Google's difficult interview questions attract candidates who enjoy solving tough problems, which is a strategy worth emulating.

The skill that interviews can most easily measure is the ability to think through small problems quickly, but the ability to solve large, complex problems well over time is what you need in an employee.

Candidates who answer questions easily tend to be better engineers, but there are also false negatives where great engineers may struggle with questions.

When hiring, the most important question is not just whether a candidate can do the job, but how they will improve the performance of other team members through their questioning and thinking.

To improve the hiring process, companies should ensure that all candidates are asked the same questions and evaluated consistently, which is more important than the specific questions asked.

When hiring for a role outside your expertise, ask candidates to explain their answers to gauge their understanding and communication skills.

A candidate's motivation and depth of thinking can be assessed during interviews, which is crucial for hiring decisions.

The quality of a candidate's thinking should be evaluated through the questions they ask during the interview process.

It's important to consider the candidate experience during interviews, as a positive experience increases the likelihood of accepting an offer and improves performance.