in use. For example, editing a document in a word processor uses RAM.ROM: The instructions stored in ROM allow the computer to load the BIOS and begin the start-up process every time it is powered on.

Review Time!Great work! You've learned about the roles and behaviours of RAM and ROM. Let's test your understanding with a few final questions.