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 the architecture of Hadoop Pig?

792

What is the difference between Apache Pig and Hive?

656

What is the difference between Pig and MapReduce?

652

Explain Features of Pig?

708

What is Pig Storage?

643

While writing evaluate UDF, which method has to be overridden?

608

What are the different UDF’s in Pig?

691

What is Apache Hadoop? Why is Hadoop essential for every Big Data application?

965

What are the core components of Apache Hadoop?

829

What is the difference between Apache Hadoop and RDBMS?

852

How is security achieved in Apache Hadoop?

963

What is Apache Hadoop?

899

What is a “Distributed Cache” in Apache Hadoop?

822

What is the problem with small files in Apache Hadoop?

839

What is Rack Awareness in Apache Hadoop?

858

Un-Answered Questions { Hadoop }

Explain what do you understand by cassandra- cql collections?

Can we run spark without hadoop?

306

What is Sqoop Import? Explain its purpose?

How can you see the list of stored jobs in sqoop metastore?

How to overwrite an existing output file during execution of mapreduce jobs?

1134

Why we need compression and what are the different compression format supported?

301

What is job tracker in Hadoop?

546

Explain the common input formats in hadoop?

515

What is the number of default partitioner in hadoop?

474

What are the important differences between apache and hadoop?

738

Mention what is the meaning of broker in kafka?

547

Explain HCatalog Architecture in Brief?

How many times combiner is called on a mapper node in Hadoop?

701

How is spark sql different from hql and sql?

283

Why do we perform partitioning in Hive?

792

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