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

Explain HCatLoader APIs?

Explain HCatInputFormat and HCatOutputFormat?

Explain HCatStorer APIs?

Explain HCatWriter?

Name all HCatalog Features?

State syntax of the command to drop an index?

Name Applications and Use Cases of HCatalog?

Which command is used to SHOW PARTITIONS lists in HCatalog?

Explain HCatReader?

What is the role of data transfer API in HCatalog?

State syntax of the command that is used to drop a partition?

Explain HCatInputFormat?

What are the main classes of Data Transfer API?

Explain Creating an Index?

What is the no. Of threads created by impala?

Un-Answered Questions { Hadoop }

what are relational operations in pig latin?

874

What are the complex datatypes in pig?

988

What is Data Log in Kafka?

818

What are best features of Apache Avro?

Is it possible to provide multiple input to Hadoop? If yes then how?

508

When executing Hive queries in different directories, why is metastore_db created in all places from where Hive is launched?

847

What is hadoop, hbase, hive and cassandra? Specify similarities and differences among them.

130

What are the difference between of the “HDFS Block” and “Input Split”?

Explain Spark countByKey() operation?

327

What is Sparse Vector?

341

Explain lineage graph

320

Does 'ILLUSTRATE' run a MapReduce job?

531

What is compaction in hbase?

171

List the various types of "Cluster Managers" in Spark.

345

What is a worker node in Apache Spark?

301

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