Hello Friends,this section is specifically dedicated to those users who wants to clear the fundamental of computer science. here we have included Computer Science Engineering Basic Multiple Choice Questions Answers ,they can expect some questions from this section for sure in the respective competitive exams.so practice it well and enjoy with good score you expect.
PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE
1. Shell is the exclusive feature of
- UNIX
- DOS
- System software
- Application software
- A shell is a command-line interface that allows a user to interact with an operating system. It is not an exclusive feature of any particular operating system, but is rather a standard feature of most modern operating systems, including Linux, macOS, and Windows.
- In the context of Linux, a shell is a program that interprets user input and executes commands on behalf of the user. The most commonly used shell in Linux is the Bash shell, but there are many other shells available, including Zsh, Fish, and Tcsh.
2. Operating system is
- Hardware
- Software which manage resources of the system
- Software which performs computation
- None
An operating system (OS) is a software that manages and controls the hardware and software resources of a computer system. It provides an interface between the user and the computer hardware, allowing the user to interact with the computer and run applications.
The operating system performs a wide range of tasks, including:
- Resource management: The operating system manages the computer's hardware resources, such as the CPU, memory, and storage devices, allocating them to running applications and managing their usage.
- Process management: The operating system manages the processes running on the computer, ensuring that they have access to the resources they need and that they do not interfere with each other.
- Memory management: The operating system manages the computer's memory, allocating it to running processes and freeing it up when it is no longer needed.
- File management: The operating system manages the computer's file system, allowing users to create, edit, and delete files and directories.
- Security: The operating system provides a variety of security features, such as user authentication and access control, to protect the computer and its data from unauthorized access.
3. A system call is a method by which a program makes a request to the
- Input Management
- Interrupt processing
- Output Management
- Operating system
operating system for a specific service or resource.
When a program needs to perform a task that requires access to a system resource, such as reading from or writing to a file, it must make a system call to the operating system. The system call provides an interface between the program and the operating system, allowing the program to request the resource and the operating system to provide it.
Examples of system calls include opening and closing files, reading and writing data, creating and deleting processes, and managing memory. The exact set of system calls available depends on the operating system being used.
System calls are an important part of the operating system's role in managing the resources of a computer system. They allow programs to access system resources in a controlled and secure manner, and provide a standardized interface for programs to interact with the operating system.
