Hello Aspirant ,

The exams for the even semesters(semester 2/4/6) of Delhi University are mostly starts in first half  of may and results are declared in July or August , so it takes around 2 to 3 month maximum for Delhi University to declare the result.

Exams takes place for around 20-25 days(excluding) which differs from course to  course and then you get around 2 months of summer vacation.

Hope this helps.