JNTU B.Tech II OPERATING SYSTEMS Previous Question Paper (February - 2024 - R16)

An operating system is a system software that acts as an intermediary between the computer hardware and the user. It manages computer hardware resources, provides common services for computer programs, and controls the execution of applications.

Operating systems provide a set of essential services to facilitate the efficient execution of programs and improve user convenience:

• Program Execution: The system loads programs into memory, handles execution, and manages process termination.
• I/O Operations: It provides a uniform interface to manage various input and output devices, hiding the complexity of hardware-specific drivers from the user.
• File System Manipulation: It manages the creation, deletion, reading, and writing of files and directories, ensuring proper access control and organization.
• Communication: It enables data exchange between processes, either on the same computer or across a network, through mechanisms like shared memory or message passing.
• Error Detection: The OS constantly monitors the system to detect and respond to hardware or software errors, such as memory faults or device failures, to ensure system stability.
• Resource Allocation: It manages CPU scheduling, memory allocation, and peripheral access to ensure fair and efficient resource distribution among multiple users or tasks.