What are the main functions of an operating system?

The main functions of an operating system encompass a broad array of responsibilities essential for managing computer resources and ensuring that applications can effectively operate. The correct answer includes process management, memory management, file system management, device management, and security management.

Process management involves overseeing the execution of processes, which includes scheduling, creation, and termination, ensuring efficient CPU usage. Memory management handles the allocation and deallocation of memory space as needed by processes, maintaining the integrity and performance of the system.

File system management is crucial as it organizes and maintains data storage, allowing users and applications to access files effectively. Device management is responsible for coordinating and controlling hardware components, making sure that all devices communicate properly with the system and each application can utilize them without conflicts.

Security management, another critical function, protects data and system integrity from unauthorized access and various security threats, ensuring that users can trust the operating system with their information.

Together, these functions form the core capabilities that an operating system must provide to support both user needs and application requirements. Other options, while they mention some aspects of operating systems, do not capture the comprehensive range of functionalities that make an operating system effective and functional.