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

Can you give us some more details about ssh communication between masters and the slaves?

735

Can you tell us more about ssh?

760

What is shark?

299

Name a few commonly used spark ecosystems?

303

What is hive on spark?

403

Can we do real-time processing using spark sql?

322

How sparksql is different from hql and sql?

511

What is a parquet file?

304

How to split single hdfs block into partitions rdd?

How does data transfer happen from hdfs to hive?

155

What is non-dfs used in hdfs web console

If the source data gets updated every now and then, how will you synchronize the data in hdfs that is imported by sqoop?

162

How to use hdfs put command for data transfer from flume to hdfs?

What are tools available to send the streaming data to hdfs?

how does hdfs ensure data integrity of data blocks stored in hadoop hdfs?

Un-Answered Questions { Hadoop }

What are nodes and ephemeral nodes?

What is hive installation path?

788

what is partitions in hive?

727

Does hdfs enable a customer to peruse a record, which is already opened for writing?

Which Sorting algorithm is used in Hadoop MapReduce?

636

Does Apache Spark provide checkpoints?

304

Define Thrift in Apache Cassandra?

what is "map" and what is "reducer" in Hadoop?

681

Clarify what is sqoop in hadoop?

462

What do you mean by Free Form Import in Sqoop?

What do you understand by Executor Memory in a Spark application?

483

When should you use sequencefileinputformat?

710

Explain the role of the offset?

568

Define a udf?

466

What is driver memory and executor memory in spark?

346

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