Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) : DEX-450日本語

  • Exam Code: DEX-450日本語
  • Exam Name: Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版)
  • Updated: Sep 08, 2026     Q & A: 202 Questions and Answers

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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:

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

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.

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

Salesforce DEX-450日本語 Exam Syllabus Topics:

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

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