Online Access Free Plat-Dev-301 Exam Questions

Business rules require a Contact ta always be created when a new Account is created.
What can be used when developing a custom screen to ensure an Account is not created if the creation of the Contact fails?

• A.Disable validation rules on Contacts and set default values with a trigger.
• B.Use the Database. Delete method if the Contact insertion fails.
• C.Use setSaverpoint (1) and rollback() with a try-catch block.
• D.Use the Database. Insect method with a11orNone SEL LO alee,

A company has a Lightning page with many Lightning Components, some that cache reference dat a. It is reported that the page does not always show the most current reference data.
What can a developer use to analyze and diagnose the problem in the Lightning page?

• A.Salesforce Lightning Inspector Actions tab
• B.Salesforce Lightning Inspector Event Log tab
• C.Salesforce Lightning Inspector Storage tab
• D.Salesforce Lightning Inspector Transactions tab

Universal Containers develops a Salesforce application that requires frequent interaction with an external REST API.
To avoid duplicating code and improve maintainability, how should they implement the APL integration for code reuse?

• A.Create a reusable Apex class for the AFL integration and invoke it from the relevant Apex classes.
• B.Use a separate Apex class for each API endpoint to encapsulate the integration logic,
• C.Store the APT integration code as a static resource and reference it in each Apex class.
• D.Include the API integration code directly in each Apex class that requires it.

A developer is creating a Lightning web component that displays a list of records in a lightning-datatable. After saving a new record to the database, the list is not updating.

What should the developer change in the code above for this to happen?

• A.Add the @track decorator to the data variable.
• B.Create a variable to store the result and call refreshpex().
• C.Create a new variable to store the result and annotate it with @track.
• D.Call rafrasnApex() ON this.dazta.

There is an Apex controller and a Visualforce page in an org that displays records with a custom filter consisting of a combination of picklist values selected by the user.
The page takes too long to display results for some of the input combinations, while for other input choices it throws the exception, "Maximum view state size limit exceeded".
What step should the developer take to resolve this issue?

• A.Split the layout to filter records in one Visualforce page and display the list of records in a second page using the same Apex controller.
• B.Remove instances of the transient keyword from the Apex controller to avoid the view state error.
• C.Adjust any code that filters by picklist values since they are not indexed,
• D.Use a StandardSetController or SOQL LIMIT in the Apex controller to limit the number of records displayed at a time.