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

DEX-450日本語 actual test
  • Exam Code: DEX-450J
  • Exam Name: Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版)
  • Updated: Sep 12, 2026
  • Q & A: 202 Questions and Answers
  • Go To DEX-450日本語 Questions
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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
Real Exam Qty:60
Passing Score:68%
Certificate Validity Period:2 years (for certification)
Exam Price:$200 USD
Available Languages:English
Exam Format:Multiple Select, Multiple Choice
Exam Duration:120 minutes
Related Certifications:Platform Developer II (PDII)
Salesforce Certified Administrator
Sample Questions:Salesforce DEX-450日本語 Sample Questions
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 Fundamentals10%- Apex Basics
  • 1. Using SOQL to query Salesforce data
  • 2. Apex operators and control flow statements
  • 3. Apex variables and data types
  • 4. DML operations (insert, update, delete, etc.)
- Apex Primitives
  • 1. ID and sObject types
  • 2. Integer, Double, Long, String, Boolean types
  • 3. Date, Datetime, Time classes
Topic 2: Apex Triggers12%- Trigger Syntax and Context Variables
  • 1. Trigger events (before insert, after insert, etc.)
  • 2. Trigger.old and Trigger.new context variables
  • 3. Trigger.newMap and Trigger.oldMap
- Trigger Best Practices
  • 1. Recursive trigger prevention
  • 2. One trigger per object pattern
  • 3. Handler class patterns
Topic 3: Working with Data - SOQL and SOSL15%- SOSL (Salesforce Object Search Language)
  • 1. Returning sObjects from SOSL
  • 2. SOSL syntax and use cases
- SOQL (Salesforce Object Query Language)
  • 1. Relationship queries (parent-child, child-parent)
  • 2. Query options (LIMIT, ORDER BY, WHERE)
  • 3. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
  • 4. Basic SOQL queries
Topic 4: Apex Transaction Management10%- Transaction Control
  • 1. System.debug() usage
  • 2. Database methods with allOrNone parameter
  • 3. Savepoint and rollback
- Governor Limits
  • 1. CPU time and heap size limits
  • 2. SOQL query limits
  • 3. DML statement limits
Topic 5: Visualforce Pages8%- VF Page Basics
  • 1. Visualforce expressions
  • 2. component structure
  • 3. Controllers and controller extensions
- VF Standard Components
  • 1. , ,
  • 2. ,
  • 3. Action methods and pageReference
Topic 6: Asynchronous Apex10%- Batch Apex
  • 1. Database.Batchable interface
  • 2. start(), execute(), and finish() methods
  • 3. Database.Stateful
- Future Methods
  • 1. @future annotation
  • 2. AsyncRequestLimit exceeded handling
Topic 7: Apex Testing13%- Test Classes
  • 1. @isTest annotation
  • 2. Test data creation methods
  • 3. Test.startTest() and Test.stopTest()
- Testing Best Practices
  • 1. Coverage requirements (75% for deployment)
  • 2. Assert statement usage
  • 3. Using seeAllData=false for isolated tests
Topic 8: Apex Classes and Interfaces12%- Apex Interfaces
  • 1. Interface definition and implementation
  • 2. When to use interfaces
- Apex Classes
  • 1. Inheritance and virtual/abstract classes
  • 2. Access modifiers (public, private, protected, global)
  • 3. Class structure (attributes, methods, constructors)

Common Questions Candidates Ask About DEX-450日本語

The DEX-450日本語 exam (Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版)) is the official Salesforce exam that leads to the Salesforce Developer certification, a credential at the Platform Developer I level. Related certifications include Platform Developer II (PDII), Salesforce Certified Administrator. Actual4test provides 202 practice questions to help you prepare for it with confidence.

The DEX-450日本語 exam contains 60 questions and gives you 120 minutes to finish them. Before exam day, divide the total time by the question count so you know the pace you need to keep, and flag difficult items instead of getting stuck on them. Running at least one full timed session in the Actual4test test engine is the best way to make that time pressure feel familiar.

You need 68% to pass, and the official registration fee is $200 USD. Keep in mind that a failed attempt means paying that fee in full again, so it pays to test yourself first. When your scores on the Actual4test timed practice tests stay consistently above the passing line, you are ready to book the exam.

No formal prerequisites, but recommended: 1-2 years Apex development experience, completion of Salesforce Developer Beginner and Intermediate Trailhead modules Requirements can change over time, so always double-check the latest eligibility rules before you register on the official Salesforce exam page.

Yes. Actual4test offers a free DEX-450日本語 PDF demo so you can check the quality of the practice questions before purchasing. After you buy, your product comes with 365 days of free updates, and if it expires you can renew the update service at a 50% discount from your member zone.

Your purchase is protected by our 100% Money Back Guarantee. If you take the corresponding DEX-450日本語 exam within 60 days of purchase and do not pass, send us a scan of your enrollment slip and the official Score Report PDF within two days of the exam, and the full refund will be processed within seven days. The candidate name must match the payer name; exams taken within three days of purchase, free materials, and expired orders are not eligible. If you would rather not refund, you can exchange your product for two free products of equal value and keep the update service on your original purchase. Delivery itself is instant: your material is available for download and is emailed to you within one minute of payment. If nothing arrives within two hours, contact our support team. There is no limit on how many computers you may install it on.

The DEX-450日本語 syllabus is organized into 8 exam domains. Among the first three are Apex Transaction Management (10%), Asynchronous Apex (10%), Apex Fundamentals (10%). For the complete breakdown of topics and subtopics, see the Exam Topics section above.

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

Question #1

開発者チームは、さまざまな組織構成で独立して作業できるソース駆動型プロジェクトに取り組んでいます。
開発にはどのタイプの Salesforce 組織を使用すればよいでしょうか?

  • A. 開発者サンドボックス。
  • B. フルコピーサンドボックス
  • C. 開発者組織
  • D. スクラッチ組織
Answer: D
Question #2

Developer Edition 組織には 5 つの既存のアカウントがあります。開発者は、テスト目的でさらに 10 個のアカウントを追加したいと考えています。
次のコードは、開発者コンソールで [匿名で実行] ウィンドウを使用して実行されます。

このコードが実行された後、組織内のアカウントは合計何個になりますか?

  • A. 6
  • B. 10
  • C. 15
  • D. 5
Answer: B
Question #3

どのステートメントが、「ACME」というフレーズを含むフィールドを持つリードと連絡先のリストを生成しますか?

  • A.
  • B.
  • C.
  • D.
Answer: A

Explanation: Only visible for Actual4test members. You can sign-up / login (it's free).

Question #4

開発者は、更新前イベントでアカウント オブジェクトにトリガーを記述し、カウント フィールドを増分します。レコード トリガー フローも、アカウントが作成または更新されるたびにカウント フィールドを増分します。
アカウントに他の自動化ロジックが実装されていないと仮定して、初期値ゼロでアカウントが挿入された場合、カウント フィールドの値は何ですか?

  • A. 1
  • B. 3
  • C. 2
  • D. 4
Answer: A
Question #5

開発者には、取引先レコードを保存するための Visualforce ページとカスタム コントローラがあります。開発者は、検証ルール違反をユーザーに表示したいと考えています。
開発者は検証ルール違反が表示されるようにするにはどうすればよいでしょうか?

  • A. database.unsert() メソッドを使用して DML を実行します。
  • B. カスタム例外クラスで try/catch を使用します。
  • C. メッセージを表示するためのカスタム コントローラー属性を追加します。
  • D. Visualforce ページに <apex:messages> を含めます。
Answer: D

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