DESCRIBE THE PURPOSE OF AN OPERATING SYSTEM
AN OPERATING SYSTEM HAVE A HUGE NUMBER OF DIFFERENT PURPOSES: - PROVIDES A USER INTERFACE
- ALLOWS MULTI-TASKING
- IT IS PROGRAMMABLE TO DO DIFFERENT THINGS
- ALLOWS BATCH PROCESSING OF DATA
- LOADING AND RUNNING OF SOFTWARE AND APPLICATIONS - USER ACCOUNT MANAGEMENT
- FILE MANAGEMENT
- PROCESSOR/MEMORY MANAGEMENT
- HAS SECURITY FEATURES
- MANAGES PERIPHERALS
SHOW UNDERSTANDING OF THE NEED FOR INTERRUPTS
INTERRUPTS ARE USED BECAUSE THERE ARE DIFFERENT PRIORITIES A COMPUTER WILL HAVE, AND THE COMPUTER NEEDS TO DEAL WITH THEM FIRST. FOR EXAMPLE, IF THE COMPUTER IS RUNNING LOW ON BATTERY, IT HAS TO TELL THE USER AND THEREFORE HAS TO INTERRUPT THE CURRENT PROCESS, AS IF IT WAITS UNTIL THE CURRENT PROCESS IS FINISHED, THE COMPUTER MIGHT HAVE RUN OUT OF BATTERY AND SHUT DOWN WHICH MAY CAUSE LOSS OF DATA.
AN OPERATING SYSTEM HAVE A HUGE NUMBER OF DIFFERENT PURPOSES: - PROVIDES A USER INTERFACE
- ALLOWS MULTI-TASKING
- IT IS PROGRAMMABLE TO DO DIFFERENT THINGS
- ALLOWS BATCH PROCESSING OF DATA
- LOADING AND RUNNING OF SOFTWARE AND APPLICATIONS - USER ACCOUNT MANAGEMENT
- FILE MANAGEMENT
- PROCESSOR/MEMORY MANAGEMENT
- HAS SECURITY FEATURES
- MANAGES PERIPHERALS
SHOW UNDERSTANDING OF THE NEED FOR INTERRUPTS
INTERRUPTS ARE USED BECAUSE THERE ARE DIFFERENT PRIORITIES A COMPUTER WILL HAVE, AND THE COMPUTER NEEDS TO DEAL WITH THEM FIRST. FOR EXAMPLE, IF THE COMPUTER IS RUNNING LOW ON BATTERY, IT HAS TO TELL THE USER AND THEREFORE HAS TO INTERRUPT THE CURRENT PROCESS, AS IF IT WAITS UNTIL THE CURRENT PROCESS IS FINISHED, THE COMPUTER MIGHT HAVE RUN OUT OF BATTERY AND SHUT DOWN WHICH MAY CAUSE LOSS OF DATA.
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