IGCSE- CS :Memory & Data Storage

Midi files

• store actual music or sounds

• consist of commands on how a particular note can be produced

MP3 files

• use lossy file compression format

• use lossless file compression format

MP3 files are often......... smaller than CD music files

• 50%

• 75%

• 90%

• 80%

Text is stored in ASCII format and text files are usually stored in a ....... format

• lossy

• lossless

.............. needs to be constantly refreshed to retain data

• SRAM

• DRAM

• ROM

....... stores BIOS instructions

• RAM

• SRAM

• ROM

• DRAM

...... stores the OS currently in use

• ROM

• RAM

In HDD data is stored in....

• pits and lands

• blocks and groups

• sectors and tracks

• memory and flip flops

... makes use of flip flops

• SRAM

• DRAM

• ROM

• RAM

which device has the slowest access to data

• RAM

• Cache

• Hard Disk

• Magnetic Tape