Understanding the Internet: Services, Web 2.0, and More
Internet and Services
The Internet is a worldwide network of computers, allowing a large number of devices to connect through various communication protocols. This network provides a wide range of services:
- Web Browsing (WWW): A system of linked documents and files accessible through a web browser.
- E-mail: Sending messages between users.
- Newsgroups, Forums, Instant Messaging
- File Transfer: Quickly transfer files through FTP and file sharing.
- Voice Communication (VoIP) or Videoconference
- Radio, Television,
Java: A Beginner’s Introduction to Programming
Java Programming Language
Identifiers
An identifier is a name given to any element of a program.
Keywords
Predefined identifiers for the exclusive use of the language.
Rules for Identifiers
- Can be any length of characters.
- The first character must be a letter.
- Should not include spaces.
- Can be uppercase or lowercase.
Case Sensitivity
Java is case-sensitive; identifiers like ‘age’, ‘Age’, and ‘AGE’ are considered different.
Points to Remember
- In class names, each word starts with a capital letter.
- The first word
Understanding CPU Interrupts: Types, Handling, and Addressing Modes
Understanding CPU Interrupts
What is an Interrupt?
In computing, an interrupt is the ability of the CPU to pause the execution of a program, execute another routine (the interrupt handler), and then return to the original program to resume execution.
Types of Interrupts
Interrupts can be broadly classified into two types:
Software Interrupts
These are generated by software programs to indicate error conditions, such as:
- Attempting to divide by zero
- Unauthorized memory access
- Attempting to execute an erroneous
Diagramming Techniques and Process Mapping
Diagramming Techniques and Applications
Diagramming is a powerful technique used to visually represent events, situations, movements, relationships, and processes of all kinds using symbols. This document explores various aspects of diagramming, including its advantages, types, and applications.
Key Concepts and Advantages of Diagramming
- What is layout?
Layout is the act of planning and arranging events, situations, movements, and relationships using symbols. - What are some advantages of the diagramming
Understanding Binary: The Foundation of Digital Computing
What is “Digital”?
The term “binary” implies “two.” Thus, the binary number system is a system of numbers based on two possible digits – 0 and 1. This is where the strings of binary digits come in. Each binary digit, or “bit”, is a single 0 or 1, which directly corresponds to a single “switch” in a circuit. Add enough of these “switches” together, and you can represent more numbers. So instead of 1 digit, you end up with 8 to make a byte. (A byte, the basic unit of storage, is simply defined as
Read MoreMicroprocessors, RAM, BIOS, Chipset, and Buses
Microprocessor: The Brain of Your Computer
A microprocessor is the central processing unit (CPU) of a computer, responsible for executing instructions. Its primary function is to fetch instructions from memory and execute them. Several factors influence a microprocessor’s speed:
- System Clock: Synchronizes the processor. Clock frequency, measured in MHz (megahertz), indicates millions of cycles per second.
- Bus Width: Determines the amount of data the CPU can transmit simultaneously to the main memory,