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

What do we mean by Partitions or slices?

297

How can you store the data in spark?

332

What are the advantages of DataFrame?

322

What are the components of Spark Ecosystem?

318

How is data represented in Spark?

326

What is the difference between Spark Transform in DStream and map ?

305

Explain various level of persistence in Apache Spark?

316

What are benefits of DataFrame in Spark?

345

What are the various programming languages supported by Spark?

371

What is accumulator?

346

Explain different transformation on DStream?

288

What are Paired RDD?

331

Name some sources from where Spark streaming component can process real-time data?

307

What is meant by in-memory processing in Spark?

323

Explain what are the various types of Transformation on DStream?

290

Un-Answered Questions { Hadoop }

What is the default port of presto?

What is the roadmap for apache mahout version 1.0?

Explain how can you change a column data type in Hive?

744

How does hadoop achieve fault tolerance?

452

Explain some Advantages of Avro?

122

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

312

How can I import large objects (BLOB and CLOB objects) in Apache Sqoop?

explain Metadata in Namenode?

982

What are the limitations of Hadoop?

618

What is Shuffling and Sorting in a MapReduce?

718

Define Partition in Apache Spark?

326

State the difference between persist() and cache() functions.

333

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

Clarify the NoSQL Database?

What is the full form of MSLAB?

231

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