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What is hadoop? Name the main components of a hadoop application?
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Explain how can you check whether namenode is working beside using the jps command?
What does hadoop-metrics.properties file do?
What is a Backup node in Hadoop?
Mention what are the most common input formats defined in hadoop?
What is the command to change the replication factor ?
What does hadoop-env.sh do?
What is the default replication factor in Hadoop and how will you change it?
What is distributed copy (distcp)?
Can you explain the common input formats in hadoop?
After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
Explain the core methods of the reducer?
Which database is used in hadoop?
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Apache Hadoop (394) - MapReduce (354)
- Apache Hive (345)
- Apache Pig (225)
- Apache Spark (991)
- Apache HBase (164)
- Apache Flume (95)
- Apache Impala (72)
- Apache Cassandra (392)
- Apache Mahout (35)
- Apache Sqoop (82)
- Apache ZooKeeper (65)
- Apache Ambari (93)
- Apache HCatalog (34)
- Apache HDFS Hadoop Distributed File System (214)
- Apache Kafka (189)
- Apache Avro (26)
- Apache Presto (15)
- Apache Tajo (26)
- Hadoop General (407)
