What OS ensuring enough is allocated to each application?

An operating system (OS) ensures that enough resources are allocated to each application through a combination of memory management and process scheduling. Memory management allocates RAM to applications, ensuring they have the necessary space to run efficiently, while process scheduling prioritizes CPU time among competing applications. This coordinated resource allocation helps maintain system stability and performance, preventing any single application from monopolizing resources. Overall, the OS balances and optimizes resource usage to provide a smooth user experience.