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

Different Running Modes of Apache Spark

318

How will you calculate the number of executors required to do real-time processing using Apache Spark? What factors need to be considered for deciding on the number of nodes for real-time processing?

316

List the popular use cases of Apache Spark?

305

What is Spark.executor.memory in a Spark Application?

313

Compare Hadoop and Spark?

341

What is write ahead log(journaling) in Spark?

443

What are Actions?

332

What are the limitations of Spark?

304

What is a reliable and unreliable receiver in Spark?

339

In a given spark program, how will you identify whether a given operation is Transformation or Action ?

361

Can you list down the limitations of using Apache Spark?

326

Can you use Spark for ETL process?

300

What are the disadvantages of using Spark?

334

Where does Spark Driver run on Yarn?

304

Explain the terms Spark Partitions and Partitioners?

314

Un-Answered Questions { Hadoop }

Explain cassandra data model?

What is CTE Table in Hive?

796

What is flume interceptor?

How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?

726

What is the use of coordinator node in read?

What is the use of get() method?

158

What is zookeper?

What is the basic difference between traditional RDBMS and Hadoop?

482

How to drop database in apache tajo?

What is apache presto?

Name the types of tunable consistency?

It can be possible that a Job has 0 reducers?

1013

Do streamers make money from sparks?

292

How to compress mapper output in Hadoop?

739

What are the different collection type in Hive?

750

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