This question will determine how the candidate approaches solving real-world issues they will face in their role as a data scientist. It will also determine how they approach problem-solving from an analytical standpoint. This information is vital to understand because data scientists must have strong analytical and problem-solving skills. Look for answers that reveal:

Examples of problem-solving methods

Steps to take to identify the barriers to performance

Benchmarks for assessing performance

"My approach to determining performance bottlenecks is to conduct a performance test. I then evaluate the performance based on criteria set by the lead data scientist or company and discuss my findings with my team lead and group."