Big data Interview Questions and Answers

Big data Interview Questions and Answers

Big data is knowledge sets that are thus voluminous and complicated that traditional data processing application software system are inadequate to agitate them. big data challenges embody capturing data, data storage, data analysis, search, sharing, transfer, visualization, querying, updating, data privacy and data supply. There are 5 dimensions to big data referred to as Volume, Variety, velocity and the recently additional veracity and value.

Lately, the term “big data” tends to refer to the use of predictive analytics, user behavior analytics, or certain other advanced data analytics methods that extract value from data, and seldom to a particular size of data set. “There is little doubt that the quantities of data now available are indeed large, but that’s not the most relevant characteristic of this new data ecosystem. “Analysis of data sets can find new correlations to “spot business trends, prevent diseases, combat crime and so on.” Scientists, business executives, practitioners of medicine, advertising and governments alike regularly meet difficulties with large data-sets in areas including Internet search, fintech, urban informatics, and business informatics. Scientists encounter limitations in e-Science work, including meteorology, genomics, connect omics, complex physics simulations, biology and environmental research.

What is Big data?

Why Big data use?

Can you define Big Data Analytics?

What are the Characteristics of Big data? (10V’s of Big data)

What are the important tools useful for Big Data?

Can you explain data preparation?

Explain the steps to be followed to deploy a Big Data solution?

Can you explain Ingestion in Big Data?

What is Hadoop?

Can you define Data Lake?

How do big data solutions interact with the existing enterprise infrastructure?

Can you define Oozie?

Can you explain the common input formats in Hadoop?

Can you explain the core methods of a Reducer?

How is big data analysis helpful in increasing business revenue?

Why do we need Hadoop for Big Data Analytics?

Can you define a Combiner?

Can you explain Edge Nodes in Hadoop?

Can you define a UDF?

Can you define TaskInstance?

Can you Define FSCK?

What are the different catalog tables in HBase?

Explain how are file systems checked in HDFS?

What is difference the between Sqoop and distCP?

Explain how do “reducers” communicate with each other?

Can you explain collaborative filtering?

What are the important modes of Hadoop?

Explain some important features of Hadoop?

Explain the responsibilities of a data analyst?

Can you explain the benefits of Big Data?