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Database Systems Overview
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Database Systems Overview

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Questions and Answers

What is the primary purpose of a Database Management System (DBMS)?

  • To enhance graphic design capabilities.
  • To operate hardware devices.
  • To manage and organize data in a structured manner. (correct)
  • To provide gaming functionality.

    • Which of the following is not a primary function of a DBMS?

  • Network Configuration (correct)
  • Data Manipulation
  • Data Security
  • Data Definition

    • What type of database is organized into tables, rows, and columns?

  • Key-value store
  • Document database
  • Relational database (correct)
  • Graph database

    • Which of the following describes NoSQL databases?

    <p>They are designed for unstructured or semi-structured data.</p> Signup and view all the answers

    What is a characteristic feature of cloud databases?

    <p>They provide advantages such as scalability and accessibility.</p> Signup and view all the answers

    Which type of NoSQL database is best for storing data with complex relationships?

    <p>Graph database</p> Signup and view all the answers

    What is the main advantage of in-memory databases?

    <p>They enable faster data access by using RAM.</p> Signup and view all the answers

    Which function of a DBMS ensures only authorized users can access and modify data?

    <p>Data Security</p> Signup and view all the answers

    Which of the following is a primary advantage of relational databases?

    <p>Data integrity</p> Signup and view all the answers

    What do object-oriented databases primarily utilize to represent data?

    <p>Objects and classes</p> Signup and view all the answers

    Which characteristic distinguishes NewSQL databases from traditional relational databases?

    <p>Scalability and flexibility of NoSQL</p> Signup and view all the answers

    What type of data structures do NoSQL databases typically use?

    <p>Documents and key-value pairs</p> Signup and view all the answers

    Which disadvantage is commonly associated with non-relational databases?

    <p>Complex transactions</p> Signup and view all the answers

    In the context of SQL, what is a key benefit of using transactions?

    <p>Maintaining data consistency</p> Signup and view all the answers

    What best describes the main goal of web development?

    <p>Developing internet-based applications</p> Signup and view all the answers

    What major feature differentiates non-relational databases from relational databases?

    <p>Flexibility in data format</p> Signup and view all the answers

    What is a primary benefit of using web APIs in application development?

    <p>Reduces development time and effort.</p> Signup and view all the answers

    Which API is specifically designed to manage device vibrations?

    <p>Web API Vibration</p> Signup and view all the answers

    What functionality does the Web Storage API provide?

    <p>Storing data within the browser on the client side.</p> Signup and view all the answers

    Which web API is utilized to control fullscreen mode?

    <p>Web API Fullscreen</p> Signup and view all the answers

    What is the purpose of the Web API Console?

    <p>To provide an interactive debugging environment.</p> Signup and view all the answers

    Which of the following APIs allows websites to display a video in a floating window?

    <p>Web API Picture-in-Picture</p> Signup and view all the answers

    What does the Web API Battery track?

    <p>Battery status of the device.</p> Signup and view all the answers

    Which web API is NOT specifically mentioned as facilitating a type of user interaction?

    <p>Web API CSS Font Loading</p> Signup and view all the answers

    What does HTML primarily serve in web development?

    <p>It defines the structure of a website.</p> Signup and view all the answers

    Which technology is primarily responsible for styling web pages?

    <p>CSS</p> Signup and view all the answers

    What is a key difference between Apache HTTP Server and Microsoft IIS?

    <p>IIS integrates well with the Windows operating system.</p> Signup and view all the answers

    What role does a web server play in web development?

    <p>It processes user requests and serves files.</p> Signup and view all the answers

    Which statement accurately describes web hosting?

    <p>It provides space for a website on a server.</p> Signup and view all the answers

    What is a significant characteristic of Microsoft Internet Information Services (IIS)?

    <p>It offers integrated customer support.</p> Signup and view all the answers

    What does JavaScript add to web pages?

    <p>Dynamic behavior and interactivity.</p> Signup and view all the answers

    How does a web server respond to user requests?

    <p>By sending back the necessary files via HTTP.</p> Signup and view all the answers

    What is the primary function of the WEB API HTML Drag and Drop feature?

    <p>To facilitate user interaction through dragging and dropping elements.</p> Signup and view all the answers

    What does the WEB API Fetch method return after performing a request?

    <p>A Promise that can be used to retrieve the response.</p> Signup and view all the answers

    Which of the following is NOT an advantage of RESTful web services?

    <p>Strict adherence to a formal specification.</p> Signup and view all the answers

    What architectural style allows for compatibility across different programming languages in web applications?

    <p>REST</p> Signup and view all the answers

    How does RESTful architecture support cloud-based applications?

    <p>By adhering to the REST principles, making it compatible with cloud architectures.</p> Signup and view all the answers

    What does RESTful web services permit in terms of data formats?

    <p>HTML, XML, Plain Text, JSON, and others.</p> Signup and view all the answers

    What makes RESTful web services easier to maintain compared to other web services?

    <p>Their stateless nature and standardized interface.</p> Signup and view all the answers

    Which statement is true regarding the speed of RESTful web services?

    <p>They operate faster because of their flexible nature.</p> Signup and view all the answers

    Study Notes

    Database Systems

    • A database is a collection of interrelated data that helps in the efficient retrieval, insertion, and deletion of data.
    • A Database Management System (DBMS) is a software system designed to organize and manage data in a structured manner.
    • The primary functions of a DBMS include data definition, data manipulation, data security, data integrity, concurrency control, and backup and recovery.

    Database Types

    • Relational Databases (SQL Databases) organize data into tables, where each table has rows and columns. These databases use structured query language (SQL) for defining and manipulating data.
    • NoSQL Databases are designed to handle large volumes of unstructured, semi-structured, or structured data. These databases provide flexible schema designs and offer horizontal scalability.

    NoSQL Database Types

    • Document databases store data in flexible, JSON-like documents.

    • Graph databases optimize for data with complex relationships.

    • Key-value stores are the simplest NoSQL databases, storing data as key-value pairs.

    • Column-family stores store data in columns rather than rows.

    • Cloud Databases are online databases that store and manage data in a cloud computing environment. They offer advantages such as scalability, reliability, and accessibility.

    • In-memory databases store data in RAM, leading to faster data access.

    • Time-series databases are optimized for storing and querying time-stamped data, such as sensor data, IoT data, and financial market data.

    • NewSQL databases combine the scalability and flexibility of NoSQL databases with the ACID compliance and SQL querying capabilities of traditional relational databases.

    • Object-oriented databases organize and store data using object-oriented programming principles. Data is represented as objects, encapsulating both data and the methods or functions operating on that data.

    Relational vs Non-Relational Databases

    Relational Databases

    • Advantages:
      • Data integrity
      • Structured Query Language (SQL)
      • Complex queries and relationships
    • Disadvantages:
      • Scalability
      • Schema rigidity
      • Handling of unstructured data

    Non-Relational Databases

    • Advantages:
      • Scalability
      • Flexibility
      • Performance
    • Disadvantages:
      • Complex transactions
      • Consistency
      • Standardization

    SQL vs NoSQL

    • SQL is a domain-specific language used to query and manage data in relational databases. It allows users to query, insert, delete, and update records using complex logic via transactions, stored functions, and views.
    • NoSQL (Not Only SQL) is a type of database that uses non-relational data structures like documents, graph databases, and key-value stores. NoSQL systems offer flexibility, scalability, and are ideal for handling unstructured data.

    Web Technologies

    • Web Development is the process of creating, building, and maintaining websites. It includes web design, web publishing, web programming, and database management.

    Web Development Types

    • Front End Development focuses on what the user sees and interacts with, including visual design, user experience, and interactivity.
    • Back End Development focuses on server-side logic, database management, security, and user authentication.
    • HTML (HyperText Markup Language) structures the content of web pages and acts as a skeleton.
    • CSS (Cascading Style Sheets) is used to style the visual appearance of web pages.
    • JavaScript is a scripting language that adds dynamic behavior and interactivity to web pages.

    Web Servers and Hosting

    • Web Servers process user requests and serve files to create web pages using HTTP. They store website files and deliver them to clients upon request. Examples include:

      • Apache HTTP Server: The most popular open-source web server.
      • Microsoft Internet Information Services (IIS): A performant web server designed for Windows operating systems.

    • Web Hosting provides the resources and technologies for a website to be accessible online. It involves renting space on a computer to store website files and data.

    Web APIs and RESTful Services

    • Web APIs provide interfaces for web browsers and other applications to interact with specific functionalities and data. They allow web pages to dynamically fetch and display information from other sources.

    Why Use Web APIs?

    • Reduces Efforts: APIs can help simplify development time by offering pre-built functionalities and data.
    • Less Maintenance: Third-party APIs are maintained by external providers, reducing maintenance burdens.
    • Security: APIs can enhance security by providing controlled access to data and functionalities.

    Types of Web APIs

    • Web Storage API: Enables storage of data within the browser on the client side.

    • Web API CSS Font Loading: Handles dynamically changing CSS on a web page.

    • Web API History: Provides access to the browser's history.

    • Web API Popover: Displays messages requiring immediate attention, such as help, modals, toasts, etc.

    • Web API Picture-in-Picture: Allows websites to display a floating video window.

    • Web API Fullscreen: Controls fullscreen mode.

    • Web API Battery: Tracks battery status information.

    • Web API Clipboard: Allows direct access to the user's clipboard.

    • Web API Vibration: Enables web developers to manage device vibrations.

    • Web API UI Events: Handles events occurring in the user interface layer.

    • Web API Console: Provides an interactive environment for developers to debug and inspect web applications.

    • Web API HTML Drag and Drop: Enables users to drag and drop elements like text and images within a web page.

    • Web API Fetch: Performs requests and returns a promise for retrieving response data.

    • RESTful Web Services are an architectural style that utilizes Representational State Transfer principles. They aim for performance, scalability, and modifiability using HTTP as their protocol.

    Advantages of RESTful Web Services

    • Speed: RESTful services are faster than SOAP-based services due to their lightweight nature.
    • Compatible with SOAP: RESTful services can be implemented with SOAP principles.
    • Language and Platform Independency: RESTful services can be written in any programming language and used across different platforms.
    • Supports Various Data Formats: They allow the use of various data formats such as HTML, XML, Plain Text, and JSON.

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    Related Documents

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    Description

    Explore the fundamentals of database systems, including the essential functions of Database Management Systems (DBMS) and the different types of databases like relational and NoSQL. This quiz will help you understand key concepts such as data integrity, manipulation, and the unique features of various database types.

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