Hello Umesh Krishna,
For answering the UCCED exam in offline mode, there will be sketch based questions wherein you have to draw sketches according to the question asked so you need to have a good imagination as well as basic drawing skills. You need to be good at fine art to be able to draw fine for art based questions.
But, if the exam is conducted in online mode or I should say computer-based, then you won't have any questions to sketch but the questions will be asked on fundamentals of drawing.
Good luck and stay safe!