In Hadoop’s distributed storage system, which of the following is responsible for managing and storing the actual data blocks?

DataNode in Hadoop's HDFS (Hadoop Distributed File System) is responsible for managing and storing the actual data blocks. DataNodes perform read/write operations on the data blocks as directed by the NameNode and report back with the status of the operations. a) Job Tracker : The Job Tracker manages the jobs and distributes tasks to various TaskTrackers, not data blocks. b) NameNode : The NameNode manages the metadata and directory structure of HDFS but does not store data itself. d) YARN : YARN (Yet Another Resource Negotiator) is responsible for cluster resource management and job scheduling, not data storage. e) HDFS Client : The HDFS Client is used to interact with the HDFS, not to store or manage data blocks.