1.2 Memory Flashcards Preview

AA - COMPUTING - Actual Spec > 1.2 Memory > Flashcards

Flashcards in 1.2 Memory Deck (13)
Loading flashcards...
1
Q

What does ROM do?

A

Holds the 1st instructions for the computer to boot up (BIOS).
You can only read this.

2
Q

What does RAM do?

A

Holds the instructions of the data, OS and applications currently in use.
You can read and write (edit) the RAM.

3
Q

What is the difference between opcode and operand.

A

Opcode stores instructions.

OperanD stores Data.

4
Q

Why is RAM volatile?

A

Everything stored in it is deleted when not connected to a power supply.

5
Q

Which is bigger: RAM or ROM?

A

RAM.

6
Q

Why is RAM faster than a hard drive?

A

It uses solid state chips.

7
Q

What happens if the BIOS is written over?

A

The motherboard won’t work and instructions are lost.

8
Q

What is virtual memory?

A

An area on the hard drive that OS transfers the data that is being least used with the currently used data when the RAM is full.

9
Q

How do you overcome the creation of virtual memory?

A

Add more RAM.

10
Q

What is disk thrashing?

A

When data is frequently swapped between the RAM and virtual memory, causing the programs to slow.

11
Q

Why don’t applications run on the hard disk?

A

It’s too slow so data is transferred to the RAM which is faster.

12
Q

What is flash memory?

A

Non-volatile drive which can read and write.

E.g. solid-state drive, USB, SD cards.

13
Q

Why is flash memory more expensive than a hard disk?

A

Because it’s more portable, durable and reliable due to non-moving parts (less susceptible to damage).