The Combined Graduate Level Examination consists of 4 tiers: Tier 1 and 2 involve computer-based exams testing general intelligence, awareness, quantitative aptitude, and English comprehension. Tier 2 also includes 4 subject-specific papers. Tier 3 involves a pen and paper descriptive exam in English or Hindi requiring essay writing, précis, letters, or applications. Tier 4 involves a computer proficiency test, skill test, or document verification depending on the position.