CAT and GATE are important entrance exams in India. CAT is for admission to management programs and assesses verbal, quantitative, and logical reasoning skills. GATE is for postgraduate engineering programs and public sector jobs, evaluating subject knowledge and problem-solving abilities. While CAT is computer-based for 2 hours, GATE is online for 3 hours across various engineering subjects. CAT scores are valid for 1 year, and GATE scores for 3 years.