What is the outcome when a data type is set to read-only?

When a data type is set to read-only, it is specifically configured to prevent any modifications, ensuring that the data can only be displayed without offering the ability to change it. This setting is particularly useful in scenarios where the integrity of data needs to be upheld, as users can view the information but are restricted from altering it in any way. The read-only attribute is commonly employed to protect sensitive information or to provide a stable reference point for users without allowing accidental or unauthorized changes.

In contrast, options suggesting that the data can be modified, deleted, or viewed and edited contradict the fundamental principle of a read-only setting, which is designed solely for display purposes. Hence, the outcome of a data type set to read-only is that it can only be displayed, aligning perfectly with the correct answer.