Salesforce Platform Developer Practice Exam

What is a correct programming pattern in Apex on a Multi-tenant platform?

1. Apex code is created separately to reduce deployment errors.

2. DML is performed on individual records to prevent concurrency issues.

3. Queries select the fewest fields to avoid exceeding governor limits.

4. Apex classes use the 'without sharing' keyword by default.

The correct answer is: Queries select the fewest fields to avoid exceeding governor limits.

The choice highlighting that queries should select the fewest fields to avoid exceeding governor limits is correct because Salesforce enforces strict limits on resources, including the number of records retrieved and the amount of data processed in a single transaction. When writing Apex code, selecting only the fields that are needed for processing optimizes the query and reduces the overall footprint of the operation. This practice helps maintain efficiency, preventing governor limits from being hit, which can lead to exceptions and failures in the execution of the code. By selecting minimal fields, developers can also reduce the amount of data that needs to be serialized and sent over the network, which enhances performance and responsiveness in a multi-tenant environment where many customers share the same resources. Overall, this approach is aligned with best practices for efficient and scalable coding in Apex, particularly on the multi-tenant Salesforce platform.