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When Namenode is down what happens to job tracker?
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What is Reduce only jobs?
In Hadoop, which file controls reporting in Hadoop?
When should you use sequencefileinputformat?
What combiners are and when you should utilize a combiner in a map reduce job?
Which are the methods in the mapper interface?
Explain the general mapreduce algorithm
What are advantages of Spark over MapReduce?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
What is heartbeat in hdfs? Explain.
How does Mappers run method works?
what is a sequence file in Hadoop?
Mention Hadoop core components?
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- Apache HDFS Hadoop Distributed File System (214)
- Apache Kafka (189)
- Apache Avro (26)
- Apache Presto (15)
- Apache Tajo (26)
- Hadoop General (407)
