What happens to job tracker when namenode is down?
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What problems can be addressed by using Zookeeper?
What are the core components of Apache Hadoop?
Input Split & Record Reader and what they do?
How indexing is done in HDFS?
Can Apache Kafka be used without Zookeeper?
Explain the shuffle?
What is the communication channel between client and namenode/datanode?
Explain the use of tasktracker in the hadoop cluster?
What is commodity hardware?
What is a Combiner?
How can you connect an application
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?