Most law entrance exams these days are based on legal reasoning and not legal knowledge, only the most basics of tort law need to be covered for preparation. The purpose of covering these topics is not that the students taking entrance exams need to know these. The topics of law are taught in law school and there is no need to know them beforehand. The purpose is that when these topics come in the exam in form of passages, the students are already familiar with it and there is no need to go through the entire passage and save time, or at the most skim through the passage and only notice the important details.
This also means that when the aspirants learn these topics, they may be asked to read and analyse these quickly which would help give them increased reading and analysis skills, which are both important for giving any modern law entrance exam.
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CLAT, for instance, gives heavy emphasis on legal aptitude, and questions can be asked based on the given passage, in which legal details may even be altered to confuse the candidates who studied the relevant law but did not read the passage carefully. To avoid such mistakes, it is imperative to learn how to read carefully, that is, with fast speed but without missing any important details.
However, for a basic understanding of the legal subjects, one can cover the subjects of important legal maxims, the basics of Indian Contract Act, Criminal law in brief, major provisions of Indian Penal Code, Intellectual Property Law and the Constitution of India. In the law of torts, topics such as battery and assault, defamation, strict and vicarious liability, general defences, negligence, trespass and nuisance and such other topics, which form the base of tort law can be taught in brief, such as their meaning, essentials and the defences for them, in order to prepare one for CLAT.
As per the new pattern for AILET, there is no separate bifurcation for legal reasoning and questions for this category may or may not be asked in the logical reasoning section. The preparation for CLAT is more than sufficient when attempting AILET, as far as legal reasoning is concerned.
Similarly, even in SLAT, which has a separate legal reasoning section, it is easy if CLAT level legal knowledge is present. LSAT, which is also a popular exam for law aspirants, does not have a legal section, or any questions related to law, and is purely based on reading skills of the one taking the examination.
MH CET, another popular choice, especially in Maharashtra, has a Legal Aptitude and Legal Reasoning section, which has the same syllabus as that of other law entrance exams having similar sections. Thus, some basic understanding of the major branches of law is only required for law entrance exams, apart from quick and efficient reading and analytical skills.