Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

Explain Spark leftOuterJoin() and rightOuterJoin() operation?

300

List out the difference between textFile and wholeTextFile in Apache Spark?

401

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

450

Explain countByValue() operation in Apache Spark RDD?

265

Explain Spark countByKey() operation?

319

What is Starvation scenario in spark streaming?

346

Explain the action count() in Spark RDD?

281

Define the run-time architecture of Spark?

286

What are the languages in which Apache Spark create API?

298

What are the features and characteristics of Apache Spark?

289

Explain Spark streaming?

274

Explain first() operation in Spark?

348

Define fold() operation in Apache Spark?

305

Explain reduceByKey() Spark operation?

300

Explain Spark Streaming with Socket?

323

Un-Answered Questions { Big Data }

Explain how does hbase actually delete a row?

166

What is Row Key?

981

Name all HCatalog Features?

What are producers in kafka?

521

If a Replica stays out of the ISR for a long time, what does it signify?

636

Define "Transformations" in Spark

337

What happens if the quantity of the reducer is 0 in mapreduce?

594

Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?

441

What is lineage graph?

460

What is salary of hadoop developer?

690

What does reduce action do?

280

What happens when two clients try to access the same file on HDFS?

185

How do you overwrite replication factor?

451

What is Spark MLlib?

408

Explain the core methods of the reducer?

511

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