Flashcards

Untitled

MrKellyOVA English 11 cards

Cards in this deck (11)

1Purpose of operating systemlinks hardware to software and provides an UI
2Functions of an Operating SystemFiles saving loading etc
Memory Allocation
Security - Usernames/password, Encryption
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 -> program has an error needs to close etc
5Why do we need Interrupts ?To stop running processes when an error occurs
6Explain the Interrupt steps of a printer 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
4. OS reseeds Docs Printer restarts printing
7Code levelsHigh Level
Assembly code
Machine code
Hardware
8Types of high Level CodePython, Java
9What are Translators needed for ?to convert Programming Code into Machine code (010101)
10What is the difference between a translatorA Compile converts code before it is run.
A Translator converts it as it is entered
11—