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Hadoop General Interview Questions
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What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?

 280

What are the configuration files in Hadoop?

 249

Compare Apache Hadoop and Apache Spark?

 229

What are the different modes in which we can configure/install Hadoop?

 245

Explain how Hadoop cluster hardware planning and provisioning is done?

 277

How to create a user in Hadoop?

 228

What are the major differences between Hadoop 2 and Hadoop 3?

 238

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

 295

How to specify more than one path for storage in Hadoop?

 257

What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?

 266

What is JPS? Why is it used in Hadoop?

 241

What is the key difference between NameNode and DataNode in Hadoop?

 245

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

 244

Ideally what should be replication factor in a Hadoop cluster?

 258

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

 282

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Un-Answered Questions { Hadoop General }

Define “speculative execution” in hadoop?

239

If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

242

Explain InputSplit in Hadoop?

239

Clarify what webdav is in hadoop?

223

Give me examples of unstructured data?

249




Whats the default port that jobtrackers listens ?

281

what is next step after mapper or maptask?

228

Can you explain speculative execution?

231

Mention what is rack awareness?

225

What are the main components of hadoop?

227

Can you explain bloommapfile.

236

Define a record reader?

228

What are the different modes in which we can configure/install Hadoop?

245

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

268

What is 'jps'?

243

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