Koch Business Solutions Data Engineer Interview Questions and Answers

Window functions in SQL are used to perform calculations across a set of table rows related to the current row.

• Window functions are used to calculate values based on a specific subset of rows within a table.

• They allow for ranking, aggregation, and other calculations without grouping the rows.

• Examples of window functions include ROW_NUMBER(), RANK(), and SUM() OVER().

Delta Lake is an open-source storage layer that brings ACID transactions to Apache Spark and big data workloads.

• Delta Lake is built on top of Apache Spark and provides ACID transactions for big data processing.

• It allows for schema enforcement and evolution, data versioning, and time travel queries.

• Delta Lake is compatible with popular data science and machine learning libraries like TensorFlow and PyTorch.

Pods are the smallest deployable units in Kubernetes, consisting of one or more containers.

• Pods are used to run and manage containers in Kubernetes

• Each pod has its own unique IP address within the Kubernetes cluster

• Pods can contain multiple containers that share resources and are scheduled together

• Pods are ephemeral and can be easily created, destroyed, or replicated

• Pods can be managed and scaled using Kubernetes contr

My strengths include strong analytical skills, attention to detail, and problem-solving abilities.

• Strong analytical skills - able to analyze complex data sets and derive meaningful insights

• Attention to detail - meticulous in ensuring data accuracy and quality

• Problem-solving abilities - adept at identifying and resolving data-related issues

• Experience with data manipulation tools like SQL, Python, and Spark

Seeking new challenges and growth opportunities in a different environment.

• Looking for new challenges to enhance my skills and knowledge

• Seeking growth opportunities that align with my career goals

• Interested in exploring different technologies and industries

• Want to work in a more collaborative team environment

• Seeking better work-life balance or location proximity