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 }

What is flume used for?

How the SSTable is different from other relational tables?

Explain how do “reducers” communicate with each other?

507

Does Flume provide 100% reliability to the data flow?

137

Can you modify the file present in hdfs?

Explain the terms memtable, commitlog and sstables.

Which method is used to access HFile directly without using HBase?

205

What is streaming access?

495

Is spark difficult to learn?

304

Explain what you understand by speculative execution

606

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

146

What is a topic in kafka?

480

What is use of tools command?

194

What is Apache Zookeeper Meant For?

How spark is used in hadoop?

287

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