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

How can you set an arbitrary number of Reducers to be created for a job in Hadoop?

509

Give examples of some companies that are using Hadoop structure?

476

Which modes can Hadoop be run in? List a few features for each mode?

509

How analysis of Big Data is useful for organizations?

530

What does the file hadoop-metrics.properties do?

536

Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?

501

How will you write a custom partitioner for a Hadoop job?

500

Give me the examples of Columnar database ?

627

What are 'slaves' and 'masters' in Hadoop?

477

What is Fault Tolerance?

570

What is the basic difference between traditional RDBMS and Hadoop?

483

What are the common types of NOSQL data bases ?

483

Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?

474

How does speculative execution work in Hadoop?

487

What is Federation?

463

Un-Answered Questions { Hadoop }

Can you explain worker node?

415

What do you mean by Persistence?

330

What is spark master?

353

What co-group does in Pig?

669

What do you mean by logging in cassandra?

What happens if the preferred replica is not in the isr?

615

What is OutputCommitter?

866

Explain what happens if you alter the block size of a column family on an already occupied database?

174

How should you handle session_expired?

Is impala intended to handle real time queries in low-latency applications or is it for ad hoc queries for the purpose of data exploration?

Give key features of any NoSQL database?

106

List some use cases of apache kafka?

526

How to write MapReduce Programs?

765

What is Apache Kafka?

595

Explain about the different types of join in Hive?

865

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