My brother scored 428 in 2015, and he was qualified for the CSE branch, but instead, he chose ME. In the current situation, a score of more than 440 is required to obtain a spot in CSE.
Because the cut-off for each year varies, it's difficult to specify what the minimum marks are required for CSE.
You can check the cut-off stats for CSE in the last few years in the table below.
Year | General | OBC | SC | ST |
2019 | 193-342 | 357-495 | 2749-4252 | 9914 |
2018 | 7036 | 185-636 | 920-1891 | 4315-5089 |
Hope this gives you some idea about the cutoff required for CSE at IET Lucknow.