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

Can you explain combiner?

446

List of some best tools that can be useful for data-analysis?

436

What is the best practice to deploy the secondary name node?

459

What are the tools used in big data?

441

Can you explain indexing?

421

Can you define a checkpoint?

477

Which language is more suitable for text analytics? R or python?

439

Can you explain commodity hardware?

420

How can native libraries be included in yarn jobs?

488

How to do ‘map’ and ‘reduce’ works?

578

Can you explain bloommapfile.

459

Why is checkpointing important in hadoop?

475

What happens when two clients try to access the same file in the hdfs?

462

What do you know about the speculative execution?

466

What are the differences between hadoop 1 and hadoop 2?

442

Un-Answered Questions { Hadoop }

What is Flatten?

566

What is your favourite tool in the hadoop ecosystem?

975

Define the level of parallelism and its need in spark streaming?

395

What is pig properties?

555

Explain the uses of PIG?

991

How can Flume be used with HBase?

117

When to choose "Internal Table" in Hive?

726

What is Kundera in Cassandra?

What is the history of apache mahout? Once did it start?

Why MapReduce uses the key-value pair to process the data?

641

What do you understand by compute and storage nodes?

689

Explain the flatMap operation on Apache Spark RDD?

318

What is the InputFormat ?

1027

What do you mean by column family?

What happens if the block in HDFS is corrupted?

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