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Updated: Aug 07, 2026

No. of Questions: 202 Questions & Answers with Testing Engine

Download Limit: Unlimited

Choosing Purchase: "Online Test Engine"
Price: $69.00 

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DEX-450 Practice Q&A's

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Salesforce DEX-450 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%
Exam Format:Multiple Choice, Multiple Select
Available Languages:English
Related Certifications:Platform Developer II (PDII)
Salesforce Certified Administrator
Exam Price:$200 USD
Exam Duration:120 minutes
Certificate Validity Period:2 years (for certification)
Sample Questions:Salesforce DEX-450 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

How to Study the Salesforce DEX-450 Exam

The DEX-450 Test can be prepared in several respects. There are many forms to train for this test. Aspirants can select the PDFs available on the official website of Salesforce and they are also able to view videos online. The Qualification Questions Team strongly maintains that information obtained from multiple testing materials and references must be tested using high-quality evaluation engines when they fulfil the actual test. Before being greenlit, all our study material is confirmed repeatedly by experts.DEX-450 exam dumps of qualification-questions will be continuously revised, so the DEX-450 Test will be mirrored into the Dex-450 practice exams of any changes to the Salesforce Agile Research Certification materials. Expert team on TopExamCollection advises that you take quality notes on these subjects and that you should not neglect to follow DEX-450 exam dumps, which has been written by our expert staff.

Benefits in Obtaining Salesforce DEX-450 Certification

71 percent of bachelor's degree expert methodology and energetic methodology certified methodologists receive up to another 16 percent are recorded in the Salesforce annual analytical compensation survey. The certification from Salesforce DEX-450 strengthens your expertise as well as your know-how to ensure that your views are agile in a system of market research. The physical test applicants of the Salesforce DEX-450 certification perceive a fresh advantage on other comrades when being interviewed. In the project market, aspirants find themselves even more aggressive. Salesforce DEX-450 is understood worldwide so that certified aspirants, along with methods of organizational analysis, are simply more self-confident.

The DEX-450 qualification from Salesforce enhances your expertising and expertise to apply an agile perspective within a system of corporate research. At the interview DEX-450 examiners pick a corner over other comrades. In the labour market, aspirants are more competitive.

Reference: https://trailhead.salesforce.com/en/academy/classes/dex450-build-applications-programmatically-on-the-salesforce-platform/

For more info read reference:

Salesforce DEX-450 Certification leaning site Salesforce DEX-450 Certification resources

Salesforce DEX-450 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Working with Data - SOQL and SOSL15%- SOQL (Salesforce Object Query Language)
  • 1. Relationship queries (parent-child, child-parent)
  • 2. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
  • 3. Query options (LIMIT, ORDER BY, WHERE)
  • 4. Basic SOQL queries
- SOSL (Salesforce Object Search Language)
  • 1. SOSL syntax and use cases
  • 2. Returning sObjects from SOSL
Topic 2: Apex Classes and Interfaces12%- Apex Classes
  • 1. Inheritance and virtual/abstract classes
  • 2. Class structure (attributes, methods, constructors)
  • 3. Access modifiers (public, private, protected, global)
- Apex Interfaces
  • 1. When to use interfaces
  • 2. Interface definition and implementation
Topic 3: Visualforce Pages8%- VF Page Basics
  • 1. Visualforce expressions
  • 2. Controllers and controller extensions
  • 3. component structure
- VF Standard Components
  • 1. Action methods and pageReference
  • 2. , ,
  • 3. ,
Topic 4: Apex Transaction Management10%- Governor Limits
  • 1. CPU time and heap size limits
  • 2. DML statement limits
  • 3. SOQL query limits
- Transaction Control
  • 1. Savepoint and rollback
  • 2. Database methods with allOrNone parameter
  • 3. System.debug() usage
Topic 5: Asynchronous Apex10%- Batch Apex
  • 1. Database.Stateful
  • 2. start(), execute(), and finish() methods
  • 3. Database.Batchable interface
- Future Methods
  • 1. @future annotation
  • 2. AsyncRequestLimit exceeded handling
Topic 6: 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. Recursive trigger prevention
  • 2. Handler class patterns
  • 3. One trigger per object pattern
Topic 7: Apex Testing13%- Test Classes
  • 1. Test.startTest() and Test.stopTest()
  • 2. @isTest annotation
  • 3. Test data creation methods
- Testing Best Practices
  • 1. Assert statement usage
  • 2. Using seeAllData=false for isolated tests
  • 3. Coverage requirements (75% for deployment)
Topic 8: Apex Fundamentals10%- Apex Basics
  • 1. Apex operators and control flow statements
  • 2. Apex variables and data types
  • 3. Using SOQL to query Salesforce data
  • 4. DML operations (insert, update, delete, etc.)
- Apex Primitives
  • 1. Date, Datetime, Time classes
  • 2. Integer, Double, Long, String, Boolean types
  • 3. ID and sObject types

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Frequently Asked Questions

What kinds of study material TopExamCollection provides?

Test Engine: DEX-450 study test engine can be downloaded and run on your own devices. Practice the test on the interactive & simulated environment.
PDF (duplicate of the test engine): the contents are the same as the test engine, support printing.

How long can I get the DEX-450 products after purchase?

You will receive an email attached with the DEX-450 study material within 5-10 minutes, and then you can instantly download it for study. If you do not get the study material after purchase, please contact us with email immediately.

How does your Testing Engine works?

Once download and installed on your PC, you can practice DEX-450 test questions, review your questions & answers using two different options' practice exam' and 'virtual exam'.
Virtual Exam - test yourself with exam questions with a time limit.
Practice Exam - review exam questions one by one, see correct answers.

Can I get the updated DEX-450 study material and how to get?

Yes, you will enjoy one year free update after purchase. If there is any update, our system will automatically send the updated study material to your payment email.

What's the applicable operating system of the DEX-450 test engine?

Online Test Engine can supports Windows / Mac / Android / iOS, etc., because it is the software based on WEB browser. You can use it on any electronic device and practice with self-paced.
Online Test Engine supports offline practice, while the precondition is that you should run it with the internet at the first time.
Self Test Engine is suitable for windows operating system, running on the Java environment, and can install on multiple computers.
PDF Version: can be read under the Adobe reader, or many other free readers, including OpenOffice, Foxit Reader and Google Docs.

How often do you release your DEX-450 products updates?

All the products are updated frequently but not on a fixed date. Our professional team pays a great attention to the exam updates and they always upgrade the content accordingly.

Do you have money back policy? How can I get refund if fail?

Yes. We have the money back guarantee in case of failure by our products. The process of money back is very simple: you just need to show us your failure score report within 60 days from the date of purchase of the exam. We will then verify the authenticity of documents submitted and arrange the refund after receiving the email and confirmation process. The money will be back to your payment account within 7 days.

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