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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 (Setup gear icon).
  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;      
      }
    }
}
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