i want to do any certificate or diploma course in technical field. so which course i preferred pl z tell me about.

You may either join ITI and get trained there in Welding technology or in engineering side such as electrical, mechanical OR do Diploma in any branch of engineering.

if ur a 10th pass(min. 65%) or a 12th pass,u may apply for polytechnic in ur field of interest......else iti is also good...but prefer poly

My suggestion is Diploma in Mechanical Engg/ Electronics and Comunication., both Having great future.