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Which of the following statements is true?

Question: Which of the following statements is true?

  1. The NameNode in Hadoop 2 is fully fault-tolerant, whereas in Hadoop 1 it was a single point of failure.
  2. The NodeManager in Hadoop 2 replaces the TaskTracker in Hadoop 1.
  3. YARN requires a minimum of two nodes, one master and one slave, to run
  4. Both MapReduce and YARN can scale to any cluster size.

Correct Answer: 2

About MapReduce and YARN

Apache Hadoop is one of the most popular tools for big data processing. It has been successfully deployed in production by many companies for several years. Though Hadoop is considered a reliable, scalable, and cost-effective solution, it is constantly being improved by a large community of developers.

As a result, the 2.0 version offers several revolutionary features, including Yet Another Resource Negotiator (YARN), HDFS Federation, and high availability, which make the Hadoop cluster much more efficient, powerful, and reliable.”

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