Computer Peripherals: Types and Features
Advantages of LCD Monitors
What are the advantages of an LCD monitor?
LCD monitors are flat, which reduces glare and reflections. They are not bulky or heavy, and they do not use cathode rays. Therefore, they do not generate electromagnetic interference. They use digital technology, with little emission of radiation and a very low flash. They also consume less energy and make better use of visible space.
Keyboard Functions and Types
Checking for Key Presses
How do I check if a key is pressed on the keyboard?
Read MoreUnderstanding Computer Hardware & IT Concepts
Understanding Computer Hardware & IT Concepts
UPS (Uninterruptible Power Supply): A battery that automatically provides an electricity supply to allow the server to shut itself down properly if the main power supply fails.
Processor: The most important part of the computer. It processes data and controls the computer.
Memory:
- RAM (Random Access Memory): Holds the program instructions and the data that is being used by the processor.
- ROM (Read Only Memory): Holds the program instructions and settings
Network Essentials: Security, Components, and Usage
Network Passwords and Security
Usually, you need a password to use a network. It is important to keep your password secret. The following rules make a password more difficult to guess:
- Should be at least 6 characters long.
- Have a mixture of numbers and letters.
- Include both capital and small letters.
- Be easy to remember.
Should not:
- Be a word from a dictionary.
- Be a common name.
- Include spaces, hyphens, dots, or
*$.
If the cable fails, the whole network will fail. If you don’t use the right password, you
Read MoreJDBC: Connecting Java Applications to Databases
Introduction to JDBC (Java Database Connectivity)
JDBC stands for Java Database Connectivity. JDBC is a Java API used to connect and execute queries with a database. It is a specification from Sun Microsystems that provides a standard abstraction (API or protocol) for Java applications to communicate with various databases. It provides the language with Java database connectivity standards and is used to write programs required to access databases. JDBC, along with the database driver, can access
Read MoreOperating Systems: Essential Concepts and Evolution
Operating Systems
An operating system (OS) is a program, or set of computer programs, designed to allow effective management of a computer’s resources. It manages the hardware of the machine from the most basic levels, allowing user interaction.
Basic Functions
An OS enables and simplifies the management of a PC. It plays a number of essential basic functions, each performed by an internal component:
- Provides comfort in using resources efficiently.
- Manages equipment for running services, the user interface,
Understanding Database Concepts: Definitions and Models
Understanding Database Concepts
Tip: A set of characters that have a specific meaning.
Information: Specific data according to user needs.
Field: A space filled with requested data.
Registration: Fields of similar or different types filled with information.
File: A collection of records following a defined structure.
Database: A collection of files created to encompass and reduce information. Its three components are hardware, DBMS software, and the data being handled.
DBMS (Database Management System)
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