Build Applications Programmatically on the Salesforce Platform (DEX450)

Declarative Automation

• Create Formula Fields
• Create Roll-Up Summary Fields
• Understand Record Types
• Review Other Automation Tools
• Build a Data Model on the Salesforce Platform

Programming with Apex

• Describe Key Aspects of Apex That Differentiate It from Other Languages, Such as Java and C#
• Describe Why Apex Transactions and Governor Limits Must Be Considered When Writing Apex
• Execute Simple Apex
• Use the sObject Data Type, the Primitive Data Types, and Basic Control Statements in Apex

Using SOQL and SOSL to Retrieve Your Org’s Data

• Write a Basic Query Using Salesforce’s Query Language, SOQL
• Process the Result of a Query in Apex
• Create a Query Dynamically at Run-Time
• Use SOQL to Query Parent-Child Relationships
• Describe a Relationship Query
• Write a Query That Traverses a Child-to-Parent Relationship
• Write a Query That Traverses a Parent-to-Child Relationship
• Use SOSL to Search Data

Using DML to Manipulate Your Org’s Data

• List the Differences Between the Ways You Can Invoke DML Operations
• Write Apex to Invoke DML Operations and Handle DML Errors

Deployment

• What Is Deployment?
• Deploy Code Using Change Sets
• Use the Ant Migration Tool
• Review Managed and Unmanaged Packages
• Explore Salesforce DX

Trigger Essentials

• Describe What a Trigger Is Used For
• Describe the Syntax of a Trigger Definition
• Use Trigger Context Variables

Apex Class Essentials

• Describe How Apex Classes Are Used
• Define an Apex Class
• Determine What Data an Apex Class Can Access

The Save Order of Execution, Apex Transactions, and Platform Events

• Describe Key Points in the Order of Execution 
• Describe How Triggers Fit Into and Can Be Impacted by the Order of Execution 
• Describe the Lifecycle of an Apex Transaction
• Describe the Memory Lifecycle for Static Attributes
• Use Platform Events for Immediate Error Logging

Apex Testing

• Describe the Apex Testing Framework
• Create Test Data
• Write and Run an Apex Test
• Test Best Practices

Strategies for Designing Efficient Apex Solutions

• Describe Best Practices for Writing Code That Is Easy to Maintain and Extend 
• Write Triggers and Classes That Assume Batches of Data as Input
• Write Code That Works Efficiently with the Database, Both in Querying and Using DML 

Trigger Design Strategies

• List Declarative Mechanisms You Can Use to Implement Complex Business Logic, What Types of Problems They’re Best Used for, and Their Limitations
• Describe Ways in Which You Can Use Declarative Functionality to Improve Your Programmatic Solutions 

Working with Visualforce

• Create a Visualforce Page
• Reference a Standard Controller
• Launch a Visualforce Page Using a Custom Button
• Display Data from a Record in a Visualforce Page
• Reference Custom Controllers and Controller Extensions
• Work with List Controllers

Visualforce Development Considerations and Testing

• Describe Common Limit Issues and Security Concerns
• Describe Strategies for Testing Visualforce Controllers
• Write Tests for Controller Constructors
• Write Tests for Action Methods, Getters, Setters, and Properties

Lightning Components

• Create and Surface an Aura Component
• Create and Surface a Lightning Web Component

The prerequisites include a solid understanding of Salesforce concepts and functionality, and completion of the following trailmix on Trailhead: Programmatic Development Using Apex and Visualforce Pre-work.