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Salesforce Build Applications Programmatically on the Salesforce Platform DEX-450 Exam Questions

Welcome to the comprehensive guide for the Salesforce DEX-450 exam, focusing on building applications programmatically on the Salesforce platform. This page is dedicated to providing you with all the necessary information to prepare effectively for the exam. Whether you are a seasoned developer or just starting your journey in Salesforce development, this resource will help you understand the official syllabus, delve into in-depth discussions, get insights on the expected exam format, and practice with sample questions. Achieving the Salesforce DEX-450 certification can significantly boost your career prospects in the field of Salesforce development. By mastering the concepts covered in this exam, you demonstrate your ability to design and implement custom applications using Apex and Visualforce, as well as extend Salesforce capabilities through declarative customization. Our goal here is to equip you with the knowledge and confidence needed to excel in the exam. So, let's dive into the intricacies of building applications programmatically on the Salesforce platform and pave the way for your success in the DEX-450 exam.

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4.8/5 Exam Rating | Updated 05 Sep, 2026 | 14 Exam Domains | Verified by Zack Warman Salesforce DEX-450 Certified Professional

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The Salesforce Build Applications Programmatically on the Salesforce Platform certification is a great choice for professionals who want to improve their skills in the DEX-450 exam. This Platform Developer I certification checks both your knowledge and your practical skills. It helps you understand the main concepts and shows that you can use tools, systems, and processes in real work situations.

The Salesforce DEX-450 exam shows employers that you have the skills needed to work with confidently. It can help you stand out when applying for jobs, support your career growth, and increase your professional skill. The Platform Developer I certification also keeps you up to date with the latest tools, technologies, and best practices from Salesforce, helping you stay ready for today's changing IT industry.

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Salesforce DEX-450 Exam Domains

1.0 Declarative Automation
2.0 Programming with Apex
3.0 Using SOQL and SOSL to Retrieve Your Org’s Data
4.0 Using DML to Manipulate Your Org’s Data
5.0 Deployment
6.0 Trigger Essentials
7.0 Apex Class Essentials
8.0 The Save Order of Execution, Apex Transactions, and Platform Events
9.0 Apex Testing
10 Strategies for Designing Efficient Apex Solutions
11 Trigger Design Strategies
12 Working with Visualforce
13 Visualforce Development Considerations and Testing
14 Lightning Components

Salesforce DEX-450 Exam Details (Official)

Vendor Salesforce
Exam Code DEX-450
Exam Name Build Applications Programmatically on the Salesforce Platform
Certification Platform Developer I
Expected Questions in Actual Exam 211

Salesforce Build Applications Programmatically on the Salesforce Platform Exam Objectives

  1. 1

    1.0 Declarative Automation

    • 1.1Create Formula Fields
    • 1.2Create Roll-Up Summary Fields
    • 1.3Understand Record Types
    • 1.4Review Other Automation Tools
    • 1.5Build a Data Model on the Salesforce Platform
  2. 2

    2.0 Programming with Apex

    • 2.1Describe Key Aspects of Apex That Differentiate It from Other Languages, Such as Java and C#
    • 2.2Describe Why Apex Transactions and Governor Limits Must Be Considered When Writing Apex
    • 2.3Execute Simple Apex
    • 2.4Use the sObject Data Type, the Primitive Data Types, and Basic Control Statements in Apex
  3. 3

    3.0 Using SOQL and SOSL to Retrieve Your Org’s Data

    • 3.1Write a Basic Query Using Salesforce’s Query Language, SOQL
    • 3.2Process the Result of a Query in Apex
    • 3.3Create a Query Dynamically at Run-Time
    • 3.4Use SOQL to Query Parent-Child Relationships
    • 3.5Describe a Relationship Query
    • 3.6Write a Query That Traverses a Child-to-Parent Relationship
    • 3.7Write a Query That Traverses a Parent-to-Child Relationship
    • 3.8Use SOSL to Search Data
  4. 4

    4.0 Using DML to Manipulate Your Org’s Data

    • 4.1List the Differences Between the Ways You Can Invoke DML Operations
    • 4.2Write Apex to Invoke DML Operations and Handle DML Errors
  5. 5

    5.0 Deployment

    • 5.1What Is Deployment?
    • 5.2Deploy Code Using Change Sets
    • 5.3Use the Ant Migration Tool
    • 5.4Review Managed and Unmanaged Packages
    • 5.5Explore Salesforce DX
  6. 6

    6.0 Trigger Essentials

    • 6.1Describe What a Trigger Is Used For
    • 6.2Describe the Syntax of a Trigger Definition
    • 6.3Use Trigger Context Variables
  7. 7

    7.0 Apex Class Essentials

    • 7.1Describe How Apex Classes Are Used
    • 7.2Define an Apex Class
    • 7.3Determine What Data an Apex Class Can Access
  8. 8

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

    • 8.1Describe Key Points in the Order of Execution
    • 8.2Describe How Triggers Fit Into and Can Be Impacted by the Order of Execution
    • 8.3Describe the Lifecycle of an Apex Transaction
    • 8.4Describe the Memory Lifecycle for Static Attributes
    • 8.5Use Platform Events for Immediate Error Logging
  9. 9

    9.0 Apex Testing

    • 9.1Describe the Apex Testing Framework
    • 9.2Create Test Data
    • 9.3Write and Run an Apex Test
    • 9.4Test Best Practices
  10. 10

    10 Strategies for Designing Efficient Apex Solutions

    • 10.1Describe Best Practices for Writing Code That Is Easy to Maintain and Extend
    • 10.2Write Triggers and Classes That Assume Batches of Data as Input
    • 10.3Write Code That Works Efficiently with the Database, Both in Querying and Using DML
  11. 11

    11 Trigger Design Strategies

    • 11.1List Declarative Mechanisms You Can Use to Implement Complex Business Logic, What Types of Problems They’re Best Used for, and Their Limitations
    • 11.2Describe Ways in Which You Can Use Declarative Functionality to Improve Your Programmatic Solutions
  12. 12

    12 Working with Visualforce

    • 12.1Create a Visualforce Page
    • 12.2Reference a Standard Controller
    • 12.3Launch a Visualforce Page Using a Custom Button
    • 12.4Display Data from a Record in a Visualforce Page
    • 12.5Reference Custom Controllers and Controller Extensions
    • 12.6Work with List Controllers
  13. 13

    13 Visualforce Development Considerations and Testing

    • 13.1Describe Common Limit Issues and Security Concerns
    • 13.2Describe Strategies for Testing Visualforce Controllers
    • 13.3Write Tests for Controller Constructors
    • 13.4Write Tests for Action Methods, Getters, Setters, and Properties
  14. 14

    14 Lightning Components

    • 14.1Create and Surface an Aura Component
    • 14.2Create and Surface a Lightning Web Component

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Updated: 05 Sep, 2026 Number of Practice Questions: 201
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