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Thiri 2001 Inglés 11 fichas

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1Purpose of operating systemLinks hardware to software and provide a user interface
2Functions of an Operating systemFiles saving loading etc
Memory Allocation
Security-username,password,
encryption
3OS security methodsEncryption>>strong 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-kind of English
Assembly code-close to 01010 etc
machine code-0101010
Hardware
8types of high level codePython,java
9translators are needed for?to convert programming Code into machine code (010101)
10what is the difference between a translator and a compilerA compiler converts code before it is run
A translator converts it as it is entered
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