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

Is kafka an etl tool?

255

What language is apache kafka written in?

278

What is zookeeper server?

What is the difference between map and reduce?

342

What is optimal size of a file for distributed cache?

366

What can skew the mean?

186

What is vectorized query execution?

215

What is map side join?

185

What does dag stand for?

199

What is data ingestion pipeline?

184

What is the difference between reducebykey and groupbykey?

201

What is data skew and how do you fix it?

211

Is databricks a database?

212

Is databricks an etl tool?

187

What is a databricks cluster?

281

Un-Answered Questions { Hadoop }

What is the Use of Cassandra Database ?

Difference Between Hadoop and HDFS?

What are different types of filesystem?

807

Explain task granularity

343

Who divides the file into Block while storing inside hdfs in hadoop?

What is the difference between kafka and mq?

268

What do you mean by Free Form Import in Sqoop?

Define NoSQL Database?

What are the different ways of executing Pig script?

411

What is difference between spark and scala?

177

What will be the output of cast ('XYZ' as INT)?

420

What are the important modes of hadoop?

234

Explain HCatOutputFormat?

What is apache spark in big data?

184

What are the exact differences between reduce and fold operation in Spark?

283

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