Hadoop General Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Hadoop General Interview Questions

Questions Answers Views Company eMail

What are configuration files in Hadoop?

521

What are the limitations of Hadoop?

570

Compare Hadoop 2 and Hadoop 3?

424

Explain Data Locality in Hadoop?

536

What is the problem with small files in Hadoop?

526

How is security achieved in Hadoop?

523

Why does one remove or add nodes in a Hadoop cluster frequently?

695

What is throughput in Hadoop?

534

How to restart NameNode or all the daemons in Hadoop?

542

What does jps command do in Hadoop?

652

What is fsck?

643

How to debug Hadoop code?

538

Explain Hadoop streaming?

479

What does hadoop-metrics.properties file do?

529

How Hadoop’s CLASSPATH plays a vital role in starting or stopping in Hadoop daemons?

422

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Un-Answered Questions { Hadoop General }

Give me the examples of Columnar database ?

586

What is Rack Awareness? What is its need in Hadoop?

532

What is Small File Problem in Hadoop? How can it be resolved?

539

Why is Data Block size set to 128 MB in Hadoop?

439

What are the main components in Hadoop Eco-System and what are their functions ?

494

What is the difference between TextInputFormat and KeyValueInputFormat class?

501

What is job tracker in Hadoop?

500

What is the use of cloudera?

448

How job tracker schedules an assignment?

413

What is the block size in Hadoop?

435

How does speculative execution work in Hadoop?

435

Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

445

What kind of hardware is best for hadoop?

418

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

540

What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?

434

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