Free Access to Salesforce.DEX-450.v2026-06-04.q112 with Valid Practice Test (Page 5)

Question 16

What is the result of the following code?

A.The record will be created and a message will be in the debug log.
B.The record will not be created and an exception will be thrown.
C.The record will not be created and no error will be reported.
D.The record will be created and no error will be reported.

Question 17

Management asked for opportunities to be automatically created for accounts with annual revenue greater than $1,000,000. A developer created the following trigger on the Account object to satisfy this requirement.

Users are able to update the account records via the UI and can see an opportunity created for high annual revenue accounts. However, when the administrator tries to upload a list of 179 accounts using Data Loader, It fails with system. Exception errors.
Which two actions should the developer take to fix the code segment shown above?
Choose 2 answers

A.Move the DML that saves opportunities outside the for loop.
B.Query for existing opportunities outside the for loop.
C.Use Database.query to query the opportunities.
D.Check if all the required fields for Opportunity are being added on creation.

Question 18

A Next Best Action strategy uses an Enhance element that invokes an Apex method to determine a discount level for a Contact, based on a number of factors.
What is the correct definition of the Apex method?

A.
B.
C.
D.

Question 19

A developer has a Visualforce page and custom controller to save Account records. The developer wants to display any validation rule violations to the user.
How can the developer make sure that validation rule violations are displayed?

A.Include <apex:messages> on the Visualforce page.
B.Use a try/catch with a custom exception class.
C.Add custom controller attributes to display the message.
D.Perform the DML using the patabase.upsert () method.

Correct Answer: A

When saving records using a custom controller in a Visualforce page, validation rule violations can occur. To display these validation error messages to the user, the developer should use the <apex:messages> component.
Option A: Include <apex:messages> on the Visualforce page.
Correct Approach.
The <apex:messages> component displays all messages that were generated for all components on the page, including validation rule violations.
When a DML operation is performed, any validation errors are automatically added to the ApexPages message collection.
Including <apex:messages> in the page ensures that these messages are displayed to the user.
Example:
<apex:page controller="CustomAccountController">
<apex:form>
<apex:messages />

<apex:commandButton action="{!saveAccount}" value="Save" />
</apex:form>
</apex:page>
While a try/catch block can catch exceptions, it is not required for displaying validation errors.
Validation rule violations are added to the message collection automatically.
Using try/catch may suppress the standard error handling.
Option C: Add custom controller attributes to display the message.
Inefficient Approach.
Manually adding controller attributes and logic to handle error messages adds unnecessary complexity.
The standard <apex:messages> component handles this automatically.
Option D: Perform the DML using the Database.upsert() method.
Not Sufficient Alone.
Using Database.upsert() allows for finer control over DML operations and error handling.
However, unless the errors are added to the message collection, they will not be displayed.
The developer would still need to handle displaying the errors.
Conclusion:
By including the <apex:messages> component on the Visualforce page, validation rule violations and other error messages are displayed to the user automatically.
Therefore, Option A is the correct answer.
Reference:
apex
https://developer.salesforce.com/docs/atlas.en-us.pages.meta/pages/pages_compref_messages.htm Displaying Errors Option B: Use a try/catch with a custom exception class.
Not Necessary.

Question 20

An Apex method, getAccounts, that returns a list of Accounts given a searchTerm, is available for Lightning Web Components to use.
What is the correct definition of a Lightning Web Component property that uses the getAccounts method?

A.
B.
C.
D.

Question 16

Question 17

Question 18

Question 19

Question 20

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