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00: 13 Data Warehouse interview Q&As – Fact Vs Dimension, CDC, SCD, etc – part 1

Star schema dimensional modelling with Facts & Dimensions

Q1. What is dimensional modelling in a Data Warehouse (i.e. DWH)?
A1. A dimensional model is a data structure technique optimised for Data Warehousing tools (i.e.

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00: 13 Data Warehouse interview Q&As – Fact Vs Dimension, CDC, SCD, etc – part 2

Star schema dimensional modelling with Facts & Dimensions

This extends Q1 to Q5 at 13 Data Warehouse interview Q&As – Fact Vs Dimension, CDC, SCD, etc – part 1. Q6. … Read more ›...

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00: 18+ SQL best practices interview Q&As

SQL Best Practices

It is a must to know the order in which the SQL clauses are executed. This is demonstrated with an example below in #5. Have this order of execution visibly pinned and understood.

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00: 25+ SQL interview questions & answers – beginner

SQL interview Questions & Answers is a must for any developer as all non-trivial applications need to talk to a database with CRUD operations. Q3 – Q15 are very popular with the interviewers.

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00: 25+ SQL interview questions & answers – intermediate to experienced

This continues 25+ SQL interview questions & answers – beginner Q16. Why do you have CASE statements in SQL? A16. … Read more ›...

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00: A roadmap to become a Big Data Engineer – What skills are required?

Big Data Engineer road map. What skills are required?

Data Engineer road map

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00: Apache Spark eco system & anatomy interview Q&As

Q01. Can you summarise the Spark eco system?
A01. Apache Spark is a general purpose cluster computing system. It provides high-level API in Java,

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00: Data Lake Vs. Data Warehouse Vs. Data Lakehouse Vs Data Fabric Vs Data Mesh

Modern data architectures will have both the Data Lakes and Data Warehouses. The Data Engineers build the data pipelines for the data analysts and scientists to build business reports &

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00: Python dynamic typing, module Vs package and Class Vs Object interview Q&As

Python packages vs modules

Python is a very popular interpreted programming language with the features like strongly typed, dynamically typed, object oriented (i.e. polymorphism, inheritance & encapsulation) & supports functional programming. Also,

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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,

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