try / catch / finally What Is Exception Handling? Exception handling lets your code handle errors gracefully instead of crashing. Simple Explanation It’s like a seatbelt—you hope you won’t need it, but it protects you when something goes wrong. Real-Life Example If an ATM transaction fails, you get a message—not...
Inheritance & Polymorphism What Is Inheritance? Inheritance allows a child class to reuse properties and methods of a parent class. Simple Explanation A child inherits features from parents. Real-Life Example Parent: Vehicle Child: Car, Bike Both are vehicles, but each behaves differently. Code Example (Inheritance) public class Vehicle { public...
Classes & Methods What Is a Class in Apex? A class is a blueprint that defines behavior (methods) and data (variables). Simple Explanation A class is like a recipe, and methods are the steps. Code Example public class Car { public void drive() { System.debug(‘Car is moving’); } } What...
List, Set & Map in Apex What Are Collections? Collections are used to store multiple values in one variable.They are essential in Apex for bulk processing and performance. Simple Explanation Collections are like containers that hold many items together. List (Ordered & Allows Duplicates) When to Use List Order matters...
Conditional Statements: if / else, switch What Are Conditional Statements? Conditional statements allow Apex to make decisions based on conditions. Simple Explanation “If this condition is true, do this. Otherwise, do something else.” if / else Statement Real-Life Example If your bank balance is enough → you can buy a...
Variables, Data Types & Operators What Are Variables in Apex? A variable is a container used to store data that your program can use or change. Simple Explanation Variables are like labeled boxes where you store information. Common Data Types in Apex Apex supports primitive data types similar to Java....
What Is Salesforce Architecture? Salesforce is built on a multi-tenant cloud architecture.This means many companies use the same Salesforce platform, but each company’s data is securely separated. Real-Life Example (Easy to Remember) Think of Salesforce like a shopping mall: Mall = Salesforce platform Individual shops = Salesforce Orgs Security shutters...
This post teaches the core Salesforce Apex language fundamentals you must know: syntax basics, classes/methods/constructors, method overloading, collections (List/Set/Map), SOQL + DML, exception handling, access modifiers, and the #1 bulk pattern (Ids → Query → Map → Apply → DML). It also includes a beginner mistake checklist and interview questions....
In Salesforce development — whether you’re working with Apex, LWC, Visualforce, or external integrations — even small mistakes can create serious security risks. Poor handling of user input or secrets can lead to data exposure, code execution, or unauthorized access. To protect your Salesforce org, there are three essential security...
Building reliable Salesforce integrations means balancing security, user experience, and resilience. You want secure authentication, non-blocking calls for the UI, and smart retry logic that doesn’t break governor limits. In this guide, we’ll walk through how to achieve all three using: Named Credentials for configuration-based security OAuth/JWT for headless authentication...
