When writing searches in Splunk, which of the following is true about Booleans?

In Splunk searches, Boolean operators such as AND, OR, and NOT must be written in uppercase. This is a specific requirement of the search language, which helps distinguish these operators from standard terms that might be present in the event data. Uppercasing the Boolean operators enhances readability and ensures that Splunk accurately interprets them as logical functions that control how searches are processed.

Given this context, using uppercase for Booleans is crucial in avoiding potential misinterpretation by the search engine, which might occur if they were written in a different format. The incorrect options refer to characteristics or syntax that do not apply to Boolean operators within Splunk's search language. For example, while quotes and parentheses have specific uses in search queries (such as grouping conditions or denoting phrases), they are not a requirement for Boolean operators.