Blog Archives

00: Data Lake Vs. Data Warehouse Vs. Delta Lake

Modern data architectures will have both the Data Lakes & Data Warehouses. Q1. What questions do you need to ask for choosing a Data Warehouse over a Data Lake for your …



00: Q1 – Q6 Hadoop based Big Data architecture & basics interview Q&As

There are a number of technologies to ingest & run analytical queries over Big Data (i.e. large volume of data). Big Data is used in Business Intelligence (i.e. BI) reporting, Data …



01: Lambda, Kappa & Delta Data Architectures Interview Q&As – Overview

Q1. What is the Lambda Architecture? A1. It is a data-processing architecture designed to handle Big Data by using both real-time streaming (e.g. Spark streaming, Apache Storm) and batch processing (E.g. …



02: Q7 – Q15 Hadoop overview & architecture interview Q&As

This extends Q1 – Q6 Hadoop Overview & Architecture interview Q&As. Q7. What are the major machine roles in a Hadoop cluster? A7. The three major categories of machine roles in …



05: Q37-Q41 – Data lake & metadata interview Q&As

Q37. What is a Data Lake? A37. A data lake is a storage repository that holds a vast amount of structured, semi-structured, and unstructured raw data in its native format (aka …



08: Q71 – Q75 ETL/ELT on BigData Interview Q&As

Q71. Can ETL in traditional data management (E.g. RDBMs) be migrated to EDH (i.e. Enterprise Data Hub) powered by Hadoop eco system? A71. Yes, it can be migrated, but it is …



16: Q114 – Q115 CAP theorem interview Q&As

Q114. What does CAP stand for in CAP theorem? A114. In a distributed system having two or more nodes, and maintain one or more copies of your data, the CAP theorem …



6 Distributed storage & computing systems interview Q&As

Q1. What are the key requirements to be a distributed system? A1. A distributed system must satisfy the following 3 characteristics. 1) The computers or nodes operate concurrently. 2) The computers …



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