Answer / Subhash Chand Sharma

To check if the NameNode is functioning properly, you can use the following methods: 1) Access the Hadoop web UI at http://namenode_host:50070. If the NameNode is up and running, you will see various information about the cluster. 2) Run 'jps' command on the NameNode host to check if the NameNode process is running. 3) Use the 'hadoop fsck' command to perform a filesystem check.

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