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 are the key segments of hive architecture?

638

Say what the object inspector functionality is in hive?

714

What is the major difference between local and remote meta-store?

869

Clarify how hive de-serialize and serialize the information?

611

What is the utilization of hcatalog?

646

What are the various uses of explode hive?

637

Say when to pick “inward table” and “outside table” in hive?

658

What do hive variable means? How can we utilize it?

563

What in hive made out of?

652

Specify the different types of tables accessible in hive?

743

Clarify about the smb join in hive?

623

What is the throughput? How does hdfs give great throughput?

How does hdfs ensure information integrity of data blocks squares kept in hdfs?

What do you mean by block scanner in hdfs?

What do you mean by meta information in hdfs? List the documents related to metadata.

Un-Answered Questions { Hadoop }

How is impala metadata managed?

What is HBase HMaster?

354

Which one is the master node in HDFS? Can it be commodity hardware?

Is there any difference between HBase datamodel and RDBMS datamodel?

1089

Give the data storage units in Cassandra?

Knox and Hadoop Development Tools?

879

What is the syntax of describe Command?

292

Explain Spark SQL caching and uncaching?

310

How to process data using Transformation operation in Spark?

285

Explain Spark leftOuterJoin() and rightOuterJoin() operation?

276

What is the concept of SuperColumn in Cassandra?

What is off heap memory in spark?

291

What do you mean by ss table and explain how it is different from the other original tables?

How to change a column data type in Hive?

648

Is it possible to rename the output file?

741

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