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 load do concurrent queries produce on the namenode?

How can it help for avoiding costly modeling?

What is the use of expand cqlsh command in Cassandra?

What is Kundera in Cassandra?

What are the consistency levels for read operations in Cassandra?

How the read operation is performed on Cassandra node ?

102

How the write operation is performed on Cassandra node ?

What is the difference between Column and SuperColumn?

150

What do you mean by Thrift in Cassandra?

What are components of Cassandra Data Model?

In which language Cassandra is written?

What is the difference between a node, a cluster, and data centre?

255

What are the main components of Cassandra data models?

117

What are the other components of Cassandra?

What is Cassandra-Cqlsh?

129

Un-Answered Questions { Hadoop }

How we can check hadoop sqoop installed or not in a system?

What is a task tracker?

What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?

857

Why HDFS stores data using commodity hardware despite the higher chance of failures in hadoop?

What is shuffle read and shuffle write in spark?

316

Is there any difference between HBase datamodel and RDBMS datamodel?

1089

When to choose "Internal Table" in Hive?

726

What is hdfs spark?

287

What are the different Data Types available in Hive?

714

What if a namenode has no data?

673

What is DistributedCache and its purpose?

911

What are different String functions available in PIG?

600

How does reducebykey work in spark?

260

Explain about the major libraries that constitute the Spark Ecosystem?

421

What is Zookeeper Cluster?

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