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

List the various components in kafka?

569

Mention what is the maximum size of the message does kafka server can receive?

576

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

522

You have a file employee.txt in the hdfs directory with 100 records. You want to see only the first 10 records from the employee.txt file. How will you do this?

1004

I have a relation r. How can I get the top 10 tuples from the relation r?

625

What is presto verifier?

What is jmx connector?

What are the presto applications?

What are the log files of the presto server?

Why should we use presto?

What is the use of mysql connector?

How can we create table by using command?

What are the various data types in presto?

What are the features of presto?

What is the default port of presto?

Un-Answered Questions { Hadoop }

How data or file is read in Hadoop HDFS?

Explain Spark Streaming with Socket?

345

What is the message broker?

522

How many Daemon processes run on a Hadoop system?

1136

Can you list down the limitations of using Apache Spark?

326

What do you know about sequencefileinputformat?

670

If I create a folder in HDFS, will there be metadata created corresponding to the folder? If yes, what will be the size of metadata created for a directory?

How can you send large messages with kafka (over 15mb)?

543

Cassandra is written in which language?

106

Does cassandra support acid tractions?

Explain the concept of compaction in Cassandra?

What do you understand by the super column in cassandra?

what is next step after mapper or maptask?

461

How much space will the split occupy in Mapreduce?

729

What are the benefits of block transfer?

1038

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