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

Explain what is shuffling in mapreduce?

459

Explain what is distributed cache in mapreduce framework?

468

Mention what are the main configuration parameters that user need to specify to run mapreduce job?

571

Explain what is the function of mapreduce partitioner?

477

Explain what is heartbeat in hdfs?

Explain what is a difference between an input split and hdfs block?

Explain how indexing in hdfs is done?

Mention what is the best way to copy files between hdfs clusters?

Mention what is the difference between hdfs and nas?

What is a difference between an input split and hdfs block?

Mention what is the data storage component used by hadoop?

307

Mention what does the text input format do?

303

Mention what daemons run on a master node and slave nodes?

357

Explain what is namenode in hadoop?

315

Explain what is a sequence file in hadoop?

343

Un-Answered Questions { Hadoop }

What is the bag?

379

Compare Hadoop and RDBMS?

305

Explain the features of Apache Spark because of which it is superior to Apache MapReduce?

456

Compare hadoop & spark?

215

Define tasktracker.

492

What does /etc /init.d do?

534

Name several advantages of Apache Ambari?

What are the main classes of Data Transfer API?

Why are spark transformations lazy?

246

Explain HCatInputFormat?

Compare Spark vs Hadoop MapReduce

263

State syntax of the command that is used to drop a partition?

What do you mean by taskinstance?

518

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

236

What is contextual routing in flume?

776

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