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 do you mean by logging in cassandra?

What do you mean by replication strategy?

How data or a file is written into hdfs?

What is a namenode in hadoop?

What is secondary namenode?

What do you mean by meta data in hdfs? List the files associated with metadata.

Explain the hdfs architecture and list the various hdfs daemons in hdfs cluster?

Can you modify the file present in hdfs?

Define data integrity?

What do you mean by the high availability of a namenode? How is it achieved?

Hdfs stores data using commodity hardware which has higher chances of failures. So, how hdfs ensures the fault tolerance capability of the system?

Define hadoop archives?

What is secondary namenode? Is it a substitute or back up node for the namenode?

What is the command for archiving a group of files in hdfs.

Explain the hdfs architecture?

Un-Answered Questions { Big Data }

Are spark dataframes distributed?

314

Clarify Memtable?

In hbase what is column families?

174

What are the functions of presto?

What is the difference betwaeen mapreduce engine and hdfs cluster?

What is the importance of dfs.namenode.name.dir in HDFS?

Can the name of a view be same as the name of a hive table?

758

Why is spark fast?

295

What are combiners? When should I use a combiner in my MapReduce Job?

901

How data or file is read in HDFS?

What problems have you faced when you are working on Hadoop code?

968

What is meant by streaming access?

546

Why big data?

555

Differentiate between the terms: node, a cluster, and data center in cassandra?

When to use Avro, explain?

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