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 happen on the namenode when a client tries to read a data file?

461

What is replication factor?

431

If the hadoop administrator needs to make a change, which configuration file does he need to change?

442

What is distributed copy (distcp)?

482

What is the role of the secondary namenode?

441

Are there any special requirements for namenode?

425

is there a standard procedure to deploy hadoop?

423

What happen if a datanode loses network connection for a few minutes?

589

What is the procedure for namenode recovery?

454

How would an hadoop administrator deploy various components of hadoop in production?

422

What happen if one of the datanodes has much slower cpu?

431

After increasing the replication level, I still see that data is under replicated. What could be wrong?

459

Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?

445

What is the difference between a hadoop database and relational database?

453

Can we deploye job tracker other than name node?

659

Un-Answered Questions { Big Data }

What is the jobtracker and what it performs in a hadoop cluster?

637

Mention what is distributed cache in hadoop?

440

What operations does rdd support?

278

Where is hadoop-env.sh file present?

484

What is a topic in kafka?

480

Explain about the different cluster managers in Apache Spark

328

Is the keyword 'DEFINE' like a function name?

952

Explain why to use hbase?

157

What is the significance of Sliding Window operation?

308

What is the function of ApplicationMaster?

966

Define partitions in apache spark.

2176

Does Cassandra works on Windows?

What is presto verifier?

How can you launch Spark jobs inside Hadoop MapReduce?

314

What is FlumeNG?

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