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

Why HDFS performs replication, although it results in data redundancy in Hadoop?

Can multiple clients write into a Hadoop HDFS file concurrently?

On what basis name node distribute blocks across the data nodes in HDFS?

Why is Reading done in parallel and writing is not in HDFS?

Can multiple clients write into an HDFS file concurrently in hadoop?

How to create Users in hadoop HDFS?

How to transfer data from Hive to HDFS?

Why HDFS stores data using commodity hardware despite the higher chance of failures in hadoop?

What is Hadoop Distributed File System- HDFS?

What is throughput in HDFS?

how you can reduce churn in ISR? When does broker leave the ISR?

664

Enlist all Apache Kafka Operations?

592

State Disadvantages of Apache Kafka?

663

Explain some Kafka Streams real-time Use Cases?

570

what is Zookeeper in Kafka? Can we use Kafka without Zookeeper?

611

Un-Answered Questions { Hadoop }

Explain a scenario where you will be using spark streaming.

1467

File permissions in HDFS?

What happens if the quantity of the reducer is 0 in mapreduce?

650

List out the ways of creating RDD in Apache Spark?

303

State syntax of the command to drop an index?

What is Apache Hadoop YARN?

1499

What is Starvation scenario in spark streaming?

358

Specify the partitions in hive?

697

Can you explain worker node?

415

What is Map() operation in Apache Spark?

383

In a very huge text file, you want to just check if a particular keyword exists. How would you do this using Spark?

416

In which location Name Node stores its Metadata and why?

1428

what are the three modes in which Hadoop can be run?

681

What is the functionality of Query Processor in Apached Hive ?

757

How do I install spark?

291

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