Master Azure Data Engineer

    1. What is Databricks, and how is it different from Apache Spark?    Answer: Databricks is a cloud-based data platform built on Apache Spark. It offers collaborative workspaces, managed Spark clusters, and other features like MLflow and Delta Lake that enhance data engineering, machine learning, and analytics workflows.     2. Explain the architecture of Databricks.    Answer: Databricks has a multi-layered architecture with a control plane and a data plane. The control plane manages metadata, job scheduling, and cluster configurations, while the data plane executes data processing tasks on cloud infrastructure (e.g., AWS, Azure).     3. What is a Databricks notebook, and what are its main features?    Answer: A Databricks notebook is an interactive workspace where users can write, run, and visualize code in languages like SQL, Python, Scala, and R. It supports collaboration, visualization, version contro...

  In today’s cloud-first world, Azure has become one of the most popular cloud platforms. However, as organizations expand their cloud infrastructures, maintaining secure and efficient access control becomes a top priority. That's where Role-Based Access Control (RBAC) in Azure comes in. RBAC allows businesses to manage who can access resources, ensuring the right people have the right permissions. In this in-depth guide, we will explore everything you need to know about Azure RBAC : what it is, how it works, why it's essential, and best practices for implementing it. If you're looking to understand Azure access control in detail and optimize your security measures, keep reading! What is Access Control in Azure? Access Control in Azure is the process of managing who can access resources and what actions they are allowed to perform. It's a fundamental security measure to prevent unauthorized users from gaining access to critical data and services in your Azure e...

    1. What are the differences between `INNER JOIN`, `LEFT JOIN`, `RIGHT JOIN`, and `FULL JOIN`?    Answer:    - `INNER JOIN` returns records with matching values in both tables.    - `LEFT JOIN` returns all records from the left table and matches records from the right table.    - `RIGHT JOIN` returns all records from the right table and matches records from the left table.    - `FULL JOIN` returns all records when there is a match in either left or right table.     2. Explain `GROUP BY` and `HAVING`. How do they differ?    Answer: `GROUP BY` groups rows with the same values in specified columns, while `HAVING` is used to filter records that aggregate results meet a certain condition. Unlike `WHERE`, `HAVING` works with aggregated data.     3. What’s the difference between `WHERE` and `HAVING`?    Answer: `WHERE` filters rows before any aggregation, while `HAVI...

    Basic Concepts   1. What is VBA?    - Answer: VBA is a programming language developed by Microsoft for automation of tasks in Microsoft Office applications. It allows users to create macros, automate repetitive tasks, and develop custom functions.   2. What is a macro in VBA?    - Answer: A macro is a sequence of instructions that automate tasks within an application, allowing users to perform repetitive tasks with a single command.   3. How do you create a macro in Excel?    - Answer: You can create a macro by going to the `Developer` tab, clicking on `Record Macro`, performing your actions, and then stopping the recording.   4. What is the purpose of the `Dim` statement in VBA?    - Answer: The `Dim` statement is used to declare variables in VBA, specifying their names and data types.   5. What is the difference between `Sub` and `Function` in VBA?    - Answer: ...