1) The document discusses various psychological tests used in recruitment and selection, including tests that measure abilities, personality, motives, traits, intelligence and more.
2) It outlines 16 different personality types based on traits of introversion/extraversion, sensing/intuition, thinking/feeling, and judging/perceiving. Strengths of each type are provided.
3) Examples of common tests used by companies are described, such as tests by HUL measuring analytical ability, tests by Rolls-Royce measuring reasoning skills, and Goldman Sachs' interview process involving verbal and logical reasoning tests.