Operating System Interview Questions and Answers [ 2023 ]
Operating systems (OS) play a crucial role in the functioning of computers and other electronic devices. They are the interface between hardware and software, and enable users to interact with the device. In this article, we will discuss some common operating system interview questions and answers.
What is an operating system?
An operating system is a software that manages the hardware and software resources of a computer. It is responsible for controlling the hardware, managing memory and storage, and providing a platform for running applications. Some examples of operating systems are Windows, macOS, Linux, and Android.
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What are the different types of operating systems?
There are four main types of operating systems:
Single-user operating systems: These systems allow only one user to access the computer at a time. Examples include MS-DOS and Windows 3.x.
Multi-user operating systems: These systems allow multiple users to access the computer simultaneously. Examples include Unix and Linux.
Distributed operating systems: These systems consist of multiple computers that are connected together and work as a single system. Examples include Windows NT and Solaris.
Real-time operating systems: These systems are designed to handle time-sensitive tasks and must complete a specific task within a specified time frame. Examples include VxWorks and QNX.
What is multitasking in an operating system?
Multitasking is the ability of an operating system to run multiple tasks concurrently. This allows users to perform multiple tasks at the same time, such as running an application and listening to music. There are two types of multitasking:
Preemptive multitasking: In this type of multitasking, the operating system decides when a task should be stopped and another task should be started.
Cooperative multitasking: In this type of multitasking, each task must give up control to the operating system before another task can be started.
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What is a process in an operating system?
A process is an instance of a program that is being executed by the CPU. Each process has its own memory space and runs independently of other processes. The operating system manages processes by allocating CPU time and memory resources.
What is virtualization in an operating system?
Virtualization is the creation of a virtual version of something, such as an operating system, a server, or a network. It allows a single physical resource, such as a computer or server, to be divided into multiple virtual resources. This can be useful for testing and development, as well as for running multiple operating systems on a single machine.
What is a kernel in an operating system?
The kernel is the central part of an operating system that manages the hardware and software resources of the computer. It is responsible for controlling the CPU, managing memory and storage, and interacting with input/output devices. The kernel is the lowest level of the operating system and has direct access to the hardware.
What is file system in an operating system?
A file system is a way of organizing and storing files on a computer. It specifies how the files are named, where they are stored, and how they can be accessed. Some examples of file systems are NTFS (Windows), HFS+ (macOS), and ext4 (Linux).
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