Computer Science MCQS

Lack of paper in the printer: While the OS cannot physically add paper, it can detect the error and notify the user. It can also suspend the print job until the issue is resolved.

Connection failure in the network: The OS can detect network failures, retry connections, and inform the user of the issue. It can also manage network resources and prioritize traffic.

Power failure: The OS can initiate a shutdown process to save data and prevent corruption. It can also handle system recovery upon reboot.

While the OS might not be able to fully resolve all aspects of these errors, it plays a crucial role in managing system behavior and informing the user.

Therefore, option d) all of the mentioned is correct.

CPU scheduling is the basis of multiprogramming operating systems.

This is because multiprogramming involves executing multiple processes concurrently. CPU scheduling determines which process gets the CPU at any given time, ensuring efficient utilization of the CPU and maximizing system throughput.

System calls are the interface between an application and the operating system. They are essentially functions provided by the OS that can be called by programs to request services like file access, memory allocation, process creation, etc. Think of them as the gateway to the OS's core functionalities.

An operating system (OS) is the fundamental software that manages a computer's hardware and software resources. It serves as an intermediary between the user and the computer, providing a user interface and controlling the execution of applications.

Core Functions of an Operating System:

Resource Management:

Manages the CPU, memory, storage, and input/output devices efficiently.

Allocates resources to different processes and applications.

Handles resource sharing and conflict resolution.

Process Management:

Controls the creation, execution, and termination of processes.

Manages the process lifecycle, including states like running, waiting, and ready.

Implements scheduling algorithms to determine which process gets the CPU.

Memory Management:

Allocates and deallocates memory to processes.

Handles memory protection to prevent unauthorized access.

Implements memory swapping and paging techniques.

File Management:

Organizes and stores data on storage devices.

Provides file creation, deletion, reading, and writing operations.

Implements file systems to structure and manage files.

Input/Output (I/O) Handling:

Manages communication between the computer and external devices.

Handles data transfer and device control.

Provides buffering and caching mechanisms for efficient I/O operations.

User Interface:

Provides a way for users to interact with the computer.

Can be command-line, graphical, or touch-based.

Handles user input and displays system information.

In essence, the operating system acts as the conductor of a complex orchestra, ensuring that all hardware and software components work together seamlessly to deliver the desired functionality to the user.

A command interpreter translates user commands into actions for the operating system. It's the bridge between the user and the computer, allowing users to interact with the system directly.

An operating system is the core software that manages a computer's hardware and software resources, acting as an intermediary between users and the machine.