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 the job tracker role in hadoop?

395

Explain how do you overwrite replication factor?

413

Explain how can we check whether namenode is working or not?

535

Define a udf?

382

Define a sequence file in hadoop?

507

Name the operating system(s) which are supported for production hadoop deployment?

410

Explain in which directory hadoop is installed?

430

List of the some best tools that can be useful for data-analysis?

418

Explain the difference between an inputsplit and a block?

393

What is the use of cloudera?

408

Explain about the indexing process in hdfs?

Explain what is difference between an input split and hdfs block?

Replication causes data redundancy then why is pursued in hdfs?

Since the data is replicated thrice in hdfs, does it mean that any calculation done on one node will also be replicated on the other two?

If a particular file is 50 mb, will the hdfs block still consume 64 mb as the default size?

Un-Answered Questions { Big Data }

How to create table in hive for a json input file?

778

How does gossip protocol help in failure detection?

What is executor memory in a spark application?

297

How does spark run hadoop?

270

Name different types of the data model?

What is HDFS ? How it is different from traditional file systems?

890

Do we need to place 2nd and 3rd data in rack 2 only?

421

Is it possible to create cartesian join between 2 tables, using hive?

643

How to restart Namenode?

710

Is spark written in java?

302

What are the common mistakes developers make when running Spark applications?

274

How to create custom key and custom value in MapReduce Job?

572

Explain future growth of Apache Ambari?

Is apache spark part of hadoop?

287

What is the usefulness of the distributed by clause in hive?

698

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