Learn API, REST, JSON, XML and WEB Basics

Explore the difference between API and REST, learn how REST API uses JSON as a data interchange format, and review tokens and API management tools to access and manage APIs.

Learn how servers host reusable services and how clients access them through web services using soap, with XML and JSON data exchanged in a clear request and response interface.

Describe representational state transfer as a web design pattern, not a protocol, and explore Roy Fielding's six rest design patterns—client-server, stateless, cacheable, layered, code on demand, and uniform interface.

Compare web service and API by showing that a web service uses WSDL and specific protocols, while an API is a vendor-defined interface for applications, not bound to the web.

Explore how rest json api combines rest, json, and api to exchange messages between systems, using json as the lightweight message format.

Learn how authentication and authorization control access to a token-based rest API, using a user ID and password to obtain a token and perform allowed operations like get or post.

Understand how api management tools control access, deployment, and analytics, with automatic documentation, token-based authentication, and rate limits for json and rest apis.

Discover JSON basics as a lightweight, human readable data format for interchanging information, with syntax, data types, arrays and objects, plus XML comparison and JavaScript object literals.

Compare json and xml, highlighting json's lightweight, text-based format and speed advantages for simple data exchange, versus xml's robust namespaces and b2b standards for complex processes.

Understand how json derives its name from javascript and how javascript object literals map to json data, including product id, product name, and product price.

Master JSON syntax by following seven rules: curly braces enclose data, keys in double quotes with colons, commas separate key-value pairs, and arrays use square brackets.

Discover the six JSON data types: number, string, boolean, null, array, and object, and master the syntax with braces, brackets, colons, and quotes.

Explore JSON arrays, including arrays of strings, integers, arrays of arrays, and arrays of objects, using square brackets, curly braces, quotes, and proper comma placement.

Learn how to define JSON objects with key-value pairs inside curly braces, using quotes. Learn to embed an array inside an object, using integer, string, decimal, and boolean values.

Explore json syntax and data types, then format, validate, and pretty print json using json lint. Use json editor online to view and interact with arrays, objects, booleans, and nulls.

Learn to read real-time json using json lint and editor, understand objects, arrays, keys, and values, and explore open weather map api and json vs xml formats.

Create a json file with .json extension defining a student with id, name, class, age, and address; include phone array and a null paid field, mirror in xml, compare sizes.

Learn XML fundamentals by defining Extensible Markup Language, reading and writing XML with tags, elements, attributes, and namespaces, and validating documents as well formatted, valid, or invalid using XSD.

Learn how XSD and DTD define XML structure and validate documents, detailing elements, attributes, data types, cardinality, default and mandatory rules, and practical validation tools.

Explore XPath basics to identify and navigate XML nodes, using forward slash and double slash, attributes, and text functions to read and extract data from XML with practical examples.

Analyze the communication gap between buyers and sellers and how language and distance challenges are solved by the internet using TCP, IP, and related protocols.

A protocol is a set of rules that enables two devices to communicate by agreeing on a language. It uses tcp/ip, wifi, infrared, and bluetooth to illustrate data transfer.

The internet is a network of computers connected by a single wire, enabling communication, data exchange, and identification across distances through the TCP/IP protocol.

Understand how the tcp/ip protocol connects computers and transfers data using unique ip addresses. Learn how dynamic numbers and dns domain names help you reach hosts like yahoo.com or google.com.

Explore how the domain name system uses dns servers to map domain names to ip addresses, letting users reach servers like bob.com without memorizing numeric addresses.

Understand how HTTP, the hypertext transfer protocol built on TCP/IP, transfers hypertext such as images, videos, and JSON or XML files across the web.

Learn how HTTP functions as a web protocol enabling client requests and server responses, covering request methods, content types, status codes, and port basics.

Master the client side and server side roles as the requester sends requests and the provider replies over http, illustrating the client-server technology and the request-response pattern.

Explain how a website uses client-server requests and a web server to fetch files like HTML, images, and videos, via HTTP and IP addresses.

Explore language types: programming, scripting, and markup. See examples like C, Java, PHP, JavaScript, Python, HTML, and XML, and how programming languages interact with machines.

Compare compiler languages—like C, C++, and Java—that compile to machine code before running, with interpreter languages—like PHP, JavaScript, Python, and Ruby—that run directly.

Learn how web services enable XML-based communication over HTTP using SOAP, WSDL, and UDDi. See how clients invoke services and how WSDL defines methods and parameters.

Explore how service oriented architecture and enterprise service bus enable loosely coupled services, service orchestration, and scalable integration across systems.