@Kevin Han I don't think Hortonworks has a HDFCNA practice exam. As you can see https://br.hortonworks.com/services/training/certification/hdfcna-certification/ they do not mention anything about practice exam. You can set up a HDF environment and try to create some task to practice. Example Scenario: Getting Logs Files from a Server and split them into ERROR and WARN messages. If the log has ERROR send it to Hbase if WARN sent it to Hive. Best luck in your exam!
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