PDF Version DemoShort on study time for the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience exam? Getcertkey condenses your preparation into 202 focused practice questions for the DEX-450 exam, so even a packed schedule leaves room for steady, measurable progress.
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 |
| Real Exam Qty: | 60–85 |
| Exam Price: | $200 USD |
| Passing Score: | 65%–80% |
| Related Certifications: | Salesforce Platform Developer II |
| Exam Duration: | 105–120 |
| Certificate Validity Period: | 3 years |
| Exam Format: | Multiple Select, Multiple Choice, Scenario-based |
| Recommended Training: | Build Applications Programmatically on the Salesforce Platform (DEX450) |
| Exam Registration: | Salesforce Certification Portal |
| Sample Questions: |  |
| 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 |
|---|---|---|
| Apex Classes, Triggers, and Execution | 20% | - Class structure, methods, and access modifiers
|
| Apex Programming Fundamentals | 25% | - Apex syntax, data types, and control structures
|
| Visualforce Development | 15% | - Page creation and standard controllers
|
| Data Retrieval and Manipulation | 20% | - SOQL and SOSL queries
|
| Data Modeling and Management | 20% | - Custom objects, fields, and relationships
|
Common Questions About the Salesforce DEX-450 Exam
What is the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience exam all about?
The DEX-450 exam is the official Salesforce exam behind the Salesforce Platform Developer I certification, validating the skills measured by the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience credential. It sits at the Professional level of the Salesforce certification program. It also connects to Salesforce Platform Developer II, so the knowledge you build here carries over to those tracks as well.
How many questions are on the DEX-450 exam, and how much time do I get?
The DEX-450 exam contains 60–85 questions to be completed within 105–120. Before exam day, divide the available time by the question count to work out a comfortable per-question pace, and mark any item that eats into it so you can return later instead of getting stuck. Timed sessions in the Getcertkey test engines make that pacing automatic — run at least two full-length mock exams under the clock so time pressure never becomes the reason you drop points.
What score do I need to pass the DEX-450 exam, and what does it cost?
The passing score for the DEX-450 exam is 65%–80%, and the official registration fee is $200 USD. Retakes are not discounted — every new attempt means paying the full fee again — so it pays to measure yourself before you book. Work through the 202 practice questions on Getcertkey, sit a timed practice test, and schedule your exam only when your scores are consistently comfortable. That simple habit is the cheapest exam strategy there is.
Are there any prerequisites for the DEX-450 exam?
Understanding of declarative development; experience with object-oriented programming; completion of recommended training or equivalent knowledge Requirements can change when Salesforce revises its certification program, so confirm the current eligibility rules on the official exam page before you register.
How do I register for the DEX-450 exam?
You can book the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience exam through the official registration channels below:
As for delivery, the exam is offered in the following format: Online proctored or onsite testing center. Choose the option that suits you best when you book your seat.
What official training is recommended for the DEX-450 exam?
Salesforce recommends the following training resources for the Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience exam:
Official courses build the foundation; the 202 practice questions from Getcertkey then show you how that knowledge is examined, so the two work best together.
Can I try the DEX-450 practice questions before I buy?
Yes. Getcertkey provides a free DEX-450 PDF demo so you can review the question style and answer quality before purchasing. Every purchase also includes 365 days of free updates — if Salesforce revises the exam during that period, the updated material reaches you at no cost. Once the free-update year ends, you can extend your update service at a 50% discount.
What if I fail the DEX-450 exam, and how is my order delivered?
Every Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience purchase on Getcertkey is covered by a 100% money-back guarantee with clear conditions: if you take the corresponding exam within 60 days of your purchase and do not pass, you can claim a full refund by submitting a scanned copy of your exam enrollment slip and your official score report as a PDF within two days of the exam date; claims are processed within seven days of submission. The guarantee does not apply to exams taken within three days of purchase, to material that was downloaded but never used in an exam attempt, or to free products and expired orders, and the candidate name must match the payer name. If you would rather not take a refund, you can instead exchange your purchase for two free exam preparation products of equal value and keep the update service on your original product.
Delivery is instant: your download is sent to your email within one minute of payment, with no limit on how many computers you may install the material on. If nothing arrives within two hours, check your spam folder and contact customer service for help.
What topics are covered in the DEX-450 exam?
The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience exam blueprint is organized into 5 domains. The first three are:
- Data Modeling and Management — 20% of the exam
- Visualforce Development — 15% of the exam
- Apex Programming Fundamentals — 25% of the exam
For the complete domain-by-domain breakdown, scroll up to the full exam topics outline above and use it to plan how you distribute your study time.
Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Sample Questions:
Question 1
Universal Containers wants Opportunities to no longer be editable when it reaches the Closed/Won stage.
Which two strategies can a developer use to accomplish this?
Choose 2 answers
A. Use a before-save Apex trigger,
B. Use an auto-response rule.
C. Use an automatically launched Approval Process.
D. Use a validation rule.
Question 2
Which code displays the contents of a Visualforce page as a PDF?
A. <apex:page renderAs=''application/pdf''>
B. <apex:page renderAs-wpdf">
C. <apex:page contentType-"pdf">
D. <apex:page contentType-"applic*ticn/pdf''>
Question 3
Universal Containers needs to create a custom user interface component that allows users to enter information about their accounts.
The component should be able to validate the user input before saving the information to the database.
What is the best technology to create this component?
A. Flow
B. Lightning Web Components
C. Visualforce
D. VUE JavaScript framework
Question 4
A developer created a new after insert trigger on the Lead object that creates Task records for each Lead.
After deploying to production, an existing outside integration that inserts Lead records in batches to Salesforce is occasionally reporting total batch failures being caused by the Task insert statement. This causes the integration process in the outside system to stop, requiring a manual restart.
Which change should the developer make to allow the integration to continue when some records in a batch cause failures due to the Task insert statement, so that manual restarts are not needed?
A. Use a try-catch block after the insert statement.
B. Remove the Apex class from the integration user's profile.
C. Deactivate the trigger before the integration runs.
D. Use the Database method with allow one set to false.
Question 5
The orderHelper class is a utility class that contains business logic for processing orders. Consider the following code snippet:
A developer needs to create a constant named delivery_multiplier with a value of 4.15. The value of the constant should not change at any time in the code.
How should the developer declare the delivery multiplier constant to meet the business objectives?
A. decimal DELIVERY_MULTIPLIER = 4.15;
B. static final decimal DELIVERY_MULTIPLIER = 4.15;
C. constant decimal DELIVERY_MULTIPLIER = 4.15;
D. static decimal DELIVERY_MULTIPLIER = 4.15;
Solutions:
| Question 1 Answer: A,D | Question 2 Answer: B | Question 3 Answer: B | Question 4 Answer: D | Question 5 Answer: B |
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