Jamia has assigned minimum qualifying marks to all its entrance tests, either subjective or objective. Every test taker must secure minimum 40% marks in the JMI entrance test to be able to get shortlisted for further admission/selection process. The same is mentioned under the Jamia Millia Islamia FAQs. Check below,

"What are the minimum marks to qualify the entrance test?
In Programme which has subjective/ descriptive components in the Entrance Test, candidates obtaining less than 40% marks in the subjective/ descriptive part of the Entrance Test, will not be eligible for short-listing for interview/ admission. "
http://jmi.ac.in/aboutjamia/centres/mcrc/faq#M.A_in_MASS_COMMUNICATION

The final selection will comprise,

1. Interview- the duration will be 10-20 minutes or more according to the situation. Each candidate is evaluated on the basis of the following broad parameters -

• Knowledge of contemporary political, social, cultural and economic issues
• Knowledge of contemporary media
• Knowledge of film — Fiction and Non-fiction
• General knowledge and subjects studied at graduation level
• Visualization skills and creative aptitude
• Overall Performance (articulation, reasoning, confidence, etc.)

2. Group Discussion- a moderator will share the topic and the candidates have to present their view either in favour of the topic or against it.
3. Portfolio evaluation- Candidates shortlisted for the interview have to carry with them a portfolio that provides documentary proof/evidence of their media-related work and extra-curricular activities.
Check more details- https://media.careers360.com/articles/jmi-entrance-exam
Hope this helps