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

Name some internal daemons used in spark?

379

Name the two types of shared variable available in Apache Spark?

312

Explain distnct(),union(),intersection() and substract() transformation in Spark?

337

Explain Accumulator in Spark?

467

What is Speculative Execution in Apache Spark?

304

Name three data source available in SparkSQL

319

Is it possible to use Apache Spark for accessing and analyzing data stored in Cassandra databases?

315

Can you explain how you can use Apache Spark along with Hadoop?

323

Explain Dsstream with reference to Apache Spark

408

What is the role of Driver program in Spark Application?

290

Define the term ‘Lazy Evolution’ with reference to Apache Spark

316

What are the benefits of Spark lazy evaluation?

336

State the difference between Spark SQL and Hql

367

Can I run Apache Spark without Hadoop?

302

Please explain the sparse vector in Spark.

304

Un-Answered Questions { Hadoop }

What is spark in big data?

318

Where is hadoop-env.sh file present?

537

Explain about the execution plans of a Pig Script? Or Differentiate between the logical and physical plan of an Apache Pig script?

650

Explain the Job OutputFormat?

1002

What is the use of Bloom Filter in Cassandra?

129

What is apache spark and what is it used for?

346

What are the components of Apache Spark Ecosystem?

413

Mention Hadoop core components?

727

What is Spark SQL?

325

Explain Hadoop streaming?

514

What is a RecordReader in Hadoop MapReduce?

724

Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?

488

What happens if there is an error in impala?

259

Why do we need MapReduce during Pig programming?

713

How does gossip protocol work?

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