Amantya Technologies Senior Data Engineer Interview Questions, Process, and Tips

Azure Data Lake is a cloud-based storage and analytics service, while Delta Lake is an open-source storage layer that adds reliability to data lakes.

• Azure Data Lake is a service provided by Microsoft Azure for storing and analyzing large amounts of data.

• Delta Lake is an open-source storage layer that adds ACID transactions and schema enforcement to data lakes.

• Azure Data Lake is a cloud-based solution, while Delta Lake ...read more

Primary keys and foreign keys can be implemented in delta tables using constraints and references.

• Primary keys can be implemented using the PRIMARY KEY constraint, which ensures that each record in the table has a unique identifier.

• Foreign keys can be implemented using the FOREIGN KEY constraint, which establishes a link between two tables based on a common column.

• The referenced table must have a primary key defined, a...read more

Exception handling in Python allows for the graceful handling of errors and prevents program crashes.

• Use try-except blocks to catch and handle exceptions.

• Multiple except blocks can be used to handle different types of exceptions.

• The finally block is executed regardless of whether an exception occurred or not.

• Exceptions can be raised using the 'raise' keyword.

• Custom exceptions can be defined by creating a new class that

Star schema is a data modeling technique where a central fact table is connected to multiple dimension tables. Snowflake schema is an extension of star schema with normalized dimension tables.

• Star schema is a simple and denormalized structure

• It consists of a central fact table connected to multiple dimension tables

• Dimension tables contain descriptive attributes

• Star schema is easy to understand and query, but can lead t...read more

The most frequently changing data

• Customer preferences

• Market trends

• Weather data

• Stock prices

• Social media trends