Operating System- Fundamental Concept and Architecture

February 28, 2026 • Computer • 13 views

ayush kumar

ayush kumar

I'm Ayush Kumar, a cross-platform Software Developer.

Fundamental Concepts and Architecture of an Operating System.

Operating System- Fundamental Concept and Architecture • 9 pages

Today, we are going to learn about the Operating System, its fundamental concepts, and its architecture. This topic is part of Computer Science academic notes. An operating system acts as a bridge between applications and computer hardware. It manages important components like the CPU, memory, storage, and device drivers, allowing applications such as web browsers, word processors, and database software to function properly.

An Operating System, also known as OS, is system software that manages computer hardware and software resources. It provides an interface between the user and the underlying hardware. The operating system ensures efficient execution of programs and optimal utilization of system resources like CPU, memory, and storage.

The main objectives of an operating system are as follows: First, to make the computer system convenient and easy to use. Second, to manage system resources efficiently. Third, to ensure reliability, security, and good performance. And finally, to support the execution of user programs smoothly and effectively.

The operating system performs several important functions. It manages processes, including the creation, scheduling, and termination of processes. It handles memory management, which involves allocation and deallocation of main memory. It performs file management by organizing, storing, and providing access to data. It manages devices by coordinating input and output devices. And it ensures security management by protecting system resources from unauthorized access.

There are different types of operating systems. A Batch Operating System executes jobs in batches without user interaction. A Time Sharing Operating System allows multiple users to share CPU time efficiently. A Distributed Operating System manages multiple systems and makes them work as a single unit. And a Real-Time Operating System provides immediate responses within strict time constraints.

A process is simply a program that is currently in execution. Each process has its own program counter, stack, and data section. The operating system manages multiple processes simultaneously to ensure smooth and efficient system performance.

A process goes through different states during its life cycle. In the New state, the process is being created. In the Ready state, the process is waiting for CPU allocation. In the Running state, the process is currently executing. In the Waiting state, the process is waiting for an input or output operation. And in the Terminated state, the process has completed its execution.

CPU scheduling determines which process gets access to the CPU. The main goal is to maximize CPU utilization and improve system throughput. Common scheduling algorithms include First Come First Serve, Shortest Job First, and Round Robin.

Memory management controls and coordinates the usage of main memory, also known as RAM. It keeps track of memory allocation and deallocation. It ensures that each process gets sufficient memory space to execute properly and efficiently.

Today, we are going to learn about the Operating System, its fundamental concepts, and its architecture. This topic is part of Computer Science academic notes. An operating system acts as a bridge between applications and computer hardware. It manages important components like the CPU, memory, storage, and device drivers, allowing applications such as web browsers, word processors, and database software to function properly.

An Operating System, also known as OS, is system software that manages computer hardware and software resources. It provides an interface between the user and the underlying hardware. The operating system ensures efficient execution of programs and optimal utilization of system resources like CPU, memory, and storage.

The main objectives of an operating system are as follows: First, to make the computer system convenient and easy to use. Second, to manage system resources efficiently. Third, to ensure reliability, security, and good performance. And finally, to support the execution of user programs smoothly and effectively.

The operating system performs several important functions. It manages processes, including the creation, scheduling, and termination of processes. It handles memory management, which involves allocation and deallocation of main memory. It performs file management by organizing, storing, and providing access to data. It manages devices by coordinating input and output devices. And it ensures security management by protecting system resources from unauthorized access.

There are different types of operating systems. A Batch Operating System executes jobs in batches without user interaction. A Time Sharing Operating System allows multiple users to share CPU time efficiently. A Distributed Operating System manages multiple systems and makes them work as a single unit. And a Real-Time Operating System provides immediate responses within strict time constraints.

A process is simply a program that is currently in execution. Each process has its own program counter, stack, and data section. The operating system manages multiple processes simultaneously to ensure smooth and efficient system performance.

A process goes through different states during its life cycle. In the New state, the process is being created. In the Ready state, the process is waiting for CPU allocation. In the Running state, the process is currently executing. In the Waiting state, the process is waiting for an input or output operation. And in the Terminated state, the process has completed its execution.

CPU scheduling determines which process gets access to the CPU. The main goal is to maximize CPU utilization and improve system throughput. Common scheduling algorithms include First Come First Serve, Shortest Job First, and Round Robin.

Memory management controls and coordinates the usage of main memory, also known as RAM. It keeps track of memory allocation and deallocation. It ensures that each process gets sufficient memory space to execute properly and efficiently.