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12.stickley English 10 cards

Cards in this deck (10)

1Purpose of an operating systemLinks hardware to software and provides an UL
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 user
4InterruptsHardware - printer out of paper etc
Software - program has an error needs to close etc
5Why do we need interruptsTo 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
IN ORDER
8Types of high level codePython
Java
9Translators are needed for ?To convert programming code into machine
10What is the difference between a translatorA compile converts code before it is run
A translator converts it as it is entered