Meta interviewers evaluate things:
Problem-solving. Can you break down a problem, identify the approach, and handle edge cases?
Coding. Is your code clean, correct, and production-quality? Can you write it quickly?
Communication. Do you explain your thought process clearly? Do you ask good clarifying questions?
Verification. Do you test your solution with examples? Do you catch bugs before being prompted?
Meta values speed. You're expected to solve problems in minutes, not .