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 is impala’s aggregation strategy?

What does impala do for fast access?

How is impala metadata managed?

What size is recommended for each node?

214

What impala use for authentication?

Can impala do user-defined functions (udfs)?

What is used to store data generally?

State use cases of impala?

How do I load a big csv file into a partitioned table?

How does impala process join queries for large tables?

Can I do insert … select * into a partitioned table?

What happens if there is an error in impala?

260

Is it possible to share data files between different components?

Does if offer scaling?

Is there a dual table?

Un-Answered Questions { Hadoop }

What are the hadoop configuration files at present?

530

Is there any API available for implementing graphs in Spark?

322

What is the latest version of sqoop?

What is a pipelinedrdd?

450

Why is transformation lazy operation in Apache Spark RDD? How is it useful?

302

Define fold() operation in Apache Spark?

319

What are ‘reduces’?

774

Can you use Spark to access and analyse data stored in Cassandra databases?

392

Explain Alter Table Statement in HCatalog?

Is apache flume real time processing framework?

Why is cqlsh used?

140

What are the four essential parameters of a mapper?

708

Why do we need Hadoop Archives? How is it created?

612

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

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

715

For More Un-Answered { Hadoop } Questions Click Here