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

Big Data Interview Questions

Questions Answers Views Company eMail

By Default, how many partitions are created in RDD in Apache Spark?

302

What are broadcast variables in Apache Spark? Why do we need them?

312

Is it necessary to start Hadoop to run any Apache Spark Application ?

280

What is write ahead log(journaling)?

310

Does Apache Spark provide checkpoints?

284

What is Apache Spark Machine learning library?

314

What is the use of map transformation?

312

Explain the run-time architecture of Spark?

296

List the advantage of Parquet files?

301

Name the Spark Library which allows reliable file sharing at memory speed across different cluster frameworks.

308

Please provide an explanation on DStream in Spark.

282

List the languages supported by Apache Spark?

313

Explain the Parquet File format in Apache Spark. When is it the best to choose this?

361

Explain lineage graph

320

Is the following approach correct? Is the sqrt Of Sum Of Sq a valid reducer?

451

Un-Answered Questions { Big Data }

Explain Alter Table Statement in HCatalog?

What is the process for starting a Kafka server?

592

What is the relationship between Jobs and Tasks in Hadoop?

617

Why does hive not store metadata information in hdfs?

Give the name of some components of Cassandra?

What do you understand by Filters in HBase?

143

Can you join multiple fields in apache pig scripts?

581

Give examples of the SerDe classes whihc hive uses to Serializa and Deserilize data?

734

Explain is it possible to search for files using wildcards?

478

What are the different zkclientbindings?

How NameNode tackle Datanode failures in Hadoop?

463

What do you mean by schema on reading?

713

Hadoop sqoop is which type of tool?

Where is the Mapper Output intermediate kay-value data stored ?

1354

How do you deal with sparse data?

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