Failing the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam means paying the registration fee all over again. A set of 202 updated DEX-450日本語 practice questions from Dumpkiller costs far less than a retake — a smart investment for 2026 candidates.
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: | 60–85 |
| Passing Score: | 65%–80% |
| Exam Duration: | 105–120 |
| Exam Format: | Scenario-based, Multiple Select, Multiple Choice |
| Certificate Validity Period: | 3 years |
| Exam Price: | $200 USD |
| Related Certifications: | Salesforce Platform Developer II |
| Available Languages: | English |
| Recommended Training: | Build Applications Programmatically on the Salesforce Platform (DEX450) |
| Exam Registration: | Salesforce Certification Portal |
| Sample Questions: | DOWNLOAD DEMO |
| Exam Way: | Online proctored or onsite testing center |
| Pre Condition: | Understanding of declarative development; experience with object-oriented programming; completion of recommended training or equivalent knowledge |
| Official Syllabus URL: | https://trailhead.salesforce.com/en/credentials/platform-developer-i |
Salesforce DEX-450日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Data Modeling and Management | 20% | - Custom objects, fields, and relationships
|
| Apex Classes, Triggers, and Execution | 20% | - Class structure, methods, and access modifiers
|
| Apex Programming Fundamentals | 25% | - Apex syntax, data types, and control structures
|
| Data Retrieval and Manipulation | 20% | - SOQL and SOSL queries
|
| Visualforce Development | 15% | - Page creation and standard controllers
|
What Candidates Ask About the Salesforce DEX-450日本語 Exam
Can you give me an overview of the DEX-450日本語 exam?
The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam (code: DEX-450日本語) is the official Salesforce exam that leads to the Salesforce Platform Developer I certification. It sits at the Professional level of the Salesforce certification track. It is also connected with related credentials such as Salesforce Platform Developer II. Passing it proves to employers that your skills have been validated by Salesforce itself, which is why the DEX-450日本語 credential keeps showing up in job postings.
How many questions are in the DEX-450日本語 exam, and how long does it take?
The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam gives you 105–120 to work through 60–85. Pacing matters more than most candidates expect, so before exam day, run at least one full timed session in the Dumpkiller test engine to learn how long you can afford per question. If an item stalls you, flag it and move on — coming back later beats burning five minutes on a single question.
What score do I need to pass the DEX-450日本語 exam, and how much does it cost?
The passing score for the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam is 65%–80%, and the official registration fee is $200 USD. Remember that a failed attempt means paying that fee in full again, so a timed self-assessment with Dumpkiller practice questions about a week before your exam date is a cheap way to confirm you are scoring comfortably above 65%–80%.
Are there any prerequisites for the DEX-450日本語 exam?
According to Salesforce, the following applies: Understanding of declarative development; experience with object-oriented programming; completion of recommended training or equivalent knowledge. Certification policies do change from time to time, so confirm the latest requirements on the official exam page at https://trailhead.salesforce.com/en/credentials/platform-developer-i before you register.
How do I register for the DEX-450日本語 exam?
You can book your Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) exam through the official channels below:
Depending on availability in your region, the exam is delivered as Online proctored or onsite testing center.
What official training does Salesforce recommend for the DEX-450日本語 exam?
Salesforce lists the following training options for Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) candidates:
Official courses build a solid foundation, and pairing them with the 202 practice questions from Dumpkiller shows you how ready you really are before you spend money on the exam itself.
Can I try the DEX-450日本語 practice questions before buying?
Yes. Dumpkiller offers a free DEX-450日本語 PDF demo so you can review the question style, difficulty, and explanations before committing to anything. After purchase, your Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) material includes 365 days of free updates, and if your product expires after that, you can extend the update service at a 50% discount from your member zone.
What happens if I do not pass the DEX-450日本語 exam, and how is my order delivered?
If you take the corresponding DEX-450日本語 exam within 60 days of your purchase and do not pass, you can apply for a full refund under our 100% Money Back Guarantee, subject to a few conditions: the failed exam must be the one matching your purchase; sitting the exam within 3 days of purchase does not qualify, since that leaves too little preparation time; downloading the material without actually taking the exam does not qualify; free materials and expired orders are excluded; and the candidate name must match the payer name. To apply, send a scanned copy of your enrollment slip together with your official Score Report (PDF) within 2 days after the exam, and claims are processed within 7 days. If you would rather not take a refund, you can exchange your purchase for two free products of equal value while keeping the update service on the product you originally bought. As for delivery, everything is an instant download: your products are sent to your email within one minute of payment — contact customer service if nothing arrives within 2 hours — and there is no limit on the number of computers you can install the software on.
What topics are covered in the DEX-450日本語 exam?
The official Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) syllabus is organized into 5 main domains. The first three are Data Modeling and Management (20%), Apex Programming Fundamentals (25%), and Apex Classes, Triggers, and Execution (20%). For the full domain-by-domain breakdown, see the complete Exam Topics outline above.
Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) Sample Questions:
Question #1
Universal Containers では、ユーザーが複数のレコードを編集できるようにする Visualforce ページを表示するリスト ボタンが必要です。
この要件をサポートする Visualforce 機能はどれですか?
A. カスタム リスト コントローラー拡張を備えた標準コントローラー
B. recorasetvar ページ属性を持つカスタム リスト コントローラ
C. 標準コントローラと recordsetvar ページ属性
D. コントローラ拡張と <spex:listButton> タグ
Question #2
カスタム オブジェクトに、カスタム選択リスト フィールド Pool Preference が存在します。選択リストには、「Vegan」、「Kosher」、「No Preference」のオプションが含まれています。開発者は、レコードが作成または更新されるたびに値が入力されるようにする必要があります。
レコードが保存されるたびに値が選択されるようにする最適な方法は何ですか?
A. 「リストの最初の値をデフォルト値として使用する」を True に設定します。
B. オブジェクトのページレイアウトでフィールドを必須としてマークします。
C. フィールド定義でフィールドを必須としてマークします。
D. 値が選択されたことを確認するためのApexトリガーを記述します。
Question #3
Candidate _c カスタム オブジェクトには Primaryld_c カスタム フィールドが存在します。このフィールドは各候補者の ID 番号を保存するために使用され、スキーマ定義では Unique としてマークされています。
データ拡充プロセスの一環として、Universal Containers には、システム内のすべての候補者の更新されたデータを含む CSV ファイルがあります。ファイルには、各候補者の主な情報がデータ ポイントとして含まれています。Universal Containers は、すべてのデータ行がシステム内の候補者に正しくマッピングされていることを確認しながら、この情報を Salesforce にアップロードしたいと考えています。
データのアップロードを効率化するために、開発者はどの手法を実装する必要がありますか?
A. CSV を candidate__c に関連するカスタム オブジェクトにアップロードします。
B. レコードを正しくマッピングするために、保存前のフローを作成します。
C. Primarytd_c フィールド定義を更新して、外部 ID としてマークします。
D. レコードを正しくマッピングするために挿入前トリガーを作成します。
Question #4
次の Apex コードを参照してください。
デバッグ ログに書き込まれるときの x の値は何ですか?
A. 1
B. 2
C. 0
D. 4
Question #5
ある会社のエンジニアリング部門では、100 台以上のサーバーのクラスターを必要とする社内開発ソフトウェアのスケーラビリティについて 1 か月間のテストを実施しています。次のモデルのうち、どのモデルを使用するのが最適ですか。
A. PaaS
B. BaaS
C. aaS
D. SaaS
Solutions:
| Question #1 Answer: C | Question #2 Answer: A | Question #3 Answer: C | Question #4 Answer: B | Question #5 Answer: C |


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