Software Study Guide

An operating system (OS) is essential software that manages computer hardware and software resources, providing common services for computer programs. It acts as an intermediary between the hardware and the user, making complex operations manageable. Key functions include file management, which organises and tracks files and folders; process management, which handles the execution of programs and allocates CPU time; peripheral management, which controls input/output devices; and user management, which deals with user accounts, permissions, and security. Without an OS, computers would not be able to run applications or interact with users effectively.

Robust software is designed to operate reliably and recover gracefully from errors and unexpected inputs. This resilience is paramount for user satisfaction, system stability, and security. Identifying vulnerabilities during development and maintenance helps prevent potential failures and malicious exploitation. Key methods for spotting these weaknesses include audit trails, which log system activities for review, and code reviews, where developers scrutinize code for flaws, adherence to standards, and potential security gaps. These practices contribute significantly to building and maintaining high-quality software.