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 much Metadata will be created on NameNode in Hadoop?

What do you mean by metadata in Hadoop?

How to Delete directory and files recursively from HDFS?

How does HDFS Index Data blocks? Explain.

How to access HDFS?

Explain the process that overwrites the replication factors in HDFS?

Difference Between Hadoop and HDFS?

How would you import data from MYSQL into HDFS ?

Define HDFS and talk about their respective components?

What is the module in HDFS?

Tell me two most commonly used commands in HDFS?

What is a block in HDFS? what is the default size in Hadoop 1 and Hadoop 2? Can we change the block size?

HDFS is used for applications with large data sets, not why Many small files?

What is impala?

130

Why we need impala hadoop?

Un-Answered Questions { Big Data }

Explain values() operation in apache spark?

547

What is Sqoop Validation?

How does impala process join queries for large tables?

Explain what is Cassandra-Cqlsh?

What are the various advantages of DataFrame over RDD in Apache Spark?

329

List out some common problems faced by data analyst?

495

Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?

485

What is Partition table in Hive?

774

How big data analysis helps businesses increase their revenue?

731

What are the basic steps to writing a UDF Function in Pig?

739

How many numbers of reducers run in Map-Reduce Job?

657

What is SparkSession in Apache Spark? Why is it needed?

398

Define Thrift?

277

What is a udf?

512

Explain the concept of bloom filter?

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