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

What does flatten do in pig?

711

Can you join multiple fields in apache pig scripts?

581

Differentiate between piglatin and hiveql?

571

Compare apache pig and sql?

565

What do you know about the case sensitivity of apache pig?

456

Explain about the bloommapfile?

621

Explain about the execution pl of a pig script?
or
differentiate between the logical and physical plan of an apache pig script?

509

How do users interact with the shell in apache pig?

537

What is illustrate used for in apache pig?

594

What are some of the apache pig use cases you can think of?

494

What kinds of impala queries or data are best suited for hbase?

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?

Can I do trforms or add new functionality?

Why does my insert statement fail?

Is impala production ready?

Un-Answered Questions { Hadoop }

Where is table data stored in Apache Hive by default?

809

What are the key elements in ZooKeeper Architecture?

Explain the term sstables?

What do shuffling do?

670

Describe SPM?

What is Disk Balancer in Hadoop?

511

What are the 2 modes used to run pig scripts?

620

Name some AVRO Reference APIs?

Explain how can we check whether namenode is working or not?

569

Explain textFile Vs wholeTextFile in Spark?

432

What is difference between coalesce and repartition?

361

Name the most common input formats defined in hadoop?

443

Define actions in spark.

2242

Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

613

What are znodes?

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