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

Big Data Interview Questions

Questions Answers Views Company eMail

How does hdfs provides good throughput?

Can we have different replication factor of the existing files in hdfs?

How will you perform the inter cluster data copying work in hdfs?

Suppose there is file of size 514 mb stored in hdfs (hadoop 2.x) using default block size configuration and default replication factor. Then, how many blocks will be created in total and what will be the size of each block?

125

List the files associated with metadata in hdfs?

Define data integrity? How does hdfs ensure data integrity of data blocks stored in hdfs?

What is a rack awareness algorithm and why is it used in hadoop?

What is a block?

What is throughput? How does hdfs provides good throughput?

Replication causes data redundancy and consume a lot of space, then why is it pursued in hdfs?

Define hadoop archives? What is the command for archiving a group of files in hdfs.

What do you mean by the high availability of a namenode?

What is the difference between nas (network attached storage) and hdfs?

What is a rack awareness algorithm?

What is the problem in having lots of small files in hdfs?

Un-Answered Questions { Big Data }

Differentiate between the various types of primary keys in cassandra.

How Mapper is instantiated in a running job?

951

Are sparks dangerous?

330

What do you mean by ss table?

How to load data in pig?

572

What is the purpose of DataNode block scanner?

894

Why Should we use Apache Kafka Cluster?

553

Why Apache Spark?

305

What is version-id mismatch error in hadoop?

1024

What is the key difference between NameNode and DataNode in Hadoop?

456

What is NoSQL?

883

What are the Hadoop features extended to its eco-system components ?

401

What is difference between spark and hadoop?

250

What is the role of JDBC driver in Sqoop?

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

515

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