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?

752

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

740

Is there a date data type in Hive?

783

What do you mean by schema on reading?

765

Can a table be renamed in Hive?

777

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?

154

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 }

How to Delete directory from HDFS?

What is the difference between Caching and Persistence in Apache Spark?

335

How is indexing done in Hadoop HDFS?

What is secondary namenode? Is it a substitute or back up node for the namenode?

Can any impala query also be executed in hive?

how Hadoop is different from other data processing tools?

698

What are the various diagnostic operators available in Apache Pig?

772

Is it possible to create multiple table in hive for same data?

728

Explain sortbykey() operation?

300

Is spark distributed computing?

316

Tell any two features of flume?

116

What we need to be taken care while adding a column?

102

What is the latest version of ambari that is available in the present market?

Name the scalar data type and complex data types in Pig?

706

Map reduce jobs take too long. What can be done to improve the performance of the cluster?

748

For More Un-Answered { Hadoop } Questions Click Here