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 catalyst query optimizer in apache spark?

195

What are the various types of shared variable in apache spark?

183

Define the common faults of the developer while using apache spark?

197

What is the use of spark driver, where it gets executed on the cluster?

213

What is speculative execution in spark?

235

Explain write ahead log(journaling) in spark?

186

Explain values() operation in apache spark?

270

Define the level of parallelism and its need in spark streaming?

232

Define sparksession in apache spark? Why is it needed?

198

Describe different transformations in dstream in apache spark streaming?

202

In hadoop_pid_dir, what does pid stands for?

238

What are the network requirements for hadoop?

252

What does hadoop-env.sh do?

244

Which are the three modes in which hadoop can be run?

249

Where is hadoop-env.sh file present?

234

Un-Answered Questions { Big Data }

What is spark databricks?

198

How to set which framework would be used to run mapreduce program?

402

How will you update the rows that are already exported?

How can you compare Hadoop and Spark in terms of ease of use?

194

What is the difference between spark and python?

190

Why ‘Reading‘ is done in parallel and ‘Writing‘ is not in HDFS?

Have you ever used counters in hadoop?

231

What do the master class and the output class do?

386

Explain what is jobtracker in hadoop? What are the actions followed by hadoop?

219

Explain JobConf in MapReduce.

515

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

What is network topology strategy?

Explain about the bloommapfile?

345

What is the difference between TextInputFormat and KeyValueInputFormat class?

227

What are barriers?

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