Deloitte Azure Data Engineer Interview Questions, Process, and Tips

Medallion Architecture is a data processing architecture that involves breaking down data into smaller pieces for easier processing.

• Medallion Architecture involves breaking down data into smaller pieces for easier processing

• It allows for parallel processing of data to improve performance

• Commonly used in big data processing systems like Hadoop and Spark

Spark Architecture is a distributed computing framework that provides an efficient way to process large datasets.

• Spark Architecture consists of a driver program, cluster manager, and worker nodes.

• It uses Resilient Distributed Datasets (RDDs) for fault-tolerant distributed data processing.

• Spark supports various programming languages like Scala, Java, Python, and SQL.

• It includes components like Spark Core, Spark SQL, Spa...read more

Use SQL query to find the second highest salary in employee table

• Use SQL query with ORDER BY and LIMIT to get the second highest salary

• Example: SELECT DISTINCT salary FROM employee ORDER BY salary DESC LIMIT 1, 1

Partitioning in Azure Data Engineer involves dividing data into smaller chunks for better performance and manageability.

• Partitioning can be done based on a specific column or key in the dataset

• It helps in distributing data across multiple nodes for parallel processing

• Partitioning can improve query performance by reducing the amount of data that needs to be scanned

• In Azure Synapse Analytics, you can use ROUND_ROBIN or H

As an Azure Data Engineer, my current responsibilities include designing and implementing data solutions on Azure, optimizing data storage and processing, and ensuring data security and compliance.

• Designing and implementing data solutions on Azure

• Optimizing data storage and processing for performance and cost efficiency

• Ensuring data security and compliance with regulations

• Collaborating with data scientists and analysts

Partition key is a field used to distribute data across multiple partitions in a database for scalability and performance.

• Partition key determines the partition in which a row will be stored in a database.

• It helps in distributing data evenly across multiple partitions to improve query performance.

• Choosing the right partition key is crucial for efficient data storage and retrieval.

• For example, in Azure Cosmos DB, partit...read more

Data bricks is a unified analytics platform for big data and machine learning, while ADF (Azure Data Factory) is a cloud-based data integration service.

• Data bricks is a unified analytics platform that provides a collaborative environment for big data and machine learning projects.

• ADF is a cloud-based data integration service that allows you to create, schedule, and manage data pipelines.

• Data bricks supports multiple pr...read more