Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

what does /*streamtable(table_name)*/ do?

813

what is (HS2) HiveServer2?

726

Explain how cassandra delete data?

102

Mention what needs to be taken care while adding a column?

Mention when you can use alter keyspace?

Define memtable?

Explain how cassandra writes data?

Explain what is memtable in cassandra?

Explain cap theorem?

105

What are the Difference between MongoDB and Cassandra?

What is the function of Cluster.Builder class in Cassandra?

147

What is SSTable? How is it different from other relational tables?

122

How does Cassandra write?

Explain the concept of bloom filter?

Explain the concept of Tunable Consistency in Cassandra?

202

Un-Answered Questions { Hadoop }

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1139

Name three data source available in SparkSQL

319

How can we change the split size if our commodity hardware has less storage space?

711

What is spark dynamic allocation?

330

what is JobTracker in Hadoop? What are the actions followed by Hadoop?

821

What is partitioning key?

588

What is troubleshooting for impala?

how JobTracker schedules a task ?

899

Can you explain spark rdd?

304

How do you organize the pig latin statements?

632

What are the key elements in ZooKeeper Architecture?

If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

498

What are the purposes of using Ambari shell?

What counter in Hadoop MapReduce?

693

What is different table structure available in the hive?

710

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