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

Big Data Interview Questions

Questions Answers Views Company eMail

Is there a date data type in Hive?

787

What do you mean by schema on reading?

767

Can a table be renamed in Hive?

779

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?

172

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?

What is the difference between Input Split and an HDFS Block?

What is NameNode and DataNode in HDFS?

Un-Answered Questions { Big Data }

Can you explain how you can use Apache Spark along with Hadoop?

323

What are the options-process for upgrading zookeeper?

How to change a number of mappers running on a slave in MapReduce?

844

What is big data in dbms?

648

Highlight the difference between group and Cogroup operators in Pig?

912

When is it not recommended to use MapReduce paradigm for large scale data processing?

740

Explain the various table design approaches in HBase?

140

Describe Accumulator in detail in Apache Spark?

330

What is the advantage of hadoop over java serialization?

What are the different String functions available in pig?

855

Define the level of parallelism and its need in spark streaming?

404

Can we rename the output file?

743

What do you mean by ZNode?

Can you define a block and block scanner in hdfs?

How message is consumed by consumer in kafka?

532

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