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Which directory does hadoop install to?
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Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?
Define data cleansing?
What happens if the number of reducers is 0 in Hadoop?
What are the core methods of a Reducer?
Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
What is the use of context object?
Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?
List some use cases where classification machine learning algorithms can be used.
what happens when namenode goes down during file read operation in hadoop?
What happen if a datanode loses network connection for a few minutes?
Clarify how job tracker schedules an assignment?
What are the port numbers of namenode?
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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)
