Planning, transit, and public-health teams all want CPU and memory on the same city Hadoop cluster. What is YARN’s primary role?
Select an answer to reveal the explanation.
Short Explanation
Picture a fair front desk handing out meeting rooms when three departments show up at once. YARN is that desk for the cluster: it negotiates CPU and memory so MapReduce, Spark, and friends can share one yard. It is not a file system replacement or a citizen app store.
Full Explanation
YARN (Yet Another Resource Negotiator) is the Hadoop cluster resource manager. It allocates CPU and memory containers so multiple frameworks and jobs can share the same machines. HDFS remains the storage layer; YARN does not replace durable storage, spreadsheet encryption, or public portal publishing.