KANINI Software Solutions Associate Data Engineer Interview Questions and Answers

Developing a data pipeline to analyze customer behavior and improve marketing strategies.

• Using Python and SQL to extract and transform data from various sources

• Building machine learning models to predict customer preferences

• Collaborating with marketing team to implement data-driven strategies

I have used python packages like Pandas, NumPy, Matplotlib, and Scikit-learn for data manipulation, analysis, visualization, and machine learning tasks.

• Pandas - for data manipulation and analysis

• NumPy - for numerical computing

• Matplotlib - for data visualization

• Scikit-learn - for machine learning tasks

SCD type 2 stands for slowly changing dimension type 2, a method used in data warehousing to track historical data changes.

• SCD type 2 is used to maintain historical data by creating new records for changes in dimension attributes.

• It involves adding a new row to the dimension table with a new surrogate key for each change.

• The old record is marked as inactive with an end date, while the new record has a start date.

• This m...read more

Data warehousing is the process of collecting, storing, and managing data from various sources for analysis and reporting.

• Data warehousing involves extracting data from multiple sources and consolidating it into a central repository.

• It is used for data analysis, reporting, and decision-making purposes.

• Data warehouses are designed for query and analysis rather than transaction processing.

• Examples of data warehousing too...read more