Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developer
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Instant Download Salesforce : DEX-450 Questions & Answers as PDF & Test Engine
Updated: Oct 10, 2026
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- Total Questions: 202
- Updated on: Oct 10, 2026
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Most Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience candidates are working IT professionals — people who can't sit in scheduled training classes. TestKingFree was built for them: DEX-450 practice questions in self-paced formats that fit around a job, not the other way around.
Salesforce DEX-450 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Programmatic Development using Apex and Visualforce in Lightning Experience |
| Exam Number: | DEX-450 |
| Related Certifications: | Salesforce Platform Developer II |
| Passing Score: | 65%–80% |
| Certificate Validity Period: | 3 years |
| Exam Format: | Multiple Select, Scenario-based, Multiple Choice |
| Exam Price: | $200 USD |
| Exam Duration: | 105–120 |
| Available Languages: | English |
| Real Exam Qty: | 60–85 |
| 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 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Apex Programming Fundamentals | 25% | - Apex syntax, data types, and control structures
|
| Topic 2: Data Modeling and Management | 20% | - Custom objects, fields, and relationships
|
| Topic 3: Apex Classes, Triggers, and Execution | 20% | - Class structure, methods, and access modifiers
|
| Topic 4: Visualforce Development | 15% | - Page creation and standard controllers
|
| Topic 5: Data Retrieval and Manipulation | 20% | - SOQL and SOSL queries
|
Everything About the Salesforce DEX-450 Exam in One FAQ
Delivery takes seconds to minutes: payment clears, download links go live, and an email copy arrives almost immediately — install on as many computers as you need, and contact support if 2 hours pass with nothing. For the what-if: take the corresponding DEX-450 exam within 60 days of purchase, and if you fail, apply for a full refund by submitting a scanned enrollment slip and your official Score Report PDF within 2 days of the exam — we process it within 7 days. Conditions: exams taken within 3 days of purchase don't qualify, the candidate's name must match the payer's, and free or expired products are excluded. Or exchange for two equal-value exam products free and keep the updates.
Through the vendor's official registration channels:
The exam runs Online proctored or onsite testing center, so pick the setup that suits you when booking.
The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience is the official Salesforce exam behind the Salesforce Platform Developer I certification at the Professional level. It's how the vendor verifies that your skills meet its standard — and how employers know they do. Related credentials include Salesforce Platform Developer II, useful context if you're mapping a longer certification path.
60–85 questions, 105–120 on the clock. That ratio is the real exam-within-the-exam: budget your time per question, learn to flag and move on, and rehearse in the TestKingFree engine under real timing until finishing comfortably becomes your default.
The vendor recommends the following:
No time for scheduled classes? You're not alone — most of our customers are working IT professionals. The DEX-450 practice questions from TestKingFree deliver the self-paced alternative, ready whenever your calendar is.
The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience blueprint divides into 5 domains, with Data Retrieval and Manipulation (20%), Data Modeling and Management (20%), Apex Classes, Triggers, and Execution (20%) among the headline areas. Let the weightings steer your hours — they tell you where the questions concentrate. The full outline above shows every subtopic.
Registration costs $200 USD, and passing requires 65%–80%. Credit card is the standard, secure way to pay — and note the fee applies per attempt, so a retake costs full price again. Practicing with the 202 questions from TestKingFree until your mock scores clear the bar comfortably is the cheaper insurance.
Understanding of declarative development; experience with object-oriented programming; completion of recommended training or equivalent knowledge Vendor policies evolve, so before booking, confirm the latest eligibility details on the official exam page (official DEX-450 exam information).
Yes — never bought from us before? Download the free PDF demo first and see the quality directly. Purchases include 365 days of free updates, with the latest version sent to you automatically whenever it releases; expired update periods renew at 50% off.
Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Sample Questions:
In the following example, which sharing context will myMethod execute when it is invoked?
- A. Sharing rules will be inherited from the calling context.
- B. Sharing rules will not be enforced for the running user.
- C. Sharing rules will be enforced by the instantiating class.
- D. Sharing rules will be enforced for the running user.
Correct Answer: A 🗳️
Which code statement includes an Apex method named updateAccounts in the class AccountController for use in a Lightning web component?
- A. import updateAccounts from "@salesforce/apex/AccountController.updateAccounts";
- B. import updateAccounts from "Salesforce/apex/AccountController:';
- C. import updateAccounts from "AccountControlles';
- D. import updateAccounts from "[email protected]';
Correct Answer: B 🗳️
A developer must perform a complex SOQL query that joins two objects in a Lightning component.
How can the Lightning component execute the query?
- A. Invoke an Apex class with the method annotated as @AuraEnabled to perform the query.
- B. Write the query in a custom Lightning web component wrapper and invoke from the Lightning component.
- C. Create a flow to execute the query end invoke from the Lightning component.
- D. Use the Salesforce Streaming APL to perform the SOQL query.
Correct Answer: B 🗳️
Universal Containers wants to back up all of the data and attachments in its Salesforce org once a month.
Which approach should a developer use to meet this requirement?
- A. Use the Data Loader command line.
- B. Define a Data Export scheduled job.
- C. Schedule a report.
- D. Create a Schedulable Apex class.
Correct Answer: B 🗳️
A developer is creating an app that contains multiple Lightning web components.
One of the child components is used for navigation purposes. When a user clicks a button called Next in the child component, the parent component must be alerted so it can navigate to the next page.
How should this be accomplished?
- A. Call a method in the Apex controller.
- B. Create a custom event.
- C. Update a property on the parent.
- D. Fire a notification.
Correct Answer: B 🗳️
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