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Salesforce DEX-450 Exam Questions

Exam Name: Build Applications Programmatically on the Salesforce Platform
Exam Code: DEX-450
Related Certification(s): Salesforce Platform Developer I Certification
Certification Provider: Salesforce
Number of DEX-450 practice questions in our database: 174 (updated: Dec. 11, 2024)
Expected DEX-450 Exam Topics, as suggested by Salesforce :
  • Topic 1: Describe how triggers fit into and can be impacted by the Order of Execution/ Building a Data Model on the Salesforce Platform
  • Topic 2: Referencing Custom Controllers and Controller Extensions/ Use the sObject data type, the primitive data types, and basic control statements in Apex
  • Topic 3: Process the result of a query in Apex/ Understanding Record Types/ Use trigger context variables
  • Topic 4: Describe strategies for Testing Visualforce controllers/ Use SOQL to Query Parent-Child Relationships
  • Topic 5: Write a query that traverses a child-to-parent and parent-to-child relationship/ Creating Roll-Up Summary Fields
  • Topic 6: Write a basic query using Salesforce’s query language, SOQL/ Write Apex to invoke DML operations and handle DML errors
  • Topic 7: Write tests for action methods, getters, setters, and properties/ List the differences between the ways you can invoke DML operations
  • Topic 8: Describe the syntax of a trigger definition/ Display data from a record in a Visualforce page
  • Topic 9: Describe common limit issues and security concerns/ Launch a Visualforce page using a custom button
  • Topic 10: Visualforce Development Considerations and Testing/ Determine what data an Apex class can access
  • Topic 11: Describe the memory lifecycle for static attributes/ Use Platform Events for Immediate Error Logging
  • Topic 12: Describe practices for writing code that is easy to maintain and extend/ Write triggers and classes that assume batches of data as input
Disscuss Salesforce DEX-450 Topics, Questions or Ask Anything Related

Arlette

2 days ago
Cleared the Salesforce exam, and Pass4Success practice questions were invaluable. One question that stumped me was about Apex Class Essentials. It asked how to use access modifiers to control visibility. I wasn't entirely sure, but I got through.
upvoted 0 times
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Reita

3 days ago
Passed my Salesforce exam with flying colors! Couldn't have done it without Pass4Success's relevant practice material.
upvoted 0 times
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Deane

18 days ago
I passed the Salesforce exam, and Pass4Success was a big help. A question that threw me off was about Visualforce Development Considerations. It asked how to optimize Visualforce pages for performance. I wasn't sure of the best practices, but I managed to pass.
upvoted 0 times
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Mary

1 months ago
Salesforce cert in the bag! Pass4Success's exam questions were a lifesaver for last-minute prep.
upvoted 0 times
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Tesha

1 months ago
Successfully passed the Salesforce exam, thanks to Pass4Success. One challenging question was about Apex Testing. It asked how to create test data and ensure 100% code coverage. I was a bit unsure, but I still passed.
upvoted 0 times
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Jamika

2 months ago
I aced the Salesforce exam, and Pass4Success practice questions were a lifesaver. There was a question about Lightning Components that puzzled me. It asked how to use Lightning Data Service to load, create, and edit records. I wasn't entirely confident, but I made it through.
upvoted 0 times
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Georgeanna

2 months ago
Passed the Salesforce exam with flying colors, and Pass4Success was instrumental. One question that caught me off guard was about declarative automation. It asked how to use Process Builder to automate a business process without writing code. I wasn't 100% sure, but I still managed to pass.
upvoted 0 times
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Tijuana

2 months ago
Wow, aced the Salesforce exam! Pass4Success really helped me prepare quickly and efficiently.
upvoted 0 times
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Edward

3 months ago
Just cleared the Salesforce exam, thanks to Pass4Success! There was a tricky question on Apex Transactions. It asked how to handle partial success in a transaction using savepoints and rollbacks. I had to think hard about it, but I got through.
upvoted 0 times
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Ailene

3 months ago
The exam tested knowledge of Apex Interfaces and virtual classes. Understand how to use them for creating flexible, extensible code.
upvoted 0 times
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Justine

3 months ago
I recently passed the Salesforce Build Applications Programmatically exam, and the Pass4Success practice questions were a huge help. One question that stumped me was about the order of execution in Salesforce. Specifically, it asked about the sequence of triggers, workflows, and validation rules. I wasn't entirely sure of the exact order, but I managed to pass the exam.
upvoted 0 times
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Annette

3 months ago
Just passed the Salesforce Certified: Build Applications Programmatically exam! Thanks Pass4Success for the spot-on practice questions!
upvoted 0 times
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Avery

4 months ago
Passing the Salesforce Build Applications Programmatically on the Salesforce Platform exam was a great achievement for me, and I attribute my success to the practice questions provided by Pass4Success. The exam covered important topics such as building a Data Model on the Salesforce Platform and using basic control statements in Apex. One question that I remember struggling with was related to using the sObject data type in Apex. Despite my uncertainty, I was able to pass the exam.
upvoted 0 times
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Katie

5 months ago
My exam experience was successful as I passed the Salesforce Build Applications Programmatically on the Salesforce Platform exam with the assistance of Pass4Success practice questions. The exam included topics like referencing Custom Controllers and Controller Extensions, as well as using the sObject data type and basic control statements in Apex. One question that I found challenging was about using primitive data types in Apex. Even though I had some doubts, I managed to pass the exam.
upvoted 0 times
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Nichelle

5 months ago
Just passed the Salesforce Certified: Build Applications Programmatically exam! Watch out for questions on Apex triggers and their execution context. Know when to use before/after triggers and understand governor limits. Thanks to Pass4Success for the spot-on practice questions that helped me prep quickly. Remember to study LWC lifecycle hooks and how to handle events in Lightning Web Components. Also, be ready for scenarios involving integration patterns and callouts to external systems. Good luck!
upvoted 0 times
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Corazon

6 months ago
Just passed the Salesforce Certified: Build Applications Programmatically exam! Be prepared for questions on Apex triggers and their execution context. Study the order of execution and how triggers interact with other automation tools. Thanks to Pass4Success for the spot-on practice questions that helped me prepare quickly!
upvoted 0 times
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Polly

6 months ago
I recently passed the Salesforce Build Applications Programmatically on the Salesforce Platform exam with the help of Pass4Success practice questions. The exam covered topics such as triggers and Order of Execution, as well as building a Data Model on the Salesforce Platform. One question that stood out to me was related to how triggers can be impacted by the Order of Execution. Despite being unsure of the answer, I was able to pass the exam.
upvoted 0 times
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Delsie

6 months ago
Alex Johnson
upvoted 0 times
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Free Salesforce DEX-450 Exam Actual Questions

Note: Premium Questions for DEX-450 were last updated On Dec. 11, 2024 (see below)

Question #1

How can a developer check the test coverage of autolaunched Flows before deploying them in a change set?

Reveal Solution Hide Solution
Correct Answer: A

As of Winter '20 (API version 47.0), Salesforce introduced the ability to test Autolaunched Flows with test coverage.

However, as of the current knowledge cutoff (2023-09), there is no direct way within the Salesforce UI to check the test coverage of autolaunched flows before deploying them via change sets.

To check the test coverage of flows, developers can use the Tooling API to query for test coverage.

Option A: Use SOQL and the Tooling API.

Correct Answer.

Developers can use the Tooling API to query for Flow test coverage information.

By executing a SOQL query on FlowTestCoverage and FlowVersionView objects via the Tooling API, developers can retrieve coverage data.

This allows checking flow test coverage programmatically before deployment.

The Flow Properties page does not provide test coverage information.

It allows configuring flow settings but not checking test coverage.

Option C: Use the Code Coverage Setup page.

Incorrect.

The Code Coverage page in Setup pertains to Apex code coverage, not Flow coverage.

Option D: Use the ApexTestResult class.

Incorrect.

The ApexTestResult class is used for Apex test results.

It does not provide information on Flow test coverage.

Conclusion:

To check the test coverage of autolaunched Flows before deploying them in a change set, a developer should use SOQL and the Tooling API, which is Option A.


Flow Test Coverage with Tooling API

Use Tooling API to Check Flow Coverage

Incorrect Options:

Option B: Use the Flow Properties page.

Incorrect.

Question #2

A developer needs to have records with specific field values in order to test a new Apex class.

What should the developer do to ensure the data is available to the test?

Reveal Solution Hide Solution
Correct Answer: B

To ensure that specific data is available in test methods, the developer should create test data within the test context.

Option B: Use Test.loadData() and reference a CSV file in a static resource.

Correct Approach.

Test.loadData() is a method that allows test methods to load test data from a CSV file stored as a static resource.

This method creates the records in the test context, ensuring that the data is available during the test execution.

Using a CSV file makes it easy to define multiple records with specific field values.

Usage Example:

@isTest

private class MyTestClass {

@isTest

static void testMethod() {

List<MyObject__c> testRecords = (List<MyObject__c>) Test.loadData(MyObject__c.sObjectType, 'MyTestData');

// Proceed with testing using testRecords

}

}

Where 'MyTestData' is the name of the static resource containing the CSV file.

Test.loadData() does not support loading data from JSON files or from the Documents object.

It uses CSV files stored as static resources.

Option C: Use Anonymous Apex to create the required data.

Not Effective for Testing.

Data created via Anonymous Apex is not available in test methods due to data isolation.

Test methods operate in their own context and cannot access data created outside the test unless SeeAllData=true is used, which is discouraged.

Option D: Use SOQL to query the org for the required data.

Not Recommended.

Test methods should not rely on existing org data.

Tests should create their own data to ensure consistency and avoid dependencies.

Using SeeAllData=true is discouraged.

Conclusion:

To ensure that records with specific field values are available in the test, the developer should use Test.loadData() with a CSV file stored in a static resource.

Therefore, Option B is the correct answer.


Test.loadData() Method

Static Resources

Options Not Suitable:

Option A: Use test.loadData() and reference a JSON file in Documents.

Incorrect.

Question #3

A credit card company needs to implement the functionality for a service agent to process damaged or stolen credit cards. When the customers call in, the service agent must gather many pieces of information. A developer is tasked to implement this functionality.

What should the developer use to satisfy this requirement in the most efficient manner?

Reveal Solution Hide Solution
Correct Answer: A

The requirement is for service agents to gather many pieces of information when processing damaged or stolen credit cards.

Option A: Screen-based Flow

Correct Answer.

A Screen Flow allows developers to build guided, interactive forms that collect information from users.

Flows can have multiple screens, validation rules, and branching logic.

They can be created declaratively without code, making them efficient to implement.

Benefits:

Efficient Development: No need for code.

User-Friendly: Provides a step-by-step interface.

Maintainable: Easy to update as requirements change.

Building a custom Lightning Component requires development effort.

For simple data collection, a Flow is more efficient.

Option C: Approval Process

Incorrect.

Approval Processes are used for routing records for approval, not for gathering information from users.

Option D: Apex Trigger

Incorrect.

Triggers run in the background and are not used for interactive user interfaces.

Conclusion:

The most efficient way to satisfy the requirement is to use a Screen-based Flow, which is Option A.


Build a Flow

Screen Flows

Incorrect Options:

Option B: Lightning Component

*Possible but Less Efficient.

Question #4

Which code displays the contents of a Visualforce page as a PDF?

Reveal Solution Hide Solution
Correct Answer: C

Question #5

Which statement generates a list of Leads and Contacts that have a field with the phrase 'ACME'?

Reveal Solution Hide Solution
Correct Answer: B


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