Conceptual Database Design: Structure & Advantages
Conceptual Design of Databases
Software
It is the database management system, in charge of managing the databases.
Data
It includes the need to store data and metadata, which describe what is stored in the database.
Users
People who manipulate system data. There are three categories:
- End Users: Those who use data from the database for daily work that need not have to do with computers. Normally, they do not use the database directly, but use applications built for them to facilitate handling of the data.
Understanding Internet and Web Services
Internet Services
The Internet offers numerous services, although in practice, we often use only one or two. Different types of Internet services arise depending on how information is accessed.
Key Internet Services
- World Wide Web (WWW): A primary service for accessing information.
- Email: Electronic mail for communication.
- Telnet: Remote connection to other computers.
- File Transfer Protocol (FTP): For transferring files.
- News: News servers for disseminating information.
- Forums and Chats: Enable conversations
Computer Networking Fundamentals and History
Key Networking Concepts: Q&A
Q1. The presentation layer is responsible for translation, compression, and encryption of data.
Q2. The physical layer converts bits into electronic signals for outgoing messages.
Q3. The difference between the maximum and minimum signal heights is called amplitude.
Q4. The difference between the highest and lowest frequencies of the constituent parts of an analog signal is called bandwidth.
Q5. If a system that operates at 1000 baud has four signal levels, then the system
Operating Systems: Features, User Interface, and File Management
Key Features of Operating Systems
1. Functions of Operating Systems:
- Checking the use of physical resources.
- Controlling the process of storing data and running applications.
- Detecting configuration errors.
- Configuring the various computer components.
- Communicating with other computers.
Features of Different Operating Systems:
- Linux:
- Graphical User Interface (GUI).
- Free, open-source, and freely available technology.
- Supports Plug & Play.
- Immune to virus attacks.
- Incorporates several versions.
- Multiuser and
Intelligent Agents, Best-First, and Breadth-First Search
Intelligent Agents
An intelligent agent is an entity capable of perceiving its environment, processing these perceptions, and responding or acting rationally. This means acting correctly and in a way that maximizes an expected result. Agents operate within an environment. There are several environment types:
- Accessible vs. Inaccessible: In an accessible environment, sensors provide all relevant information.
- Deterministic vs. Non-Deterministic: For a given deterministic environment, the next state
3D Graphics Rendering and Rasterization in WebGL
3D images are rasterized—meaning they are turned into pixels (a 2D array of colors) in the frame buffer. Only draw triangles when using WebGL. The main reason is that their vertices lie on the same plane—a flat, two-dimensional surface that extends infinitely far. A pixel is represented by numeric values indicating a color, is identified by X/Y screen coordinates, and is held in a frame buffer. A frame buffer is an array (usually of integers), a piece of memory that contains the pixels, colors,
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