Final answer:
Sqoop indeed uses the JDBC connection to transfer data between Hadoop and relational databases, which is true. It facilitates the import and export of data using JDBC to connect with relational database systems.
Step-by-step explanation:
The statement that Sqoop works through the JDBC connection is true. Sqoop is a tool designed to transfer data between Hadoop and relational databases. It uses JDBC (Java Database Connectivity) to connect to the relational database and import or export data to Hadoop's HDFS (Hadoop Distributed File System). This process allows for efficient transfer of large amounts of data and is a critical component of many big data workflows that involve relational databases.
For example, a company may use Sqoop to import daily transaction data from a MySQL database into Hadoop for analysis, or to export processed data from Hadoop back into a PostgreSQL database for use by other applications. The JDBC interface is instrumental in facilitating this communication between Hadoop and the relational database systems.