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

Big Data Interview Questions

Questions Answers Views Company eMail

Why HDFS stores data using commodity hardware despite the higher chance of failures?

What are file permissions in HDFS and how HDFS check permissions for files or directory?

How data or file is written into HDFS?

What is throughput? How does HDFS get a good throughput?

What is the benifit of Distributed cache, why can we just have the file in HDFS and have the application read it?

List the various HDFS daemons in HDFS cluster?

What is the difference between NAS and HDFS?

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

What do you mean by metadata in HDFS? Where is it stored in Hadoop?

100

What is the optimal block size in HDFS?

What do you mean by metadata in HDFS?

Data node block size in HDFS, why 64MB?

What happens if the block in HDFS is corrupted?

What is Fault Tolerance in HDFS?

What is the procedure to create users in HDFS and how to allocate Quota to them?

Un-Answered Questions { Big Data }

What are the benefits of apache kafka over the traditional technique?

1043

How do you check if a particular partition exists?

733

Is spark better than mapreduce?

293

How many layers of Hadoop components are supported by Apache Ambari and what are they?

What is bag?

720

How many ways we can create rdd in spark?

309

How to invoke Command Line Interface?

What is Bucket in Hive?

785

Why is Hive not suitable for OLTP systems?

817

Explain count_star?

615

Compare Traditional queuing systems vs Apache Kafka?

576

Define a record reader?

455

Does spark work with python 3?

313

How to identify that the given operation is transformation or action?

290

Can you explain broadcast variables?

318

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