how to solve binary logic question ?

Hi Sampath, could you elaborate on the question? What kind of binary logic questions do you have in mind.

One model of binary logic questions that appear in CAT is about true / false / alternating statements.

In this type of questions, generally there are three persons, and one of them is a truth-teller, one is a liar and the third is an alternator. To solve this type of questions, assume that the first person is a truth-teller, and check for the consistency of the other statements. If they are not consistent, assume that the second person is the truth-teller and check for the consistency of the other statements, and so on. This way, all the possibilities can be listed.

is it like trail and error method ?
but that will take a lot of time if there are many statements.