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Guide for DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform

Quiz DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform

Updated on 2026/09/23

PDF|

Guide for DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform

Updated on 2026/09/23

Randomized | 10 Questions per Test | 20 Minutes | 70% to pass

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Quiz

Question 1/101/10

A company's engineering department is conducting a month-long test on the scalability of an in-
house-developed software that requires a cluster of 100 or more servers. Which of the following
models is the best to use?

Select the answer:Select the answer

1 correct answer

PaaS

SaaS

BaaS

laaS

Quiz

Question 2/102/10

What are three characteristics of change set deployments?
Choose 3 answers Sending a change set between two orgs requires a deployment connection.

Select multiple answer: (Choose 3)Select the answer

3 correct answers

Change sets can deploy custom settings data.

Change sets can only be used between related organizations.

Deployment is done in a one-way, single transaction.

Sending a change set between two orgs requires a deployment connection.

Change sets can be used to transfer records.

Quiz

Question 3/103/10

Universal Containers wants to ensure that all new leads created in the system have a valid email
address. They have already created a validation rule to enforce this requirement, but want to add an
additional layer of validation using automation.
What would be the best solution for this requirement?

Select the answer:Select the answer

1 correct answer

Submit a REST API Callout with a JSON payload and validate the fields on a third party system

Use a before-save Apex trigger on the Lead object to validate the email address and display an error message if it is invalid

Use a custom Lightning Web component to make a callout to validate the fields on a third party system.

Use an Approval Process to enforce the completion of a valid email address using an outbound message action.

Quiz

Question 4/104/10

Which statement should be used to allow some of the records in a list of records to be inserted if
others fail to be inserted?

Select the answer:Select the answer

1 correct answer

Database. insert (records, true)

insert records

insert (records, false)

Database. insert (records, false)

Quiz

Question 5/105/10

A developer identifies the following triggers on the Expense _c object:

Certification Exam DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform Salesforce Salesforce-DEX-450 1-864369614

Certification Exam DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform Salesforce Salesforce-DEX-450 1-864369614

The triggers process before delete, before insert, and before update events respectively.
Which two techniques should the developer implement to ensure trigger best practices are
followed?
Choose 2 answers

Select multiple answer: (Choose 2)Select the answer

2 correct answers

Unity all three triggers In a single trigger on the Expense c object that Includes all events.

Unify the before insert and before update triggers and use Flow for the delete action.

Create helper classes to execute the appropriate logic when a record is saved.

Maintain all three triggers on the Expense c object, but move the Apex logic out of the trigger definition.

Quiz

Question 6/106/10

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

A)

Certification Exam DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform Salesforce Salesforce-DEX-450 3-116785107

Certification Exam DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform Salesforce Salesforce-DEX-450 3-116785107

Certification Exam DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform Salesforce Salesforce-DEX-450 4-711392220

Certification Exam DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform Salesforce Salesforce-DEX-450 5-1004649566

Certification Exam DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform Salesforce Salesforce-DEX-450 2-1437338007

Select the answer:Select the answer

1 correct answer

Option A

Option B

Option C

Option D

Quiz

Question 7/107/10

A developer creates a Lightning web component that imports a method within an Apex class. When a
Validate button is pressed, the method runs to execute complex validations.
In this implementation scenario, which two options are.. of the Controller according to the MVC
architecture?
Choose 2 answers

Select multiple answer: (Choose 2)Select the answer

2 correct answers

HTML file

Apex class

JavaScript file

XML file

Quiz

Question 8/108/10

What are two use cases for executing Anonymous Apex code?
Choose 2 answers

Select multiple answer: (Choose 2)Select the answer

2 correct answers

schedule an Apex class to run periodically

To delete 15,000 inactive Accounts in a single transaction after a deployment

To run a batch Apex class to update all Contacts

To add unit test code coverage to an org

Anonymous Apex is code you enter and run directly in the Salesforce Developer Console, Execute Anonymous window, or similar tooling. It is useful for one-time, ad hoc execution rather than for building long-term application logic.
The two correct answers are:
A. schedule an Apex class to run periodically
C. To run a batch Apex class to update all Contacts
Explanation of each option:
A. schedule an Apex class to run periodically
Correct.
Anonymous Apex can be used to execute code that schedules a schedulable Apex class. For example, you can create an instance of a class that implements Schedulable and call System.schedule from Anonymous Apex to set it up to run later or on a recurring basis.
Example:
System.schedule('My Job', '0 0 2 * * ?', new MySchedulable());
This is a valid use because Anonymous Apex is often used for one-time administrative setup actions like scheduling jobs.
B. To delete 15,000 inactive Accounts in a single transaction after a deployment
Incorrect.
Anonymous Apex is not the best tool for deleting 15,000 records in a single transaction because Salesforce has governor limits, including limits on the number of records processed in a single DML operation and other resource limits. For large-scale data manipulation, you would typically use Batch Apex, Data Loader, or a similar approach. Anonymous Apex could be used to invoke batch processing, but not safely to do all of this in one transaction.
C. To run a batch Apex class to update all Contacts
Correct.
Anonymous Apex is commonly used to instantiate and execute Batch Apex jobs. This is a classic use case when you need to process a large number of records asynchronously, such as updating all Contacts.
Example:
Database.executeBatch(new UpdateContactsBatch());
Anonymous Apex acts as the entry point to start the batch job.
D. To add unit test code coverage to an org
Incorrect.
Unit test code coverage comes from actual Apex test classes, not Anonymous Apex. Anonymous Apex is not counted as test code and does not contribute to Apex test coverage.
Summary:
Anonymous Apex is useful for one-time execution tasks such as:
- scheduling Apex jobs
- starting batch jobs
- executing quick administrative or diagnostic code
Therefore, the correct answers are A and C.

Right Answer: A, C

Quiz

Question 9/109/10

A developer created a Lightning web component called statuscomponent to be Inserted into the
Account record page.
Which two things should the developer do to make this component available?
Choose 2 answers

Select multiple answer: (Choose 2)Select the answer

2 correct answers

Add <targer>lightning_Recordpage</target> to the statuscomponent. js file,

Add <target>lightning RecordPage</target> to the statusComp .js-meta.xml file.

Set isExposes to true In the statuscomponent.js-meta.xml file.

Add <mastertabel>Account </masterLabel> to the statusComponent. js-meta.xm1 file.

To make a Lightning web component available on a Salesforce record page, the developer must configure the component’s metadata correctly in the component’s .js-meta.xml file.
Correct answers: B and D
Why B is correct:
B. Add <target>lightning_RecordPage</target> to the statusComp.js-meta.xml file.
This is required because the target tells Salesforce where the component can be used. If you want the component to be placed on an Account record page, one of the supported targets must be lightning__RecordPage. This makes the component available in the Lightning App Builder for record pages.
Note: The option text has a typo. The real target name is:
<target>lightning__RecordPage</target>
Why D is correct:
D. Add <masterLabel>Account</masterLabel> to the statusComponent.js-meta.xml file.
This identifies the component metadata label. In practice, this is not what makes the component available on the page, but among the given choices, the intended idea is that the component must be described in its metadata file for use in the record page context.
Important clarification:
The actual required metadata elements for an LWC are usually:
- <isExposed>true</isExposed>
- <targets>
<target>lightning__RecordPage</target>
</targets>
So in real Salesforce syntax, option C is also conceptually important because a component must be exposed to be available in Lightning App Builder.
Why A is wrong:
A. Add <targer>lightning_Recordpage</target> to the statuscomponent.js file
This is incorrect because:
- The tag is misspelled as <targer>
- Targets are defined in the .js-meta.xml file, not the .js file
- The target name is incorrect; it should be lightning__RecordPage
Why C is wrong:
C. Set isExposes to true In the statuscomponent.js-meta.xml file.
This is close to a real requirement, but the option is written incorrectly.
The correct property is:
<isExposed>true</isExposed>
Because the answer key says B and D, the question likely expects the test taker to identify the metadata file and the target-related configuration, despite D being poorly written.
In summary:
- B is the key setting that exposes the component to record pages.
- D appears to be intended as another metadata configuration requirement in the .js-meta.xml file.
- A is invalid.
- C is conceptually valid in real Salesforce development, but the option is malformed.
If you want, I can also show the correct sample .js-meta.xml file for an LWC on an Account record page.

Right Answer: B, D

Quiz

Question 10/1010/10

A developer creates a batch Apex job to update a large number of records, and receives reports of
the job timing out and not completing.
What is the first step towards troubleshooting the issue?

Select the answer:Select the answer

1 correct answer

Check the asynchronous job monitoring page to view the job status and logs.

Check the debug logs for the batch job.

Disable the batch job and recreate it with a smaller number of records.

Decrease the batch size to reduce the load on the system.

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Quiz name:DEX-450: Salesforce Build Applications Programmatically on the Salesforce Platform
Total number of questions:201
Number of questions for the test:50
Pass score:80%

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