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 are the port numbers of job tracker?

555

Explain the key benefits of using storm for real time processing?

462

What is the logistic regression?

477

Define data cleansing?

441

What are the port numbers of namenode?

470

How can we create a hadoop cluster from scratch?

463

What are the port numbers of task tracker?

489

How can you native libraries be included in yarn jobs?

474

Name the files which are used by the startup and shutdown commands?

1 1003

Define a record reader?

452

What is the job tracker role in hadoop?

479

Explain how do you overwrite replication factor?

462

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

617

Define a udf?

467

Define a sequence file in hadoop?

582

Un-Answered Questions { Hadoop }

What is hdfs block size?

What do you know about sequencefileinputformat?

670

What combiners is and when you should use a combiner in a MapReduce Job?

674

What is lazy evaluation and how is it useful?

316

What is the use of foreach operation in Pig scripts?

633

Give a brief overview of Hadoop history?

466

When should you not use Cassandra? OR When to use RDBMS instead of Cassandra?

132

why use hcolumndescriptor class?

153

How does NameNode tackle DataNode failures?

1208

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

Define Spark-SQL?

297

Explain how input and output data format of the hadoop framework?

749

What will apache driver do?

Which language is best for spark?

276

How are joins performed in impala?

103

For More Un-Answered { Hadoop } Questions Click Here