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Exam Code: DEX-450
Exam Name: Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版)
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developer

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DEX-450日本語

Last Updated: Oct 29, 2026

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Salesforce DEX-450日本語 Exam Overview:

Certification Vendor:Salesforce
Exam Name:Programmatic Development using Apex and Visualforce in Lightning Experience
Exam Number:DEX-450
Exam Format:Multiple Select, Multiple Choice
Certificate Validity Period:2 years (for certification)
Real Exam Qty:60
Passing Score:68%
Exam Price:$200 USD
Related Certifications:Platform Developer II (PDII)
Salesforce Certified Administrator
Available Languages:English
Exam Duration:120 minutes
Sample Questions: DOWNLOAD DEMO
Exam Way:In-person testing center or online proctored exam
Pre Condition:No formal prerequisites, but recommended: 1-2 years Apex development experience, completion of Salesforce Developer Beginner and Intermediate Trailhead modules
Official Syllabus URL:https://trailhead.salesforce.com/credentials/platform-developer-exam

Salesforce DEX-450日本語 Exam Syllabus Topics:

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

Your Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) Exam Questions, Answered

What training is recommended for the DEX-450日本語 exam?

Salesforce recommends these training resources for the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam:

    Follow the training with steady self-testing — the 202 practice questions from Actual4Cert help you apply theory and fill any gaps the training leaves.

    What domains does the DEX-450日本語 exam consist of?

    The official Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) outline defines 8 domains. The leading three are Apex Triggers (12%), Apex Fundamentals (10%), and Apex Classes and Interfaces (12%). The full list is in the topics section above, and Actual4Cert's 202 practice questions cover each one.

    How do I register for the DEX-450日本語 exam?

    In-person testing center or online proctored exam Register for the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam through these official channels:

      After booking, Actual4Cert delivers your practice questions within 1 minute — preparation starts the same day.

      How many questions are on the DEX-450日本語 exam, and how long is it?

      The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam contains 60 to complete within 120 minutes. Timed simulation in the Actual4Cert Desktop Test Engine teaches that rhythm before exam day does.

      How does the Actual4Cert refund policy work for the DEX-450日本語 exam?

      Actual4Cert issues a full refund if you take the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam within 60 days of purchase and do not pass. The policy does not apply if the exam is taken within 3 days of purchase, if the exam was never actually taken, or to free materials or expired orders, and the candidate name must match the payer name. Submit a scan of your enrollment slip and the official Score Report PDF within 2 days of the exam; claims are processed within 7 days. Alternatively, exchange for two free exam products of equal value and keep your original update service. Orders arrive by email within 1 minute — contact support if nothing arrives within 2 hours.

      What does the DEX-450日本語 certification exam involve?

      The DEX-450日本語 exam is a Salesforce certification exam validating the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) syllabus shown above. It belongs to these credential paths: Platform Developer II (PDII), Salesforce Certified Administrator. Candidates in 2026 prepare for it with Actual4Cert's 202 practice questions, available as a printable PDF, a Windows Desktop Test Engine, and an Online Test Engine — three versions of the same materials.

      Do I need any prerequisites for the DEX-450日本語 exam?

      No formal prerequisites, but recommended: 1-2 years Apex development experience, completion of Salesforce Developer Beginner and Intermediate Trailhead modules Since requirements change over time, confirm the latest on the official Salesforce exam page before scheduling.

      What is the passing score for the DEX-450日本語 exam, and what is the fee?

      The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam requires 68% to pass, and registration costs $200 USD. A failed attempt means paying the same fee again — a readiness check with the Actual4Cert engines before booking is the cheaper option.

      What exactly does the Actual4Cert DEX-450日本語 package include?

      Three versions of the same study materials: a printable, expert-prepared PDF with free demo download and instant access; a Desktop Test Engine for Windows with customizable simulation and timed modes that works offline; and an Online Test Engine for any browser on Windows, Mac, Android, and iOS with test history and performance review. All 202 practice questions are identical across versions. Every purchase includes 365 days of free updates, a 50% renewal discount afterward, and unlimited computer installations.

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

      Question #1

      Universal Containers は、Classic から Lightning Experience に移行することを決定しました。同社は、事前に入力された値を使用してレコードを作成するために使用されていた JavaScript ボタンを置き換えるよう開発者に依頼しました。
      開発者はこれを実現するために何を使用できるでしょうか?

      • A. トリガーされたフローを記録する
      • B. クイックアクション
      • C. 検証ルール
      • D. Apex トリガー
      Reveal Solution  Discussion  0

      Correct Answer: B  🗳️

      Question #2

      Aura アプリケーション イベント伝播フレームワークのフェーズはどれですか?
      2つの回答を選択してください

      • A. デフォルト
      • B. 放出
      • C. コントロール
      • D. バドル
      Reveal Solution  Discussion  0

      Correct Answer: A,D  🗳️

      Question #3

      開発者は、連絡先情報を収集するためのカスタム Lightning Web コンポーネントを構築するタスクを負っています。
      フォームは組織内のさまざまなタイプのユーザー間で共有されます。特定のフィールドのみが特定のユーザー グループによって編集および表示できるようにするというセキュリティ要件があります。
      セキュリティ要件をサポートするために、開発者は Lightning Web コンポーネントで何を使用すればよいでしょうか?

      • A. 雷入力失敗
      • B. オーラ入力失敗
      • C. UI入力に失敗しました
      • D. 強制入力に失敗しました
      Reveal Solution  Discussion  0

      Correct Answer: D  🗳️

      Question #4

      新機能開発の一環として、開発者は、ステートフル クライアントで実行されるタッチ イベントに応答できるレスポンシブ アプリケーションを構築するよう求められます。
      ビジネス要件を完全にサポートするフレームワーク上に構築されている 2 つのテクノロジはどれですか。2 つの回答を選択してください。

      • A. オーラコンポーネント
      • B. Visualforce ページ
      • C. Lightning Web コンポーネント
      • D. Visualforce コンポーネント
      Reveal Solution  Discussion  0

      Correct Answer: A,C  🗳️

      Question #5

      組織には、レコード更新要素を使用して商談を編集する既存のフローがあります。開発者は、フローを更新して連絡先も作成し、作成された連絡先の ID を商談に保存する必要があります。
      開発者はフロー内でどの更新を行う必要がありますか?

      • A. 新しい Get Records 要素を追加します。
      • B. 新しいロールバックレコード要素を追加します。
      • C. 新しいレコード作成要素を追加します。
      • D. 新しい更新レコード要素を追加します。
      Reveal Solution  Discussion  0

      Correct Answer: C  🗳️

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