Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?
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What happen on the namenode when a client tries to read a data file?
What is the block size in Hadoop?
What are the features of Standalone (local) mode?
Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?
Is hadoop still in demand?
Mention what is rack awareness?
What do you think about the speculative execution?
What are the primary phases of the reducer?
What is KeyValueTextInputFormat in Hadoop?
List out some common problems faced by data analyst?
Explain what is a sequence file in hadoop?
Give a brief overview of Hadoop history?
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)