I m punyakumar,my age is 23 and i have studied diploma in computer science and engg but my back subject is there,next what should i do next?

Dear Punya, You should concentrate on studies and try to clear your subject. Meanwhile as you have lots of free time, you can utilize it for learning Software courses and preparation for Govt Competitive exams. After Diploma you can go for B.E/B.Tech as regular path, but you can try other options