As CAT has officially released a mock test pattern.. Can you do a video on selection of question as that plays a crucial role

This is not a test pattern. They have not disclosed number of questions. This mock is released so that students will get comfortable with the interface. IIM's have nowhere mentioned that CAT will have same number of questions.

Hi they mentioned this "The objective of this Mock Test is not to disclose the exam pattern for CAT 2020 and the actual exam may or may not contain similar type or number of questions"

And also the official mock is old CAT paper.