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

Big Data Interview Questions

Questions Answers Views Company eMail

What is spark deploy mode?

286

What is a dataframe spark?

221

How do you integrate spark and hive?

295

Can spark be used without hadoop?

253

What is lambda architecture spark?

302

What is difference between client and cluster mode in spark?

355

What is apache spark in big data?

254

What is apache spark and what is it used for?

310

What is the difference between cache and persist in spark?

319

What is executor memory in spark?

300

What is master node in spark?

280

What is difference between dataset and dataframe in spark?

299

What is lineage graph in spark?

267

Why do we use persist () on links rdd?

270

What is dataframe in spark?

263

Un-Answered Questions { Big Data }

What are the main methods of data transferring in hadoop sqoop?

Agent communicate with other Agents?

Compare Hadoop and RDBMS?

386

Name different types of NoSQL database?

How is the processing of streaming data achieved in Apache Spark? Explain.

268

If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?

663

What is a column family in Cassandra?

What is serialization in spark?

292

What are the 2 types of table in hive?

623

Explain the overview of hadoop history breifly?

565

Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

591

How does hdfs get a good throughput?

Mention the difference between hbase and relational database?

157

What are the different types of Znodes?

939

What is the InputFormat ?

958

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