Introduction

Question 1

What is an Operating System?

Answer 1

A cleaner/simpler/model of the computer that manages resources

Question 2

What is the CPU?

Answer 2

The brain of the computer that fetches, decodes, and executes instructions

Question 3

What is a shell?

Answer 3

Text based interaction with the OS
- Like the terminal

Question 4

What is the GUI?

Answer 4

Graphical User Interface
- uses icons with the OS
- Windows, modern systems

Question 5

Kernal mode?

Answer 5

Supervisor mode
- Complete access to the hardware and can execute any instruction
- Usually deals with I/O

Question 6

User mode?

Answer 6

Subset of the machine’s instructions

Question 7

SATA and Disk Driver?

Answer 7

Handling the SATA disk is very complicated so to make it user friendly we use a disk driver

Question 8

Abstraction?

Answer 8

Make the ugly beautiful

Question 9

Multiplexing - Time

Answer 9

CPU decides who gets to use it to complete its task
- the “queue” or line

Question 10

Multiplexing - Space

Answer 10

CPU decides what resources to allocate to each instruction