What task is performed at regular intervals to keep the TcFTSIndexer object data up to date?

The task that is performed at regular intervals to keep the TcFTSIndexer object data up to date is best described by the option that involves "Clear and Index." This process ensures that the index, which is essential for searching and retrieving indexed data efficiently, is refreshed and maintained. Over time, the data may change, be deleted, or become outdated; thus, regularly clearing and re-indexing helps in maintaining the accuracy and performance of searches.

When you clear the index, you remove any outdated or irrelevant entries, allowing the new data to be correctly indexed. This is crucial for the efficiency of the full-text search capabilities within Teamcenter, ensuring that users get the most relevant and current results when they perform searches.

Other options, while related to data management, do not specifically focus on the indexing of object data in the same direct manner. For example, archiving and backing up are important for data preservation but do not directly relate to maintaining the search index. Similarly, refreshing and validating or updating and optimizing might pertain to general data management tasks but do not explicitly encompass the necessary steps for keeping the TcFTSIndexer effective. Thus, the "Clear and Index" process is key to ensuring the index remains relevant and functional.