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

  • Exam Code: DEX-450J
  • Exam Name: Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版)
  • Updated: Aug 18, 2026     Q & A: 202 Questions and Answers

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

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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.

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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.

Salesforce DEX-450日本語 Exam Syllabus Topics:

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

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