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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 28, 2026

Q & A: 202 Questions and Answers

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About Salesforce DEX-450 Exam

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

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

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Benefits in Obtaining Salesforce DEX-450 Certification

71 percent of bachelor's degree expert methodology and energetic methodology certified methodologists receive up to another 16 percent are recorded in the Salesforce annual analytical compensation survey. The certification from Salesforce DEX-450 strengthens your expertise as well as your know-how to ensure that your views are agile in a system of market research. The physical test applicants of the Salesforce DEX-450 certification perceive a fresh advantage on other comrades when being interviewed. In the project market, aspirants find themselves even more aggressive. Salesforce DEX-450 is understood worldwide so that certified aspirants, along with methods of organizational analysis, are simply more self-confident.

The DEX-450 qualification from Salesforce enhances your expertising and expertise to apply an agile perspective within a system of corporate research. At the interview DEX-450 examiners pick a corner over other comrades. In the labour market, aspirants are more competitive.

Introduction to Salesforce DEX-450 Exam

This qualification concentrates on the programmer's validation of abilities, such as the programming of programs. Salesforce DEX-450 certification acknowledges that the applicant has the potential to conform his / her Salesforce applications to the heart of the Pinnacle programming language and the visual power diagram. The credential offers a better indicator of the competences which you have established to provide prospective employers. Professionals need to gain functional expertise in constructing and programming data objects (sObjectiles) to retrieve, modify and store data from these objects. Specify custom logic with Apex triggers and classes and use the built-in testing system to test this logic. This Guide covers all facets of the DEX-450 Test, the salary of the accredited specialist Salesforce DEX-450 and all the aspects of the Salesforce DEX-450 certification.

The Salesforce DEX-450 exam is a competency qualification test that acknowledges your capability growth. You need industry expertise to attempt the test. Professionals should execute the following duties following certification:

  • Using the combined Apex and Visual Powers evaluation system.
  • Using a declarative GUI to build and change subjects
  • Write Visualforce and code for user interface setup
  • Describe a range of the main features of multi-tenant programme architecture
  • Develop programmatic implementations that benefit from declarative personalizations
  • Write customizations of business logic using triggers and classes from Apex. SOQL and DML are used with these customizations.
  • Describe how the trigger code functions in the Save Execution Order

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

  • This exam is offered in only English.
  • There is a time limit of 120 minutes for the exam.
  • Certification Validity period : 3 years.
  • 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.

Salesforce DEX-450 Exam Syllabus Topics:

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

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