4. What is an operating system? List at least three functions of an operating system.
时间: 2024-05-20 22:14:41 浏览: 15
An operating system (OS) is a software program that manages computer hardware and software resources and provides common services for computer programs. Here are three functions of an operating system:
1. Memory management: The OS manages the allocation and deallocation of memory space to different programs, ensuring that each program gets the required amount of memory to run smoothly.
2. Resource management: The OS manages and allocates system resources such as CPU time, disk space, and network bandwidth to different programs, ensuring that each program gets a fair share of the available resources.
3. Process management: The OS manages the execution of multiple programs or processes simultaneously, scheduling them to run on the CPU and ensuring that they don't interfere with each other. It also provides mechanisms for inter-process communication and synchronization.
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