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

what does /*streamtable(table_name)*/ do?

818

what is (HS2) HiveServer2?

729

Explain how cassandra delete data?

102

Mention what needs to be taken care while adding a column?

Mention when you can use alter keyspace?

Define memtable?

Explain how cassandra writes data?

Explain what is memtable in cassandra?

Explain cap theorem?

105

What are the Difference between MongoDB and Cassandra?

What is the function of Cluster.Builder class in Cassandra?

147

What is SSTable? How is it different from other relational tables?

122

How does Cassandra write?

Explain the concept of bloom filter?

Explain the concept of Tunable Consistency in Cassandra?

202

Un-Answered Questions { Hadoop }

Explain the two types of compactions in Cassandra.

137

In hadoop_pid_dir, what does pid stands for?

576

How can you remove the elements with a key present in any other RDD?

311

What is a bloom filter?

170

Does spark load all data in memory?

360

Can you explain benefits of spark over mapreduce?

310

What is difference between spark and kafka?

313

List some benefits of apache kafka?

594

what is (HS2) HiveServer2?

729

What are clusters in cassandra?

How do you write your own custom SerDe ?

778

What is the difference between Hadoop and Traditional RDBMS?

960

What is the difference between HDFS block and input split?

946

Is kafka a message queue?

597

What is flatmap in apache spark?

340

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