Tests and assessments are used in the recruitment and selection process to evaluate candidates. Ability and aptitude tests measure specific skill sets through multiple choice questions under exam conditions. Psychometric and personality tests assess preferences and values through un-timed tests with multiple answers related to personality traits like teamwork and leadership. Assessment centers last 1-2 days and include social events, information sessions, and exercises to measure competencies. Internal recruitment is cheaper and faster but lacks new ideas, while external recruitment casts a wider net but costs more and takes longer.