Unit 1.2 - Memory

Question 1

Purpose of RAM

Answer 1

Stores
Programs, data, parts of the Operating System
currently in use

Question 2

Purpose of ROM

Answer 2

Stores BIOS
(Basic Input/Output System)

Used to boot up the computer
(Bootstrap Loader)

Question 3

RAM - Features

Answer 3

Random Access Memory

Volatile - Data Lost when power is off.

Contents can change.

Removable /upgrade (GB’s)

Question 4

ROM - Features

Answer 4

Read Only Memory

Non Volatile - Data Not Lost when power is off.

Contents cannot change

Non Removable (MB’s)

Question 5

Virtual Memory

Answer 5

Secondary storage used to act like RAM when RAM is full.

VM slower (Data go back to RAM first)
Disk thrashing Noise (high rate of disk access)
Moving Data uses CPU cycles

Question 6

Flash Memory

Answer 6

Non-volatile storage

Electrically erased and reprogrammed. (EEPROM)

Question 7

Types of - RAM

Answer 7

SRAM - Static

• Faster
• Expensive
• Cache
• Data Stays

DRAM - Dynamic

• Slower
• Cheaper
• RAM Modules
• Data needs to be constantly refreshed
• VRAM uses Video RAM