What personality tests actually measure
Workplace personality tests, commonly based on frameworks like the Big Five (openness, conscientiousness, extraversion, agreeableness, and neuroticism) or proprietary employer models, measure typical behavioural tendencies rather than skill or intelligence. There are no objectively right or wrong answers, but employers compare your profile against traits associated with success in the specific role, so consistency and honesty across similar questions matter more than trying to guess an "ideal" personality.
Common formats
Most personality tests present statements about typical behaviour or preferences ("I prefer to plan carefully before acting" or "I enjoy working with a lot of people around me") and ask you to rate your agreement on a scale, or to choose which of several statements describes you most and least. Built-in consistency checks often repeat similar questions in different wording, which is designed to catch answers that are inconsistent with genuine self-reporting.
How to answer without hurting your chances
Answer honestly and at a natural pace rather than overthinking each statement or trying to reverse-engineer what the employer wants, since inconsistent answers from overthinking often score worse than an honest, coherent profile. Answer as your genuine working self, not an idealised version, and avoid extreme responses (always or never) unless they are genuinely true, since realistic, moderate answers tend to be more internally consistent and credible.