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 about Hadoop file system and processing framework?

432

How Hadoop is cost-effective?

419

What does the mapred.job.tracker command do?

434

Is it possible to rename the output file, and if so, how?

469

What are the Hadoop features extended to its eco-system components ?

446

What is job tracker in Hadoop?

507

What sorts of actions does the job tracker process perform?

428

What are the main components in Hadoop Eco-System and what are their functions ?

498

Name the most common Input Formats defined in Hadoop? Which one is default?

468

What is the block size in Hadoop?

443

Can you give some examples of Big Data?

484

After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?

482

What is streaming in Hadoop?

443

What is a commodity hardware? Does commodity hardware include RAM?

522

What is streaming access?

500

Un-Answered Questions { Hadoop }

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

432

Mention what are the most common input formats defined in hadoop?

446

What does ambari shell can provide?

What is shuffle spill in spark?

283

Tell any two features of flume?

116

What types of costs are associated in creating index on hive tables?

847

What is spark vs hadoop?

283

Explain is it possible to search for files using wildcards?

487

How do reducers communicate with each other?

676

How to write a custom partitioner for a Hadoop MapReduce job?

660

What is a spill factor with respect to the ram?

881

Can you explain difference between apache mahout and apache spark’s mllib?

Define the consistency levels for read operations in Cassandra?

Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

764

Can you explain apache ambari?

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