Employers want you to have a range of skills in addition to your academic qualifications. Understanding more about your personality will help an employer (and you) to recognise the way in which you are likely to approach different situations, and those where you might have to change your preferences to work more effectively.
Answer honestly - there are no right or wrong answers. If you did manage to 'fool' the system, you could end up being accepted for a job for which you are temperamentally unsuited, resulting in an unhappy you and an unhappy employer.
It is important to remember that personality assessments look at how you typically behave, or what your usual preferences are.
Try the Type Dynamics Indicator, on the online assessment page. This questionnaire looks at your preferences, or how you are likely to react and behave in different circumstances. It's based on the work of psychologist Carl Jung, whose theories are behind the most widely-used personality assessments in the world.