Salesforce DEX-450 : Programmatic Development using Apex and Visualforce in Lightning Experience

DEX-450 real exams

Exam Code: DEX-450

Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience

Updated: Sep 02, 2026

Q & A: 202 Questions and Answers

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What is the duration, language, and format of Salesforce DEX-450 Exam

  • This exam is offered in only English.
  • Certification Validity period : 3 years.
  • There is a time limit of 120 minutes for the exam.
  • Passing score 80%
  • The type of questions is Multiple Choice and situation-based questions.
  • This exam consists of 85 questions

The validity of the Salesforce DEX-450 certification is three years.

How to Prepare for Salesforce DEX-450 Exam

Preparation Guide for Salesforce DEX-450 Exam

Introduction

Salesforce is a solution for managing customer relationships that unite customers and companies. This is an interactive CRM platform that provides a single, shared view of every client in all the divisions including marketing, distribution, exchange, and operation. Provide the clients with the individual experience Salesforce demand 360 product via the Integrated CRM Platform. It delivers solid and related goods to boost marketing, revenue, exchange, operation, IT, and more. Salesforce is a digital cloud computing (SaaS) firm specializing in the management of client relationships (CRMs). There was a mistake. The app is now the number one of consumer satisfaction and allows organizations to track customer behavior, advertise to consumers, and more. Salesforce is common because it is bundled with features such as contact management, workflow development, task management, incentive monitoring, teamwork tools, customer experience tools, analytics, and interactive, smartphone dashboard.

How to book the Salesforce DEX-450 Exam

There are the following steps for registering the Salesforce DEX-450 exam:

Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method

Average Salary for Salesforce DEX-450 Exam Certified Professional

Salesforce administrator roles are in great demand nowadays. The average salaries of Salesforce DEX-450 exam Certified professional in:

  • England - 70,400 POUND
  • India - 16,42,330 INR
  • United State - 105,100 USD
  • Europe - 72,300 Euro

Reference: https://trailhead.salesforce.com/en/academy/classes/dex450-build-applications-programmatically-on-the-salesforce-platform/

Salesforce DEX-450 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Apex Fundamentals10%- Apex Basics
  • 1. Apex operators and control flow statements
  • 2. DML operations (insert, update, delete, etc.)
  • 3. Using SOQL to query Salesforce data
  • 4. Apex variables and data types
- Apex Primitives
  • 1. Integer, Double, Long, String, Boolean types
  • 2. Date, Datetime, Time classes
  • 3. ID and sObject types
Topic 2: Apex Triggers12%- Trigger Syntax and Context Variables
  • 1. Trigger.newMap and Trigger.oldMap
  • 2. Trigger events (before insert, after insert, etc.)
  • 3. Trigger.old and Trigger.new context variables
- Trigger Best Practices
  • 1. One trigger per object pattern
  • 2. Handler class patterns
  • 3. Recursive trigger prevention
Topic 3: Apex Classes and Interfaces12%- Apex Interfaces
  • 1. When to use interfaces
  • 2. Interface definition and implementation
- Apex Classes
  • 1. Class structure (attributes, methods, constructors)
  • 2. Inheritance and virtual/abstract classes
  • 3. Access modifiers (public, private, protected, global)
Topic 4: Working with Data - SOQL and SOSL15%- SOSL (Salesforce Object Search Language)
  • 1. SOSL syntax and use cases
  • 2. Returning sObjects from SOSL
- SOQL (Salesforce Object Query Language)
  • 1. Relationship queries (parent-child, child-parent)
  • 2. Query options (LIMIT, ORDER BY, WHERE)
  • 3. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
  • 4. Basic SOQL queries
Topic 5: Apex Transaction Management10%- Governor Limits
  • 1. SOQL query limits
  • 2. CPU time and heap size limits
  • 3. DML statement limits
- Transaction Control
  • 1. System.debug() usage
  • 2. Savepoint and rollback
  • 3. Database methods with allOrNone parameter
Topic 6: Apex Testing13%- Testing Best Practices
  • 1. Coverage requirements (75% for deployment)
  • 2. Assert statement usage
  • 3. Using seeAllData=false for isolated tests
- Test Classes
  • 1. Test data creation methods
  • 2. Test.startTest() and Test.stopTest()
  • 3. @isTest annotation
Topic 7: Visualforce Pages8%- VF Standard Components
  • 1. , ,
  • 2. ,
  • 3. Action methods and pageReference
- VF Page Basics
  • 1. component structure
  • 2. Controllers and controller extensions
  • 3. Visualforce expressions
Topic 8: Asynchronous Apex10%- Future Methods
  • 1. @future annotation
  • 2. AsyncRequestLimit exceeded handling
- Batch Apex
  • 1. Database.Batchable interface
  • 2. Database.Stateful
  • 3. start(), execute(), and finish() methods

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