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

Which all languages Apache Spark supports?

359

explain the concept of RDD (Resilient Distributed Dataset). Also, state how you can create RDDs in Apache Spark.

424

What advantages does Spark offer over Hadoop MapReduce?

317

Why is Spark RDD immutable?

383

What are the types of Apache Spark transformation?

304

What is Spark Core?

321

Why Apache Spark?

335

Explain transformation and action in RDD in Apache Spark?

307

How can we create RDD in Apache Spark?

316

What is SparkSession in Apache Spark?

307

What is the Difference SparkSession vs SparkContext in Apache Spark?

431

What are the abstractions of Apache Spark?

317

What is SparkContext in Apache Spark?

331

What are the components of Apache Spark Ecosystem?

413

Explain the RDD properties?

333

Un-Answered Questions { Hadoop }

Can we run unix shell commands from hive? Give example?

729

What is the meaning of speculative execution in Hadoop? Why is it important?

1092

What is the use of spark?

288

How does master slave architecture in the hadoop?

882

how Cassandra writes changed data into commitlog?

105

Explain plucktuple?

612

When should you use cassandra?

106

What does the following query do? Insert overwrite table employees partition (country, state) select ..., Se.cnty, se.st from staged_employees se;

964

What does impala do for fast access?

Can you add or remove Column Families in a working Cluster?

What are the different types of primary key?

Explain the Use of Hive?

746

What is lambda in spark?

321

how to share the metastore within multiple users?

969

Can you explain spark core?

282

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