Ace the Salesforce PDII Exam: Ultimate Preparation Guide

Using the @testSetup annotation to define a method that creates test data before the tests run can significantly speed up test execution by reducing the setup time for each test method in the class. This method runs once before any test method in the class and can be used by all test methods.References: Apex Developer Guide - Reducing Test Data Creation

Queueable Apex is suitable for complex processes that require chaining jobs to run sequentially. It can handle long-running processes without hitting governor limits, as each chained job runs in a new transaction with its own set of governor limits.References: Apex Developer Guide - Queueable Apex

To display the contacts' mailing addresses in the Lightning web component, both the SOQL query in the getAccountContacts method and the columns attribute in the JavaScript file of the component need to be updated. The query must include the MailingAddress field, and the JavaScript file must be modified to add this field to the columns shown in the lightning-datatable.References: Lightning Web Components Developer Guide - lightning-datatable

Option D, which uses the Database.query() method in combination with a for loop, is the most memory-efficient way to process records. This is known as the Query Locator pattern, which allows you to work with a large number of records by querying them in batches. This approach helps to avoid hitting the governor limit for "Apex heap size too large" as it processes one record at a time from the database without storing the entire result set in memory.

References:

• Working with Very Large SOQL Queries
• Apex Governor Limits

Replacing custom settings with custom metadata types is a good solution to ensure that test data is consistent across environments. Custom metadata types are deployable, and their records are available in test methods by default, unlike List Custom Settings which need to be manually recreated in each environment after a refresh.References: Salesforce Help - Custom Metadata Types Overview

When you want a Lightning web component to only render for a specific form factor, you can use the <targets> tag within the component’s .xml configuration file. To specify that the component should only appear on a desktop, you use the <targetConfig> tag with the targets="lightning__RecordPage" attribute and nest a <supportedFormFactors> tag inside it. Within this tag, you include a <supportedFormFactor> tag with the attribute type="Large".

Option B is the correct markup to ensure that the component only appears for the desktop form factor on a record page.

References:

• Lightning Web Components Developer Guide - Configure Components for Lightning Experience and the Salesforce Mobile App

The use of getRecordTypeInfosByDeveloperName is a best practice to handle record types. This approach avoids the need for SOQL queries, reducing the number of governor limits consumed, and efficiently retrieves record type Ids by their DeveloperName, which is consistent across all Salesforce environments.References: Apex Developer Guide - Describing sObjects and sObject Fields

The System.runAs() method is used in test classes to enforce record sharing. This method allows you to write test methods that change user contexts to ensure that the proper record sharing is enforced. References:

• Understanding the runAs Method

Implementing pagination using the standard Account List controller in Visualforce is a proven method to improve performance when displaying large sets of data. Pagination allows only a subset of records to be fetched and displayed at a time, thereby reducing the load time of the page.References: Visualforce Developer Guide - Implementing Pagination