Hello, 

  Generally, to get admission in reputed institutes you have to qualify any of these exams. Some cases reputed Universities/Institutes will conduct their own entrance test to for the students those who missed the chance to appear national level tests, like Lovely Professional University(LPUNEST) and SRM University(SRMJEEM). This test will give you eligibility to join in that particular Institute/University. 

Hope this information will help you. Best wishes. 

Good Luck!