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

Mention how many inputsplits is made by a hadoop framework?

580

Explain what is jobtracker in hadoop? What are the actions followed by hadoop?

410

Explain is it possible to search for files using wildcards?

481

Explain what is hadoop?

438

Explain what is sequencefileinputformat?

460

Mention how hadoop is different from other data processing tools?

411

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

442

Mention what is rack awareness?

387

Mention what is the difference between an rdbms and hadoop?

424

Mention what are the three modes in which hadoop can be run?

422

Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?

616

Explain what is storage and compute nodes?

515

Explain how jobtracker schedules a task?

471

Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?

439

What happens in text format?

441

Un-Answered Questions { Hadoop }

how you can improve the throughput of a remote consumer?

609

Explain what is kafka?

541

Does spark sql use hive?

275

When NameNode enter in Safe Mode?

Why Hive is not suitable for OLTP systems?

741

How does NameNode tackle DataNode failures?

1181

Give some advantages of Cassandra?

Define composite type in Cassandra?

what is the traditional method of message transfer?

679

Define a udf?

425

What are the port numbers of namenode?

426

What is a map in pig?

578

What is the use of checkpoints in spark?

322

What is the difference between persist() and cache()?

323

What is shuffling and sorting in mapreduce?

646

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