The HR process was pretty standard, phone screens with recruiter, phone then in person interviews. There could be more customization to the job descriptions as they can be vague. It helps to get internal referrals, as it does at most companies, but there is a decent amount of cold recruiting.
Interview questions [1]
Question 1
If the role is specifically tied to analytics, its best to have specific examples at hand for how you leveraged data in your previous experience. Knowledge of the retail industry a bonus, with a level of comfortability with change. Knowledge of Walgreens recent changes in strategy are helpful as well so they know you've done your homework.