I went through three rounds of Accenture interviews last quarter and behavioral questions showed up in almost every round, not just the dedicated HR screen. Worth sharing what I saw since there's not a lot of recent detail out there.
First thing: get familiar with Accenture's core values. They call them their "five core values": client value creation, one global network, respect for the individual, best people, and integrity. At least two interviewers explicitly referenced these. One asked me point-blank which of the values resonates most with my working style and why. So yes, they matter.
Questions I remember clearly: "Tell me about a time you had to deliver bad news to a client or stakeholder." "Describe a situation where you worked across different teams or functions to solve a problem." "Tell me about a time you had to adapt your communication style for a particular audience." "Give me an example of when you took ownership of something outside your defined role." "When have you identified a process improvement that had real business impact?"
There's a strong consulting flavor. Client-facing situations play well even if you're interviewing for an internal tech role. Think about stories that show you can navigate ambiguity with stakeholders, not just technical ambiguity.
The STAR format works here. But don't be robotic about it. The interviewers seemed genuinely interested in the "so what" part, not just a tidy narrative. What did the client think? What happened after? Did the relationship change?
I was coming back from a gap year (burnout, mostly) and was upfront about it. Nobody pushed hard on the gap. They seemed more interested in what I learned during that time and how I'd apply it. That was a relief.
One thing I wish I'd prepped more: examples of working across cultural or geographic differences. Accenture is a global company and they seemed to weigh that.