Memory Flashcards
What is memory
This stores data and programs in a computer system and is divided into two types : Main memory and secondary memory
Give example of main memory
RAM and ROM chips
Give examples of secondary storage
Registers and internal cache
Advantages of main memory
can hold more than one program at a time this makes it quicker to swap between tasks
Advantages of secondary storage
Can hold large amounts of data and programs for the long term but can be accessed relatively slow
What is volatile memory
a type of memory that loses its data once the power to the memory chip is switched off
Give examples of volatile memory
RAM
CPU
Cache
Why is secondary storage always non-volatile
because it needs to be kept long term
What is RAM
RAM is used as main memory it acts as a temporary store for program instructions and data
Why is RAM useful as a temporary store
because any data or instructions in RAM can be accessed in any order
Name the two types of RAM
DRAM and SRAM
How much RAM is there in Bytes 1024 bytes 1024 KB 1024 MB 1024 GB
1 bytes
1 KB
1 MB
1 GB
What does RAM stand for
Random Access memory
What does ROM stand for
Read only memory
What is ROM
ROM mean that it cannot be changed, overwritten or removed it is also non-volatile unlike RAM
What features of ROM make it ideal for what
BIOS and the MAC address
What is virtual memory
When the RAM gets too full the operating system makes temporary sections of secondary storage for data to be stored
what are the advantages of virtual memory
it is accessed directly by by the CPU
what are the disadvantages of virtual memory
The memory is volatile so when PC is turned of data is lost and it is slow as when the CPU needs to be held there is asks the OS to load it into RAM first
