Of course, Dear Zakir you can manage easily because the syllabus of COMDEK exam also from class 12th syllabus so focussed your 12th class syllabus side by side you have to prepare also 11th class syllabus which is the part of COMDEK exam, you can do it easily just check out the paper pattern and last year papers and cut off for COMDEK exam and practice question according to COMDEK paper. Just fully focussed toward your study you can easily do it for sure.

All the best Zakir