Memory Unit - SS2 ICT Past Questions and Answers - page 2

RAM (Random Access Memory) is a volatile memory that stores data and program instructions that the CPU is currently using. It allows for fast read and write operations and is used for active data processing. On the other hand, ROM (Read-Only Memory) is non-volatile and contains permanent instructions and data that are essential for booting up and initializing the computer. ROM's contents are typically pre-programmed by the manufacturer and cannot be modified by the user.

The primary purpose of secondary memory is to provide long-term storage for data and programs that aren't actively being processed by the CPU. It offers larger storage capacities compared to primary memory. Examples of secondary memory storage devices include hard disk drives (HDDs), solid-state drives (SSDs), optical discs (CDs, DVDs), and flash drives. These devices are used for data backups, archiving, and storing multimedia content.

A flash drive is a portable storage device that uses NAND flash memory to store data. It connects to computers through USB ports. Flash drives work by electronically writing and erasing data in memory cells. Their advantages include portability, durability (no moving parts), compatibility with various devices, and fast data transfer speeds. They are commonly used for data sharing, backups, and carrying important files on the go.

Optical storage media like CDs and DVDs have advantages such as high durability, low cost per unit of storage, and compatibility with most devices. CDs are commonly used for storing music, software, and smaller data files. DVDs offer larger storage capacities and are used for storing videos, movies, and software installations. They are also popular for creating backups due to their long shelf life and resistance to physical damage.

RAM plays a crucial role in computer performance by providing quick read and write access to data that the CPU is currently using. The amount of RAM directly affects a computer's multitasking capabilities. With more RAM, a computer can run multiple applications simultaneously without significant slowdowns. It allows for smoother switching between programs and reduces the need to constantly read data from slower storage devices, enhancing overall user experience.