Platform Developer I Certification Maintenance (Winter '24)

Due Date: December 6, 2024

1. Which SOQL keywords can be used to respect the object permissions of the running user for a query in Apex code?

A. WITH USER_MODE

2. Where can an error message be displayed by adding the Custom Error Message element to a flow?

A. In a window on the record page and As an inline error on a specific field

3. Why are the lwc:if, lwc:elseif, and lwc:else conditional directives more efficient than the legacy if:true and if:else directives?

A. Property getters are accessed only once per instance of the directive.

4. Which of the following can be used to iterate through lists or sets in a for loop?

C. Iterable variable

5. Which Apex feature can be used to customize the behavior of the List.sort() method?

B. Comparator interface

Get Hands-on with Bind Variables in a SOQL Query

Launch the org you’ll use for the hands-on challenge, then do the following prework.

Step: 1

Now, as mentioned in trailhead challenge, we need to create one apex class.

To open the Developer Console from Salesforce Classic:

1. Click Your Name.
2. Click Developer Console.

To open the Developer Console from Lightning Experience:

1. Click the quick access menu ().
2. Click Developer Console.

Follow below steps in developer console
File > New > Apex Class

Step: 2

As mentioned in trailhead challenge, enter 'Apex Class' name and click 'OK' button.
    Class Name: QueryContact

Step: 3 

Copy below mentioned code and paste in developer console and 'Save' this apex class.

public class QueryContact {

  public static Id getContactID(String lastName, String title) {

    try {

      Contact myContact = Database.query(

        'SELECT ID FROM Contact WHERE lastName = :lastName AND title = :title LIMIT 1'

      );

      return myContact.Id;

    } catch (Exception ex) {

      return null;

    }

  }

  public static Id getContactIDWithBinds(Map<String, Object> bindVars) {

String query = 'SELECT ID FROM Contact WHERE lastName = :lastName AND title = :title LIMIT 1';

    List<Contact> listContacts = Database.queryWithBinds(query,bindVars, AccessLevel.USER_MODE);

      if(listContacts != null && !listContacts.isEmpty()){

          return listContacts[0].Id;

      }else{

      return null;      

      }

    }

}