If you joined a postgraduate course in July 2025 and wish to appear in another exam in December 2025 then yes you can apply If that December exam is entrance based like NET GATE or university exam and there is no a rule against current enrollment you are free to appear However you must ensure that the exam and institution allow dual registration without conflict You should read the official notification carefully or contact the admission office directly to confirm eligibility If there is no rule banning it you should register within the exam application window and prepare accordingly Balancing your current coursework and exam preparation is important as both will demand time You can manage this by creating a schedule dividing your day between classes assignments and exam studies Make sure to stay disciplined with your routine The key is to check the exam rules early and then plan your time so you can complete both without stress