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1Purpose of Operating SystemLinks hardware to software and provides an UI
2Functions of an operating SystemFiles
Memory
Security
3OS Security MethodsEncryption -> storing information in a form readable only by the intended person
Usernames and Passwords -> allows different levels of access for different users
4InterruptsHardware -> Printer out of paper etc Software
5Why do we need interrupts?To stop running processes when an error occurs
6Explain the Interrupt steps of a paper that has run out of paper1. Send interrupt OUT of PAPER to PC
2. OS Notifies User, User fills printer
3. Printer sends signal that it is now ready`
7Code LevelsHigh Level
Assembly code
Machine Code
Hardware
8Types of High Level CodePython, Java
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