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

How to add the partition in existing table without the partition table?

704

How do you list all databases whose name starts with p?

699

Is there a date data type in Hive?

750

What do you mean by schema on reading?

721

Can a table be renamed in Hive?

736

What is throughput? How does HDFS provide good throughput?

File permissions in HDFS?

What is Hadoop HDFS – Hadoop Distributed File System?

How to change the replication factor of data which is already stored in HDFS?

What is Block in HDFS?

How to copy a file into HDFS with a different block size to that of existing block size configuration?

Can multiple clients write into an HDFS file concurrently?

Why is block size set to 128 MB in Hadoop HDFS?

110

Does HDFS allow a client to read a file which is already opened for writing?

How HDFS client divide the file into the block while storing inside HDFS?

Un-Answered Questions { Hadoop }

What is a spark standalone cluster?

248

What is HBase?

359

What is identity mapper and chain mapper?

673

Can we say a COGROUP is a group of more than 1 data set?

555

What is streaming in Hadoop?

438

State the difference between Spark SQL and Hql

357

Explain the process of spilling in Hadoop MapReduce?

637

What are the important differences between apache and hadoop?

712

Explain the term paired RDD in Apache Spark?

404

What is document store db?

Which command is available to show the current HBase user?

161

What is the roadmap for apache driver version one.0?

What are the other components of ambari that are important for automation and integration?

What are the 2 types of table in hive?

683

What are the other components of Cassandra?

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