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?

661

Enlist all Apache Kafka Operations?

588

State Disadvantages of Apache Kafka?

660

Explain some Kafka Streams real-time Use Cases?

566

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

609

Un-Answered Questions { Hadoop }

Compare Spark vs Hadoop MapReduce

340

What is a record reader?

450

Can you explain textinformat?

540

How can we launch a tajo cluster?

What are the default record and field delimiter used for hive text files?

864

What is kafka message?

543

Can we say cogroup is a group of more than 1 data set?

780

What are the basic steps to writing a UDF Function in Pig?

735

What are roles in cqlsh?

What is catalyst query optimizer in apache spark?

306

How do I try impala out?

What are barriers?

What is cassandra used for?

explain apache hbase?

153

Can you join multiple fields in Apache

576

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