Can a student sit in placement session after getting placed in other company at Thapar University?

I have a friend who recently graduated from Thapar University and he gave me some insight regarding the placement procedure at the institute. 

Whether you will be able to sit in a placement session for a company after being selected in another company, depends on various parameters. This means the companies that visit Thapar University can be divided into 3 separate categories. Which are as follows.

• Category 1: Offers more than INR 4 LPA.
• Category 2: Offers either more than INR 4 LPA or less than INR 8 LPA.
• Category 3: Offers more than INR 8 LPA.

If you are placed in category 2, then you cannot sit for the interview session conducted for category 1. However, you still have the option open to sit for the interview session held in category 3. 

To add more, there are certain companies that are rated as “Dream Companies”. If a student is placed in that particular “Dream Company”, then he or she might not be able to sit for any other placement session held in either category.