Salesforce DEX-450日本語 Q&A - in .pdf

  • 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 30, 2026
  • Q & A: 202 Questions and Answers
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Salesforce DEX-450日本語 Q&A - Testing Engine

  • 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 30, 2026
  • Q & A: 202 Questions and Answers
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To prepare for the Salesforce DEX-450 certification exam, candidates should have a solid understanding of the Apex programming language, Visualforce framework, and Lightning Components. Candidates should also be familiar with the Salesforce development process, including designing, developing, testing, and deploying custom applications. Studying the Salesforce documentation, attending training courses, and practicing hands-on development are all effective ways to prepare for DEX-450J exam. Passing DEX-450J exam can enhance a developer's career prospects and demonstrate their expertise in programmatic development on the Salesforce platform.

To be eligible for the DEX-450 certification exam, candidates must have a solid understanding of both the Apex programming language and Visualforce, as well as experience working with Lightning Experience. They must also have a comprehensive understanding of the Salesforce platform and be able to design and develop custom applications that meet business requirements.

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

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Salesforce DEX-450日本語 Exam Syllabus Topics:

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

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