Reference:
https://www.edureka.co/blog/splunk-events-event-types-and-tags/

Explanation/Reference: https://docs.splunk.com/Documentation/Splunk/8.0.3/Search/Abouttransactions

Reference:https://docs.splunk.com/Documentation/SplunkCloud/8.0.2003/Knowledge/Defineeventtypes
When multiple event types with different color values are assigned to the same event, the color displayed for
the events is determined by the priority of the event types. The priority is a numerical value that indicates how
important an event type is. The higher the priority, the more important the event type. The event type with the
highest priority will determine the color of the event.

A comparison operator is a symbol that compares two values and returns a Boolean result (true or false)2. Splunk supports various comparison operators such as <, >, =, !=, <=, >=, IN and LIKE2. However,
?= is not a valid comparison operator in Splunk and will cause a syntax error if used in a search string2.
Therefore, option E is correct, while options A, B, C and D are incorrect because they are valid comparison operators in Splunk

The building block of a data model. Each data model is composed of one or more data model datasets. Each dataset within a data model defines a subset of the dataset represented by the data model as a whole.
Data model datasets have a hierarchical relationship with each other, meaning they have parent-child relationships. Data models can contain multiple dataset hierarchies. There are three types of dataset hierarchies: event, search, and transaction.
https://docs.splunk.com/Splexicon:Datamodeldataset