Questions and Answers
What is the definition of an operating system?
A program that acts as an intermediary between a user and the computer hardware.
Which of the following is NOT a responsibility of an operating system?
What does the operating system do in relation to resources?
List the basic functions of an operating system.
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An operating system can be considered the 'soul' of a computer.
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The beginning of the directory system is called the ______.
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Match the following OS structures with their descriptions:
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Study Notes
Definition of Operating System
- An operating system (OS) is essential software that allows communication between user and computer hardware.
- Without an OS, computers are rendered useless; it manages resources and orchestrates the usage of hardware for solving tasks.
- Functions of OS include managing memory allocation, input/output distribution, interrupt processing, and job scheduling.
- The OS can be seen from four perspectives: as an intermediary program, resource manager, application coordinator, and communication facilitator.
Main Responsibilities of OS
- Executes basic tasks: keyboard input recognition, output to display, file tracking, and peripheral device control.
- Prevents interference among multiple programs and users running simultaneously.
- Provides a platform that supports the operation of application software.
Basic Functions of OS
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Managing Resources
- Coordinates all computer resources such as input devices, storage, and memory.
- Responsible for file system organization, using a hierarchical structure with a root directory for easy data retrieval.
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Providing a User Interface
- Facilitates user interaction with application programs and hardware via a user interface.
- Most modern OS utilize a graphical user interface (GUI) featuring icons that represent commonly used functions.
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Running Applications
- Loads and executes various applications like word processors and spreadsheets.
- Supports multitasking, allowing multiple applications to run concurrently while managing resource allocation.
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Support for Built-in Utility Programs
- Employs utility programs for system maintenance, error identification, file recovery, and data backup.
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Control of Computer Hardware
- Acts as an intermediary between application programs and the Basic Input Output System (BIOS).
- Ensures that all applications access hardware resources through the OS, either via BIOS or device drivers.
OS Structure
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Monolithic
- Known as "the big mess" implying a lack of structured separation within the system.
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Layered
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Microkernel
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Networked & Distributed
Types of OS Architecture
- Varied architectures cater to different platforms, enhancing flexibility and adaptability across systems.
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Description
Explore the fundamental concepts of Operating Systems in Chapter 1. This quiz covers definitions, functions, types, structures, and architectures of OS, along with their components and interfaces. Dive into the interaction between applications and the OS through graphical representations.
