I went through the Walmart Global Tech onsite in April and ended up with an offer. The behavioral portion was more involved than I expected, so writing this up.
Walmart has something they call their culture and values framework. The core themes that came up across three different behavioral rounds were: servant leadership, customer obsession (they mean literal customers, like people in the store), respect for the individual, striving for excellence, and acting with integrity. These aren't just posted on a wall, interviewers actually anchor questions to them explicitly.
Questions I got, roughly: Tell me about a time you had to make a decision with incomplete data. How did you handle the uncertainty? Describe a situation where you disagreed with your manager. What did you do? Give an example of a time you improved a process that others had accepted as just "the way things work." Tell me about a time you had to deliver difficult feedback to a peer. Describe a situation where you prioritized long-term customer benefit over a short-term win.
Very standard STAR territory but with a specific Walmart lens. The "customer" question is the one where a lot of tech candidates stumble because they default to internal stakeholders. At Walmart, every answer benefits from tying back to the actual end consumer if you can.
What resonated. I'm a returner after two years out for caregiving. I was honest about this when it came up and the interview panel was fine with it. What they pushed on was: what did you do to stay current? I had a genuine answer (online coursework, a side project). The behavioral signal they want is self-initiative, not a flawless resume.
What didn't work for other candidates I know. Very polished, rehearsed answers that don't go anywhere messy. Walmart interviewers tend to push past the first answer with follow-up questions. Have a real story, not a cleaned-up one.
Overall behavioral difficulty: medium. Less ambiguous than Amazon leadership principles, more structured than most startups. Prep 4-5 strong STAR stories and map each to 2-3 different questions.