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 happens if the quantity of the reducer is 0 in mapreduce?

639

Clarify what combiners are and when you should utilize a combiner in a map reduce job?

642

Clarify what is shuffling in map reduce?

683

What are the fundamental configurations parameters specified in map reduce?

674

What combiners are and when you should utilize a combiner in a map reduce job?

656

What are the four essential parameters of a mapper?

700

What does rack awareness mean?

453

What the information segments utilized by hadoop are?

446

Clarify what a task tracker is in hadoop?

472

How ordering in hdfs is finished?

471

Clarify what is sequence file input format?

566

How job tracker schedules an assignment?

456

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

470

What is the most widely recognized info formats characterized in hadoop?

479

Clarify what webdav is in hadoop?

505

Un-Answered Questions { Hadoop }

Tunable consistency is supported by Cassandra. Explain.

How to perform the inter-cluster data copying work in HDFS?

What is the difference between Spark Transform in DStream and map ?

305

What do you understand by Thrift?

Does spark need hadoop?

303

Define parquet file format? How to convert data to parquet format?

340

What all tasks you can perform for managing services using Ambari service tab?

List out the various advantages of dataframe over rdd in apache spark?

318

What is table in hbase?

208

Data Engineer Given a list of followers in the format:123, 345234, 678345, 123â€¦Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?

778

Explain textFile Vs wholeTextFile in Spark?

440

Explain about the basic parameters of mapper and reducer function

1099

What are the Features of Hadoop?

559

What do you understand by mem-table in cassandra?

Explain how can you change a column data type in Hive?

737

For More Un-Answered { Hadoop } Questions Click Here