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 }

Define Partition and Partitioner in Apache Spark?

318

Since the data is replicated thrice in hdfs, does it mean that any calculation done on one node will also be replicated on the other two?

How does cassandra perform write operations?

What is difference between client and cluster mode in spark?

403

What is the problem with the small file in Hadoop?

689

What is SparkContext in Apache Spark?

331

Mention what is the meaning of broker in kafka?

543

What is the difference between like and rlike operators in hive?

797

State about ZooKeeper WebUI?

What is spark in big data?

318

What are the benefits of using Spark with Apache Mesos?

301

State some key Points about Apache Avro?

How to explain Bigdatadeveloper projects

604

Explain Reliability and Failure Handling in Apache Flume?

108

What does flatten do in pig?

773

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