Averias
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Este documento describe diferentes tipos de averías que pueden ocurrir en un sistema informático, incluyendo averías de hardware y software. También discute herramientas para detectar averías, como destornilladores, pinzas y tarjetas de diagnóstico POST. Además, enfatiza la importancia de seguir un protocolo para detectar averías de manera organizada.
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- Advantages of PHP include being open source, supporting many databases, and being platform independent.
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Applet
An applet is a Java program that runs within a web browser. It extends the Applet class and does not define a main method. Applets are embedded in HTML pages and download to the user's machine when the page loads. The applet lifecycle includes initialization, starting, painting, stopping, and destruction. Parameters can be passed to applets from the HTML and retrieved using getParameter(). JApplet allows using Swing components in applets.
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8. MESSAGE PASSING
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The motherboard is the main circuit board in a computer that connects the central processing unit and memory to other components like storage drives, expansion cards, and ports. It contains connectors for components like the CPU, memory, graphics cards, and hard drives. Key parts of the motherboard include slots for RAM, the chipset, PCI and AGP slots for expansion cards, and connectors for components like displays, USB ports, and sound cards.
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- Advantages of PHP include being open source, supporting many databases, and being platform independent.
- PHP can be used to build dynamic web applications with MySQL, handle dynamic content and sessions, and encrypt data.
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1. OBJECT
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5. INHERITANCE
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The document summarizes the boot process of an operating system. It begins with the BIOS executing code from the ROM chip and loading the master boot record (MBR) from the hard disk. The MBR then loads the volume boot record (VBR) from the active partition, which loads the second stage boot loader like NTLDR or GRUB. This boot loader then loads and executes the kernel, which initializes the filesystem and launches core processes.
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The motherboard is the main circuit board in a computer that connects the central processing unit and memory to other components like storage drives, expansion cards, and ports. It contains connectors for components like the CPU, memory, graphics cards, and hard drives. Key parts of the motherboard include slots for RAM, the chipset, PCI and AGP slots for expansion cards, and connectors for components like displays, USB ports, and sound cards.
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06. Motherboard Form Factors (Computer)
A computer form factor specifies the physical dimensions and layout of a motherboard. Form factors ensure compatibility between hardware components. Common motherboard form factors include ATX, microATX, Mini-ITX, and BTX. The motherboard form factor dictates the overall size of the computer case. Larger form factors like ATX are generally used for desktop computers, while smaller form factors like Mini-ITX are used for small form factor builds and embedded systems. Standard form factors help to ensure interchangeability of parts across vendors.
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- Files represent named collections of related information stored on secondary storage.
- File attributes include name, identifier, type, location, size, protection, and time/date information.
- Basic file operations are creating, writing, reading, repositioning, deleting, and truncating files.
- File types include ordinary files, directory files, and special files which represent devices.
- File structure and access methods like sequential, direct, and indexed access determine how information is organized and retrieved from files.
Computer Hardware
This document discusses different types of computer hardware. It describes internal hardware components like the CPU, motherboard, RAM, and ROM. It also discusses input hardware like keyboards and mice, output hardware like monitors and printers, connecting hardware such as modems and LAN cards, and storage hardware including hard disks, floppy disks, and CD-ROMs. Each type of hardware is defined and examples are provided.
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The document discusses various aspects of file systems and storage management in operating systems. It covers topics like file attributes, operations, structures, access methods, directory structures, file sharing, consistency semantics, and protection. File attributes include the file name, size, type and protection attributes. Common file operations are creating, reading, writing and deleting files. Files can have sequential, direct or indexed access methods. Directory structures can be single-level, two-level, tree-structured or graph-based. File sharing requires consistency models like Unix, session or immutable semantics. Protection controls access via access matrices, access control lists or capability lists.
What is-dos-operating-system
What is Dos Operating System :: MS-Dos Stands for Microsoft Disk Operating System & It is developed by Microsoft Corporation.Dos Operating system was developed in 1981 and its first version was named as Dos 1.00.In Dos work are performed by managing disk And disk files. It Provides a interface between computer hardware and Software programs.
Dos is a 16 bit operating system that means it can save and process 16 bit of data at single time. It is a single user and single tasking Operating system. It is NON-GUI(Graphical User Interface) It Works on CUI(Character User Interface)environment.
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It’s hard to imagine a modern developer workflow without a sufficiently advanced build system: Make, Gradle, Maven, Rake, and many others. In this talk, we’ll discuss the evolution of build systems that leads to distributed build systems, like Google's BuildRabbit. Then, we’ll dive into how we can build a scalable system that is fast and resilient, with examples from Google. We’ll conclude with the discussion of general challenges of migrating systems from one architecture to another.
Introduction to Operating Systems
The document discusses the core components of an operating system including the hardware, kernel, shell, user applications, and describes the functions of the process manager, memory manager, network manager, device manager, and file manager. It also provides information about various operating systems such as UNIX, Windows, MacOS, Linux, Android and iOS.
Operating Systems Basics
The document discusses operating systems and Windows. It defines an operating system as the most important program that runs a computer and manages other programs. It describes operating system functions like recognizing input/output, tracking files, and controlling devices. It outlines four main types of operating systems and provides examples like Windows and MacOS. It explains how operating systems provide platforms for applications and manage memory, hardware, and resources. It provides details on the boot process, graphical user interfaces, desktop components like the taskbar and windows, and basic window features.
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Java applets
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Operating system notes pdf
Definition of Computer
Classification of Computer
Applications of Computer
Block Diagram and Working of Computer System
Different Peripheral Devices
Main Storage and Auxiliary Storage Devices
Computer Hardware and Software
Database Basics Theory
Databases are used to store and organize data for fast retrieval. They have several objectives like speedy retrieval, ordering, and conditional grouping of data. Database management systems (DBMS) help manage databases by defining entities, storage architecture, security, backups and more. Relational database management systems (RDBMS) are most common today and follow Codd's rules. Databases can be classified by usage (operational, data warehouse, analytical), processing type (single, distributed), storage type (flat file, indexed, trees), and content scope (legacy, hypermedia). Database contents include tables with rows and columns to store entity attributes and records. Tables have field/column definitions specifying name, data type, size and other properties
Booting Process OS
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Operating Systems - Processor Management
The document discusses how operating systems use processes and scheduling to allow multiple programs to run simultaneously. It explains that a process is the running instance of a program and contains the program counter, registers, memory allocation, and other state information. The operating system uses process scheduling and a process control block (PCB) for each process to track status, allocate CPU time, and handle interrupts and blocking for I/O. It outlines common scheduling algorithms like first-come first-served, shortest job next, priority, and round robin.
Java reflection
A reflection-oriented program component can monitor the execution of an enclosure of code and can modify itself according to a desired goal related to that enclosure.
Reflection is one of those things like multi-threading where everyone with experience of it says “Don’t use it unless you absolutely have to”.
ROS2 on VxWorks - one project on Wind River Labs
My talk "ROS2 on VxWorks. one Wind River Labs project" at ROS Industrial conference 2019 hits pain points of the ROS Industrial community.
Developer journey from the desktop ROS2 development under Ubuntu to the ROS2 embedded software development is the rocky one.
Software engineers face difficulties to migrate their ROS2 code from native to the cross-compile environment and tune system for the performance, real-time, security and safety.
Application developers don't want to deal with the complexity of the embedded system anymore.
A lack of embedded software developers and usability difficulties make the productivity crisis in the embedded industry very obvious.
Let us stop scaring people with bits, bytes, interrupts, and help them to optimize systems.
Wind River has created a platform for innovation called Wind River Labs and provides VxWorks SDK for the download.
ROS2 on VxWorks is a port of popular Robotics framework to the RTOS and based on the VxWorks SDK. It provides a possibility for the developers to easily switch between Ubuntu and VxWorks development environments.
We plan to make in 2020 the VxWorks and Wind River Linux officially supported OSes by the ROS community. Innovate with us on labs.windriver.com
Pendrive
This document provides an overview of a presentation about pen drives (USB flash drives). It discusses the structure, technology, components, and internal workings of pen drives. Key points include: pen drives use flash memory and a USB interface, their main components are a USB connector, controller chip, flash memory chip, and oscillator, data is stored on and accessed from the flash memory chip, and they provide advantages over other storage methods like floppy disks due to being smaller, faster, more durable, and having larger storage capacities.
Eclipse IDE
- Eclipse is an open-source integrated development environment originally developed by IBM. It started in 2001 and was released as open source software.
- The Eclipse platform consists of three main components: the runtime platform, the Java development toolkit (JDT), and the plug-in development environment.
- Plugins can be used to extend Eclipse's functionality and are available through the Eclipse marketplace. Common plugins include support for web development, UML modeling, and log viewing.
Programming paradigm and web programming
What is Programming Paradigm
Types of Programming Paradigm
What is web programming
How does it work
What are web programming languages
Module of Web Programming
HTML
CSS
JAVASCRIPT
PHP
ASP .NET
RUBY ON RAILS
JAVA
PYTHON
La actualidad más candente (20)
Building a Distributed Build System at Google Scale
Building a Distributed Build System at Google Scale
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El documento habla sobre el diagnóstico, pruebas y mantenimiento de equipos. Explica los diferentes tipos de software de diagnóstico como el POST y software específico de fabricantes, periféricos y sistemas operativos. También describe el proceso de arranque del hardware, herramientas de mantenimiento comunes y técnicas como la reparación por reemplazo de componentes.
PLAN DE SEGURIDAD DE COMPUTO
El documento presenta un plan de seguridad para un salón de computo de un tercer grado. Incluye secciones sobre virus informáticos, seguridad informática, riesgos en el salón, y estándares internacionales de seguridad. También incluye un reglamento para el salón de computo, tipos de virus comunes, mantenimiento correctivo y preventivo, y amenazas en línea. El objetivo es crear un plan de seguridad integral para proteger los equipos y la información en el salón de computo.
Sesiones 8
Este documento proporciona consejos sobre la descarga segura de archivos en Internet y sobre la obtención de drivers para dispositivos. Recomienda validar los sitios web antes de descargar archivos ejecutables y usar antivirus en línea. También define shareware, firmware y proporciona enlaces para identificar y descargar drivers perdidos.
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El documento describe diferentes tipos de mantenimiento de computadoras, incluyendo mantenimiento preventivo, predictivo y correctivo. El mantenimiento preventivo involucra revisiones periódicas para detectar problemas, el mantenimiento predictivo usa el monitoreo de parámetros para programar mantenimiento solo cuando es necesario, y el mantenimiento correctivo repara equipos cuando se detectan fallas. También recomienda herramientas y programas útiles para realizar diferentes tipos de mantenimiento, como CCleaner y Tuneup Utilities.
Trabajo de sistemas
El documento describe diferentes tipos de mantenimiento de computadoras, incluyendo mantenimiento preventivo, predictivo y correctivo. El mantenimiento preventivo implica revisiones periódicas para detectar problemas, el mantenimiento predictivo usa el monitoreo de parámetros para programar mantenimiento solo cuando es necesario, y el mantenimiento correctivo implica reparar equipos cuando se detectan fallas. También recomienda herramientas y programas como CCleaner y Tuneup Utilities para realizar mantenimiento.
Virus y vacunas informáticas
Este documento describe los virus informáticos, sus características, técnicas de programación y métodos de detección y eliminación. Los virus son programas dañinos que se replican a sí mismos e interfieren con sistemas de computadoras. Los antivirus usan técnicas como análisis heurístico y comprobación de integridad para detectar y eliminar virus. La educación de usuarios y uso de antivirus son estrategias clave para protegerse contra virus.
Virus y vacunas informáticas
Este documento describe los virus informáticos, sus características, técnicas de programación y métodos de detección y eliminación. Los virus son programas dañinos que se replican a sí mismos e interfieren con sistemas de computadoras. Los antivirus usan técnicas como análisis heurístico y comprobación de integridad para detectar y eliminar virus. La educación de usuarios y uso de antivirus son estrategias clave para protegerse contra virus.
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Este manual presenta información sobre el mantenimiento preventivo de hardware y software en computadoras personales. Explica conceptos como software, hardware, sistemas operativos y spyware. Detalla los pasos para realizar mantenimiento preventivo como limpiar el procesador y monitor. También describe diferentes tipos de mantenimiento como preventivo y correctivo, e indica que el preventivo debe realizarse cada 2-6 meses dependiendo del uso para detectar fallas, aumentar la vida útil del equipo y reducir costos.
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Averias
- 1. Comprobación hardware y Señales de avisos luminosos y acústicas Vicente Rivas Barranco Iván García Álvarez
- 2. Tipos de averías en un sistema informático Un sistema informático está compuesto por hardware y software, por lo que las averías se producen en estos dos tipos de elementos.
- 3. Averías Hardware Cualquier hardware puede fallar por causas como el ambiente, una incorrecta conexión o manipulación o por el deterioro del paso del tiempo. Así podemos encontrar fallos en cualquier componente del ordenador y dispositivo periférico.
- 4. Averías Software Aquí pueden fallar el software de sistema (sistema operativo, controladores de dispositivos,etc.) y de aplicación (programas instalados en el sistema operativos) y firmware como la BIOS.
- 5. Herramientas para detectar averías en un equipo Según el problema necesitaremos una herramienta u otra para resolverlo. Para manipular los componentes del equipo utilizaremos herramientas como destornilladores, pinzas, polímetro e incluso tarjeta de diagnóstico POST, para protegernos utilizaremos guantes de nitrilo o kevlar. Herramientas software utilizaremos aplicaciones que nos ayudan a descubrir los posibles problemas que pueda tener nuestro ordenador.
- 6. Protocolo de detección de averías Es conveniente seguir un protocolo ya que pueden haber muchas averías y asi organizarnos mejor de la avería que puede haber en nuestro equipo.
- 7. Protocolo de detección de averías
- 8. Protocolo de detección de averías
- 9. Señales de aviso luminosos y acusticos Pueden encontrarse errores en la pantalla que pueden salir tanto sonoros como un mensaje y ademas de esta hay otras señales de tipo luminoso para ver el estado de los dispositivos conectados a nuestro ordenador. Podemos comprobarlo con los LED del equipo, el estado de este podrá comprobarse en el manual del fabricante
- 10. Señales de aviso luminosos y acusticos
- 11. Preguntas