Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

what are the three modes in which Hadoop can be run?

686

How data is spilt in Hadoop?

703

what is storage and compute nodes?

796

When Namenode is down what happens to job tracker?

763

what are the main configuration parameters that user need to specify to run Mapreduce Job ?

661

what is "map" and what is "reducer" in Hadoop?

694

What is Shuffling and Sorting in a MapReduce?

722

What is the difference between Hadoop and RDBMS?

692

how can you check whether Namenode is working beside using the jps command?

737

Illustrate a simple example of the working of MapReduce.

692

For a Hadoop job, how will you write a custom partitioner?

722

what happens when Hadoop spawned 50 tasks for a job and one of the task failed?

751

what is the Hadoop MapReduce APIs contract for a key and value class?

718

When is it suggested to use a combiner in a MapReduce job?

697

What is the process of changing the split size if there is limited storage space on Commodity Hardware?

773

Un-Answered Questions { Big Data }

Explain Erasure Coding in Hadoop?

560

Why not just use zookeeper for everything?

What is Cassandra-CQL collection?

What are the different database elements of cassandra?

Does hadoop always require digital data to process?

1222

Explain about trformations and actions in the context of rdds?

326

how Cassandra writes changed data into commitlog?

105

How can we change the split size if our commodity hardware has less storage space?

722

What is troubleshooting for impala?

How hbase handles the write failure?

208

Can ambari manage multiple clusters and why?

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?

What does rdd mean?

333

What are the responsibilities of a data analyst?

667

Explain cap theorem?

107

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