Salesforce Admin Certification Practice Test 2026 - Free Salesforce Admin Exam Questions and Study Guide

The correct answer is that Checkbox and Currency are data types that cannot be changed once defined for fields in Salesforce.

In Salesforce, once a field has been created with a specific data type, it becomes challenging to modify that type if the field is already in use. The Checkbox data type is a binary choice (true/false) and changing this to another type would require a complete redesign of how data is captured and managed. Similarly, Currency fields are utilized in specific financial computations and changing their type would disrupt existing formulas, reports, and integrations that rely on that data.

Understanding the limitations of changing field types is crucial for careful planning when designing data models in Salesforce. Fields such as Text, Number, Picklist, and Text Area can generally be modified under certain conditions, but Checkbox and Currency types remain fixed to ensure data integrity and consistency throughout the system.