There are several factors that determine the SRMJEEE cutoff. Some of these factors are the difficulty level of the entrance exam, the number of candidates who appeared for SRMJEEE, the total number of seats in the SRM campuses, previous years' cut-off trends, etc.
No, you cannot get CSE in the SRM Chennai campus with 20,000 rank in SRMJEEE 2025. However, you may try a different branch/campus that offers admission at this rank.
No, SRMJEEE cutoff marks shall vary for the various B.Tech programs and SRM campuses.