The DILR section is mostly practice-based. There is not much theory-based or conceptual parts involved in the question unlike Quantitative Ability or Verbal Ability sections. Here, rather than focusing on the definitions of the topics, students get more accustomed to the question types and excel in the areas through practice. As it takes practice to improve the analytical and critical thinking ability rather than rote learning the concepts. The Data Interpretation is all about reading and comprehending tables and charts. The questions are calculation based, so you need to a strong base in Maths and practice. Logical Reasoning too is all about deciphering puzzles and patterns so even for that no theoretical knowledge is required. Practice questions are the key.