Memory & Storage

Memory

Memory stores data temporarily while the computer is running

RAM

RAM stores data temporarily while the computer is running

ROM

ROM stores permanent instructions needed to start the computer

Cacbe Memory

Cache memory provides faster access to frequently used data

Main Memory

Main memory holds program and data currently in use

Secondary Storage

Secondary storage stores data permanently for long-term use

Hard Disk Drive (HDD)

HDD uses magnetic storage to save data

Solid State Drive (SSD)

SSD stores data using flash memory and works faster than HDD

Volatile Memory

Volatile memory loses data when power is off

Non-Volatile Memory

Non-volatile memory keeps data even when power is off

Virtual Memory

Virtual memory uses disk space as an extension of RAM

Memory Access Time

Memory access time is the time needed to read or write data

Memory Address

Memory address identifies the location of data in memory

DRAM

DRAM stores data using capacitors and needs regular refreshing

SRAM

SRAM is faster than DRAM and does not need refreshing

Memory Allocation

Memory allocation assigns memory space to programs

Memory Protection

Memory protection prevents programs from accessing unauthorised memory.

Memory Location

Memory location is a specific place where data is stored

Shared Memory

Shared memory allows multiple proccesses to access the same memory space

Flash Memory

Flash memory is non-volatile memory used in storage devices