Hii aspirant...

In CAT entrance exam both MCQ option based question and subjective questions are being asked in the paper.

In the MCQ section of questions the the candidate is provided with 4 options and candidate have to choose the correct option for the question.

After year 2015 iIMs have introduced subjective questions for CAT entrance examination in which the candidates have to write the answers instead of doing choice for correct answer of MCQs.

Although number of questions are not fixed for both objective types of questions and MCQs question thus  I will suggest you to better see the previous year question paper to know more.

For more information visit the link

https://bschool.careers360.com/articles/cat-exam-pattern/amp#referrer=https://www.google.com

Hope it helps. 

Best of luck.