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 is simple strategy?

133

Why is jconsole used? What is it’s different elements?

What is jmx? And how is it useful in cassandra?

What are the different types of data model?

How does cassandra perform write operations?

Why is cqlsh used?

135

What are tokens in cassandra?

What is a column family?

Explain the terms memtable, commitlog and sstables.

What is hinted handoff?

What are the key features of any nosql database?

What is column store db?

Differentiate between drop and truncate in cqlsh

What is a yaml file in cassandra?

What is anti-entropy and how is it associated with merkel tree?

Un-Answered Questions { Hadoop }

How does apache flume work?

132

Mention if we can name view same as the name of a Hive table?

690

What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

528

Explain what is the function of mapreduce partitioner?

643

When to use –target-dir and when to use –warehouse-dir while importing data?

How to create a user in Hadoop?

494

What is ColumnFamily?

Which command is used for the retrieval of the status of daemons running the hadoop cluster?

718

How can you stop a partition form being queried?

769

Explain transformation in rdd. How is lazy evaluation helpful in reducing the complexity of the system?

346

What is tungsten engine in spark?

318

What exactly is apache spark?

297

Explain slot in Hadoop Map-Reduce v1?

690

Explain what is sequencefileinputformat?

460

Compare Apache Hadoop and Apache Spark?

452

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