Yahoo Web Search

Search results

1. Top results related to operating systems gfg

   • Operating systems vs. database management systems

     Top Answer

     Answered Feb 08, 2019 · 2 votes

     For example, what happens when a user program tries to access a file? That depends on how the user program is accessing the file. fopen/read/write calls are offered by the filesystem managed by the OS.

     Does a system call get invoked that is then handled by the OS to find the correct file and data? If a database is used, the database manages it's own set of data files, and indexes into those data files. The database engine executes IO requests which are handled by the underlying OS. Additionally, the database most possibly will also do caching to reduce file IO.

     Or is the call handled by the DBMS, which can then more efficiently find the data (tuple/record) using a B+ tree for example? And then the DBMS makes a call to the OS to actually get the data? Depending on the database query, the data can be read sequentially, or accessed randomly via an index lookup.

     Is the database only accessed if using a programming language like SQL? If I just write a simple C program that writes a file to disk, is the data really stored in a "database" or just in some block on disk where the information for the file is stored within the inode for that file? It's stored in the filesystem that might used a block based design. A simple C program should use an SDK to connect to a database, and then invoke SQL statements.

     Hope this helps!

     Check all answers on Stack Overflow

     1/5

   • Operating Systems-Input Output Systems Archives

     Check all answers on Geeksforgeeks

     2/5

   • Operating Systems | Input Output Systems | Question 4

     Check all answers on Geeksforgeeks

     3/5

   • Operating Systems | Input Output Systems | Question 5

     Which of the following is major part of time taken when accessing data on the disk? (A) Settle time (B) Rotational latency (C) Seek time (D) Waiting time Answer: (C) Explanation: Seek time is time taken by the head to travel to the track of the disk where the data to be accessed is stored. Quiz of this Question

     Check all answers on Geeksforgeeks

     4/5

   • Operating Systems | Input Output Systems | Question 5

     Put the following disk scheduling policies results in minimum amount of head movement. (A) FCFS (B) Circular SCAN (C) Elevator Answer: (C) Explanation: Circular scanning works just like the elevator to some extent. It begins its scan toward the nearest end and works its way all the way to the end of the system. Once it hits the bottom or top it jumps to the other end and moves in the same direction. Circular SCAN has more head movement than SCAN (elevator) because Circular SCAN has circular jump and it does count as a head movement. SCAN (elevator) is the best choice here. Quiz of this Question

     Whether you're preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, GeeksforGeeks Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we've already empowered, and we're here to do the same for you. Don't miss out - check it out now!

     Looking for a place to share your ideas, learn, and connect? Our Community portal is...

     Check all answers on Geeksforgeeks

     5/5

   Show moreShow less

2. www.geeksforgeeks.org › operating-systemsOperating System Tutorial - GeeksforGeeks

   www.geeksforgeeks.org › operating-systems

   • Cached

   Jan 25, 2024 · An Operating System (OS) is software that manages and handles the hardware and software resources of a computer system. It provides interaction between users of computers and computer hardware. An operating system is responsible for managing and controlling all the activities and sharing of computer resources. An operating system is a low-level ...

3. edu.gcfglobal.org › en › computerbasicsComputer Basics: Understanding Operating Systems - GCFGlobal.org

   edu.gcfglobal.org › en › computerbasics

   • Cached

   An operating system is the most important software that runs on a computer. It manages the computer's memory and processes, as well as all of its software and hardware. It also allows you to communicate with the computer without knowing how to speak the computer's language. Without an operating system, a computer is useless.

4. www.freecodecamp.org › news › what-is-an-osWhat is an OS? Operating System Definition for Beginners

   www.freecodecamp.org › news › what-is-an-os

   • Cached

   Aug 31, 2021 · Types of Operating Systems. Operating Systems is one of the softwares that have been constantly updated over the past years. Different companies continuously working to provide best of their product to keep up with competitors. They Include: Real-time Operating System; The main aim of this system is executing real-time applications.

5. eng.libretexts.org › Courses › Delta_College2.1: Introduction to Operating Systems - Engineering LibreTexts

   eng.libretexts.org › Courses › Delta_College

   • Cached

   An operating system acts as an intermediary between the user of a computer and computer hardware. The purpose of an operating system is to provide an environment in which a user can execute programs in a convenient and efficient manner. An operating system is a software that manages the computer hardware. The hardware must provide appropriate ...

6. People also ask

   What is operating system?

   • Operating System lies in the category of system software. It basically manages all the resources of the computer. An operating system acts as an interface between the software and different parts of the computer or the computer hardware.

   What is an Operating System? - GeeksforGeeks

   www.geeksforgeeks.org/what-is-an-operating-system/

   See all results for this question

   What is an example of operating system?

   • Examples of Operating Systems are Windows, Linux, Mac OS, etc. An Operating System (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs. The operating system is the most important type of system software in a computer system.

   What is an Operating System? - GeeksforGeeks

   www.geeksforgeeks.org/what-is-an-operating-system/

   See all results for this question

   What are the different types of operating systems?

   • Operating Systems: It is the interface between the user and the computer hardware. Types of Operating System (OS): Batch OS – A set of similar jobs are stored in the main memory for execution. A job gets assigned to the CPU, only when the execution of the previous job completes.

   Last Minute Notes – Operating Systems - GeeksforGeeks

   www.geeksforgeeks.org/last-minute-notes-operating-systems/

   See all results for this question

   What does a computer operating system do?

   • Most of the time, there are several different computer programs running at the same time, and they all need to access your computer's central processing unit (CPU), memory, and storage. The operating system coordinates all of this to make sure each program gets what it needs. Operating systems usually come pre-loaded on any computer you buy.

   Computer Basics: Understanding Operating Systems - GCFGlobal.org

   edu.gcfglobal.org/en/computerbasics/understanding-operating-systems/1/

   See all results for this question

7. www.howtogeek.com › 361572 › what-is-an-operating-systemWhat is an Operating System? - How-To Geek

   www.howtogeek.com › 361572 › what-is-an-operating-system

   • Cached

   Aug 8, 2018 · An operating system is the core set of software on a device that keeps everything together. Operating systems communicate with the device's hardware. They handle everything from your keyboard and mice to the Wi-Fi radio, storage devices, and display. In other words, an operating system handles input and output devices.