Describe the Hadoop Ecosystem, HDFS, and Data Ingestion Tools DATA-ENGINEERING-OPTIMIZE Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   When a client reads a file from HDFS, what is the first step it performs?

   • AIt contacts the NameNode to get the block locations.
   • BIt sends a request to the secondary NameNode.
   • CIt writes a temporary copy to the local disk.
   • DIt reads the data directly from the nearest DataNode.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   Which tool is best suited for importing data from a relational database into HDFS?

   • AFlume
   • BKafka
   • COozie
   • DSqoop
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   You need to ingest data from a MySQL database into HDFS on a daily basis. Which tool should you use?

   • AHive
   • BSqoop
   • CKafka
   • DFlume
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   In HDFS, what is the role of the NameNode?

   • AIt replicates data blocks across the cluster.
   • BIt stores the actual data blocks of files.
   • CIt maintains the metadata and namespace of the file system.
   • DIt coordinates MapReduce job execution.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   In the Hadoop ecosystem, which component is responsible for resource management and scheduling jobs across the cluster?

   • AHive
   • BHDFS
   • CMapReduce
   • DYARN
   Reveal Solution Discussion Select an answer first