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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

Explain the difference between nas and hdfs?

What is a job tracker?

What is the difference betwaeen mapreduce engine and hdfs cluster?

What is the difference between namenode, backup node and checkpoint namenode?

Is namenode also a commodity?

What does hbase consists of?

181

What are the three types of tombstone markers in hbase?

153

How many operational command in hbase?

183

Explain deletion in hbase?

148

What is the maximum recommended cell size?

174

How to open a connection in hbase?

153

What are the different compaction types in hbase?

172

What is compaction in hbase?

171

What is hotspotting in hbase?

177

What is ttl (time to live) in hbase?

186

Un-Answered Questions { Hadoop }

For a job in Hadoop, is it possible to change the number of mappers to be created?

799

What is pair rdd in spark?

289

What are the storage supported by tajo?

How can you achieve high availability in Apache Spark?

433

Does spark use yarn?

260

Why do people use spark?

274

Can you explain accumulators in apache spark?

315

Explain the architecture of Hadoop Pig?

766

Differentiate between the physical plan and logical plan in Pig script?

780

What is the function of ApplicationMaster?

974

What is a yaml file in cassandra?

Can you define parquet file?

277

What is difference between client and cluster mode in spark?

385

What happens to zk sessions while the cluster is down?

How does apache flume work?

132

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