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Questions and Answers
What is the main purpose of an operating system?
What is the main purpose of an operating system?
- To act as an intermediary between the user and computer hardware (correct)
- To write application software in high-end languages
- To interfere with user activities on the computer system
- To only manage device drivers
Which of the following is a component of the computer system?
Which of the following is a component of the computer system?
- Application software (correct)
- Internet browser
- Computer hardware only
- Printer
What is the kernel in an operating system?
What is the kernel in an operating system?
- A device driver
- A hardware component
- A software containing all elements of the operating system (correct)
- A type of application software
Which of the following is an example of an operating system?
Which of the following is an example of an operating system?
What kind of software is System Software?
What kind of software is System Software?
Which of the following is NOT an objective of the Operating System?
Which of the following is NOT an objective of the Operating System?
What area of the computer architecture includes the RAM, I/O, and CPU?
What area of the computer architecture includes the RAM, I/O, and CPU?
What is the function of the operating system in memory management?
What is the function of the operating system in memory management?
What does the operating system do in the context of processor management?
What does the operating system do in the context of processor management?
What type of system call involves system programs?
What type of system call involves system programs?
Which activity does the operating system NOT handle?
Which activity does the operating system NOT handle?
What is the main function of an I/O controller in device management?
What is the main function of an I/O controller in device management?
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Study Notes
Operating System Purpose
- Manages computer hardware and software resources.
- Provides common services for computer programs.
- Acts as an intermediary between users and hardware.
Computer System Components
- Hardware (CPU, memory, storage, peripherals).
- Software (operating system, applications).
- Firmware (BIOS, embedded systems).
The Kernel
- Core of the operating system.
- Responsible for managing system resources.
- Interacts directly with hardware.
Operating System Examples
- Windows, macOS, Linux, Android, iOS.
System Software Classification
- System software includes the operating system and other programs that manage and control computer hardware and software resources.
Non-Operating System Objective
- Application-specific tasks (e.g., word processing, game playing). Operating systems provide a platform for these, not the tasks themselves.
Computer Architecture Area
- Central Processing Unit (CPU).
- Input/Output (I/O) systems.
- Random Access Memory (RAM). These are part of the system architecture. This is also sometimes referred to as the von Neumann architecture.
Memory Management Role
- Allocates and deallocates memory to processes.
- Prevents processes from interfering with each other's memory.
- Manages virtual memory (swapping between RAM and secondary storage).
Processor Management
- Allocates CPU time to processes.
- Schedules process execution to optimize performance.
- Handles context switching between processes.
System Calls Involving System Programs
- System calls that interact with system programs (e.g., file system calls).
Activities NOT Handled by the OS
- Application-specific tasks (e.g., computations within a spreadsheet program). The OS provides services to run these apps, but doesn't do the app's direct work.
I/O Controller Function
- Manages data transfer between I/O devices and memory.
- Handles device interrupts and error conditions.
- Translates requests into device-specific commands.
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