Mukund And Rohit Interview Questions and Answers

Segmentation is the process of dividing a market into distinct groups of buyers who have different needs, characteristics, or behaviors.

• Segmentation helps businesses target specific customer groups more effectively

• It involves identifying and categorizing customers based on factors like demographics, psychographics, behavior, and needs

• Examples of segmentation include age, gender, income level, lifestyle, purchasing behavior, and geographic location

A clustering algorithm is a method used to group similar data points together based on certain criteria.

• Clustering algorithms aim to partition a set of data points into groups or clusters.

• Common clustering algorithms include K-means, DBSCAN, and hierarchical clustering.

• These algorithms are used in various fields such as machine learning, data mining, and pattern recognition.

Flatten a nested array and find the sum of all elements.

• Use recursion to flatten the nested array

• Iterate through the flattened array and calculate the sum

Optimization methods in query help improve performance and efficiency.

• Use indexes to speed up query execution

• Avoid using SELECT * and only retrieve necessary columns

• Optimize joins by using appropriate join types and conditions

• Limit the number of rows returned using LIMIT or TOP clause

• Use query execution plans to identify bottlenecks and optimize accordingly

Databricks Medallion Architecture is a cloud-based architecture for data processing and analytics.

• Databricks Medallion Architecture is designed to handle large-scale data processing and analytics tasks in a distributed manner.

• It leverages Apache Spark for processing data in-memory and provides a unified analytics platform for data scientists, engineers, and business users.

• The architecture includes components like Databricks Runtime, Delta Lake, MLflow, and Databricks SQL for ...read more