Operating System

Question 1

What does the operating system do?

Answer 1

Manages:

• UI (GUI or CLI)
• Memory management (where data is stored)
• Multitasking
• Peripheral Management

Question 2

What is the user interface?

Answer 2

Allows the user to interact with the hardware and software

Question 3

What does the operating system manage?

Answer 3

• RAM
• ROM
• secondary storage (hard drives)
• Moves data between RAM and secondary storage and vice versa
• Checks free memory location
• Knows exactly what is stored in each memory location
• Checks in advance if there is enough space to load a process

Question 4

What is the order that the tasks are carried out in called?

Answer 4

Scheduling

Question 5

What does a device driver do?

Answer 5

A program that makes sure that a device performs its tasks correctly

Question 6

Which one is faster, the peripherals or the CPU?

Answer 6

CPU

Question 7

What are buffers?

Answer 7

The peripherals are slower than the CPU so if the CPU has to constantly wait for the peripheral, it will slow everything down. A buffer is a section of RAM which holds data temporarily.

Question 8

How do buffers work when printing something out?

Answer 8

• The OS sends the data to the buffer
• This is a fast process since the data is being moved to the RAM
• The OS can do other tasks while the printer takes the data from the buffer