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

When running Spark applications, is it necessary to install Spark on all the nodes of YARN cluster?

343

What is the significance of Sliding Window operation?

320

Why is BlinkDB used?

311

What is the advantage of a Parquet file?

340

What are the key features of Apache Spark that you like?

405

What do you understand by SchemaRDD?

330

How can you achieve high availability in Apache Spark?

451

Define a worker node?

469

Name a few companies that use Apache Spark in production?

345

What is the difference between persist() and cache()?

335

Which spark library allows reliable file sharing at memory speed across different cluster frameworks?

275

What does the Spark Engine do?

333

How Spark uses Akka?

332

How Spark handles monitoring and logging in Standalone mode?

347

What is Hadoop serialization?

Capital One,

748

Un-Answered Questions { Hadoop }

What is dag spark?

345

State some disadvantages of impala?

What is the input type/format in MapReduce by default?

1124

What happen when namenode enters in safemode in hadoop?

470

What is small file problem in hadoop?

827

What is spark architecture?

284

When running Spark applications, is it necessary to install Spark on all the nodes of YARN cluster?

343

What is metadata storage service in bookkeeper?

Which language is better for spark?

313

How can we have to see the all hosts that are available in the ambari?

Explain Spark leftOuterJoin() and rightOuterJoin() operation?

313

What is the History of Cassandra Database ?

Explain about the major libraries that constitute the Spark Ecosystem?

433

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

361

What is bookkeeper?

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