Operating Systems (OCR A-Level Computer Science): Flashcards
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Practise the cards
13 cards from this deck
Operating System definition
Operating System definition
Software managing hardware & providing platform for apps & UI
OS role between hardware & user?
OS role between hardware & user?
A bridge
Why OS needed: multi-tasking
Why OS needed: multi-tasking
Manages multiple apps at once, allocates resources efficiently
CPU scheduling algorithms
CPU scheduling algorithms
Round-robin or priority-based scheduling
Memory types managed by OS
Memory types managed by OS
RAM and virtual memory
Device drivers purpose
Device drivers purpose
Specialised software allowing OS to control specific hardware
What are interrupts?
What are interrupts?
Signals to CPU needing immediate attention from hardware/software
OS security authentication methods
OS security authentication methods
Passwords, biometrics
API meaning
API meaning
Application Programming Interface
GUI meaning
GUI meaning
Graphical User Interface
CLI meaning
CLI meaning
Command-Line Interface
OS utility programs examples
OS utility programs examples
Disk cleanup, file backup, antivirus
OS: hardware or software?
OS: hardware or software?
Software (not hardware)