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

Is it important for Hadoop MapReduce jobs to be written in Java?

845

what job does the conf class do?

792

What is the key- value pair in Hadoop MapReduce?

679

What is InputFormat in Hadoop MapReduce?

669

What are the various InputFormats in Hadoop?

650

Explain InputSplit in Hadoop MapReduce?

676

How much space will the split occupy in Mapreduce?

672

What is a RecordReader in Hadoop MapReduce?

676

What is the difference between HDFS block and input split?

887

How to write MapReduce Programs?

718

What is Apache Hive?

830

What kind of applications is supported by Apache Hive?

812

How can you configure remote metastore mode in Hive?

829

What is indexing and why do we need it?

825

What is the use of Hcatalog?

938

Un-Answered Questions { Hadoop }

What does hbase consists of?

181

What bit version that ambari needs and also list out the operating systems that are compatible?

List out the various advantages of dataframe over rdd in apache spark?

305

Explain about the common workflow of a Spark program?

339

Give the differences between the different types of primary keys in cassandra?

Mention what happens if the preferred replica is not in the ISR?

555

What are the additional benefits YARN brings in to Hadoop?

963

Define Simple Strategy?

128

Define commit log?

Elaborate on cassandra - cql?

Why spark is faster than hadoop?

248

What are shared variables?

332

Do you need to install Spark on all nodes of Yarn cluster while running Spark on Yarn?

649

Explain what is Cassandra-Cqlsh?

In which language apache kafka is written?

534

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