Final answer:
The assertion that using sstableloader on a live Cassandra cluster is not allowed is false. The sstableloader is meant for importing data into a running cluster, facilitating bulk data loading operations.
Step-by-step explanation:
The statement that using sstableloader to load data into a live, active cluster is not allowed is false. The sstableloader is indeed designed to import large volumes of data into a running Apache Cassandra cluster without downtime. It streams sorted string tables (SSTables) into a live cluster, allowing for the bulk loading of data. This utility is particularly useful when moving data from one cluster to another or when integrating with external systems that have exported their data in the SSTable format.