Behavioral: Ambiguous Problems, Giving and Receiving Feedback, Hardest Project
Company: Meta
Role: Machine Learning Engineer
Category: Behavioral & Leadership
Difficulty: medium
Interview Round: Technical Screen
This behavioral round covered three topics: how you handle ambiguous problems, how you give and receive feedback, and your most challenging project. Prepare a story-based answer for each.
### Clarifying Questions
- How long should each story run, given that three topics share one round and follow-up probes are expected?
- May all three examples come from research work, or should at least one show collaboration with people outside your immediate team?
### Part 1 — Handling an ambiguous problem
Describe a time you worked on a problem that was ambiguous at the start: the goal, the approach or the definition of success was unclear. How did you make progress?
```hint Show how the ambiguity shrank
A strong story shows the concrete steps that turned an unclear goal into a testable one, not only that the project worked out in the end.
```
#### What This Part Should Cover
- What exactly was ambiguous, and why it mattered.
- The actions that reduced the ambiguity: framing options, quick experiments, alignment with stakeholders, explicit decision points.
- The outcome, and what you would do the same way next time.
### Part 2 — Giving and receiving feedback
Describe a time you gave someone difficult feedback, and a time you received feedback that changed how you work.
```hint Two directions, two stories
The question has two halves. Prepare a distinct example for each, and say what changed afterward.
```
#### What This Part Should Cover
- How the feedback was delivered: specific, timely, and about the work or the behavior rather than the person.
- How received feedback was handled: without defensiveness, and with a visible change.
- Evidence of the effect on the work or the working relationship.
### Part 3 — Your most challenging project
Describe the most challenging project you have worked on. What made it hard, and what did you personally do?
```hint Make your own role visible
Separate what the team did from what you did, and pick a challenge you can explain in technical depth if the interviewer probes.
```
#### What This Part Should Cover
- Why the project was hard, in concrete technical or organizational terms.
- Your own decisions and trade-offs.
- Results you can measure or defend, and the lessons you took from it.
### What a Strong Answer Covers
- Concise stories with situation, task, action and result, told in the first person.
- Research-style evidence where it fits: hypotheses, experiments, and changing course based on results.
- Honest reflection, including a mistake or something you would do differently.
- A different story for each topic rather than one project retold three times.
### Follow-up Questions
- What would you have done if your first attempt to reduce the ambiguity had pointed in the wrong direction?
- Tell me about feedback you disagreed with. What did you do?
- In your most challenging project, what would you have cut if you had half the time?
- How do you decide when to stop exploring and commit to a direction?
Overview: A behavioral interview for a research role covering three topics: making progress on an ambiguous problem, giving and receiving feedback, and the most challenging project. It tests structured, first-person stories, concrete actions and results, and honest reflection on what would be done differently.