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 impala?

130

Why we need impala hadoop?

What is the maximum number of rows in a table?

Describe impala shell (impala-shell command)?

Can any impala query also be executed in hive?

State some advantages of impala?

Does impala use caching?

How are joins performed in impala?

103

What are distinct operators in impala?

What is troubleshooting for impala?

Can impala be used for complex event processing?

169

How do I configure hadoop high availability (ha) for impala?

How do I know how many impala nodes are in my cluster?

160

What are the differences between relational databases and impala?

On which hosts does impala run?

Un-Answered Questions { Hadoop }

What are the different components of a Hive architecture?

837

What is safe mode in Hadoop?

960

Have you ever used counters in hadoop?

421

Define Partition and Partitioner in Apache Spark?

303

Explain why to use hbase?

157

What is the primary purpose of flume in the hadoop architecture?

875

What is the use of foreach operation in Pig scripts?

594

Tell something about the query language used in Cassandra Database?

Explain what is wal and hlog in hbase?

312

Explain the concept of bloom filter?

What are the relation operations in Pig? Explain any two with examples?

712

What do you understand by cassandra?

What is a bloom filter?

162

What is Cassandra Data Modelling ?

What are the common mistakes developers make when running Spark applications?

284

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