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?

320

What is the significance of Sliding Window operation?

294

Why is BlinkDB used?

283

What is the advantage of a Parquet file?

314

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

380

What do you understand by SchemaRDD?

305

How can you achieve high availability in Apache Spark?

419

Define a worker node?

433

Name a few companies that use Apache Spark in production?

321

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

313

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

261

What does the Spark Engine do?

307

How Spark uses Akka?

299

How Spark handles monitoring and logging in Standalone mode?

326

What is Hadoop serialization?

Capital One,

640

Un-Answered Questions { Hadoop }

What is spark vectorization?

305

What are the different tasks we can perform managing host using ambari host tab?

Define compaction in HBase?

164

Why is block size set to 128 MB in Hadoop HDFS?

What is difference between spark and scala?

255

Can you define serde in hive?

632

How should 'store' keyword is useful in pig scripts?

613

What is a column family?

Main Components of Hadoop?

726

When to use Cassandra?

124

What is metastore?

594

What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

481

What is the role of JDBC driver in Sqoop?

How will you explain COGROUP in Pig?

558

Explain the usage of Context Object?

440

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