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?

131

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 }

What are the different file permissions in the HDFS for files or directory levels?

159

What are Actions?

336

Explain Alter Table Statement in HCatalog?

What is an input reader in reference to mapreduce?

669

What is Hadoop HDFS – Hadoop Distributed File System?

What is the difference between spark ml and spark mllib?

310

What is a nosql database?

Tell any two features of flume?

116

Ideally what should be replication factor in a Hadoop cluster?

562

What is the best hardware configuration to run Hadoop?

1676

How can you use consumer api?

561

Name commonly-used Spark Ecosystems

329

What does map transformation do? Provide an example.

332

What exactly is hadoop?

735

What is Data Log in Kafka?

867

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