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Salesforce DEX-450 : Programmatic Development using Apex and Visualforce in Lightning Experience
- Exam Code: DEX-450
- Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
- Updated: Sep 22, 2026
- Q & A: 202 Questions and Answers
About Salesforce DEX-450 Exam
Concise, clear, easy to read and remember — download the free Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience demo as your reference, then get the full 202 practice questions for the DEX-450 exam at VCETorrent.
Salesforce DEX-450 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Programmatic Development using Apex and Visualforce in Lightning Experience |
| Exam Number: | DEX-450 |
| Available Languages: | English |
| Exam Format: | Multiple choice questions (typical Salesforce training exams), Course assessment (format varies by provider) |
| Related Certifications: | Salesforce Platform Developer II Salesforce Platform Developer I |
| Recommended Training: | Salesforce Apex Developer Guide Salesforce Visualforce Developer Guide |
| Exam Registration: | Salesforce Trailhead Training |
| Sample Questions: |  |
| Exam Way: | Instructor-led training assessment or course completion exam (varies by training provider) |
| Pre Condition: | Basic understanding of object-oriented programming and database concepts is recommended. Prior Salesforce experience is helpful but not strictly required. |
| Official Syllabus URL: | https://trailhead.salesforce.com |
Salesforce DEX-450 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Visualforce Development | - UI components
|
| Topic 2: Testing and Debugging | - Debugging techniques
|
| Topic 3: Apex Triggers and Automation | - Order of execution
|
| Topic 4: Database and SOQL/SOSL | - SOQL queries
|
| Topic 5: Security and Best Practices | - Security model
|
| Topic 6: Apex Programming Fundamentals | - Apex syntax and object-oriented concepts
|
Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam FAQ — Irresistible Answers
Basic understanding of object-oriented programming and database concepts is recommended. Prior Salesforce experience is helpful but not strictly required. Eligibility rules change over time, so verify the current requirements on the official page (official DEX-450 exam page) before registering.
The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience is Salesforce's certification exam for Salesforce Programmatic Development using Apex and Visualforce (Training Course). Related credentials include Salesforce Platform Developer I, Salesforce Platform Developer II. Start simply: free demo first, full set when convinced.
Yes:
After any course, reinforce it with the 202 practice questions for the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience — every answer expert-verified.
Yes — download our demo freely as your reference; you may be impressed by the conciseness and clearness of the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience exam VCE. Purchases include 365 days of free updates by email; renew afterward at 50% off.
The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience blueprint spans 6 domains — including Testing and Debugging, Security and Best Practices, Database and SOQL/SOSL. Our material keeps close to this syllabus; the complete outline above lists every subtopic.
Checkout is brief: add your chosen Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience version to cart, check your email address, apply a discount code if you have one, pay by credit card — the system emails the product automatically within about a minute, with 24/7 help if nothing arrives within 2 hours. All operations are safe and secure. If you fail the corresponding DEX-450 exam within 60 days of purchase, we refund in full: send a scanned enrollment slip plus the official Score Report PDF within 2 days of the exam, processed within 7 days. Excluded: exams within 3 days of purchase, candidate names that don't match the payer, and free or expired products. Or exchange for two equal-value products free.
Through the vendor's official registration channels:
The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience is delivered Instructor-led training assessment or course completion exam (varies by training provider) — pick the arrangement that suits you when booking.
Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Sample Questions:
Question #1
A lead developer creates an Apex interface called Laptop. Consider the following code snippet:
public class SilverLaptop{
//code implementation
How can a developer use the Laptop interface within the silverLaptop class?
- A.
- B.
- C.
- D.
Correct Answer: C 🗳️
Question #2
Since Aura application events follow the traditional publish-subscribe model, which method is used to fire an event?
- A. SegdetesEvent (}
- B. fire()
- C. FireEvent()
- D. emit()
Correct Answer: B 🗳️
Question #3
Developers at Universal Containers (UC) use version control to share their code changes, but they notice that when they deploy their code to different environments they often have failures. They decide to set up Continuous Integration (CI).
What should the UC development team use to automatically run tests as part of their CI process?
- A. Developer Console
- B. Visual Studio Code
- C. Salesforce CLI
- D. Force.com Toolkit
Correct Answer: C 🗳️
Question #4
While working in a sandbox, an Apex test fails when run in the Test Runner. However, executing the Apex logic in the Execute Anonymous window succeeds with no exceptions or errors.
Why did the method fail in the sandbox test framework but succeed in the Developer Console?
- A. The test method relies on existing data in the sandbox.
- B. The test method has a syntax error in the code.
- C. The test method is calling an @future method.
- D. The test method does not use system. runAs to execute as a specific user.
Correct Answer: A 🗳️
Question #5
A developer wants to get access to the standard price book in the org while writing a test class that covers an OpportunityLineltem trigger.
Which method allows access to the price book?
- A. Use Test .getStandardPricebookid() to get the standard price book ID.
- B. Use @Testvisible to allow the test method to see the standard price book.
- C. Use @isTest [SeeAllData=true| and delete the existing standard price book.
- D. Use Test. loadData () and a static resource to load a standard price book.
Correct Answer: A 🗳️
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