I have 4 years gape after 10th and now i completed diploma engineering, so i interested to do btech in KIIT.

Itcan definitely create job issues asconpanies would ask you reason behind the gap.

If you simply state academic performance as the reason, it shall knock you out of major comapnies.
So in this case we recommend you to take up online certification basedcourses and show all certificates as  means to close the gap.
Some bestcourses into communication skills, programming skills, shall work best for you.

You can join onlinecourse programme on platform like Udacity and Udemy.

Also taking up internships opportunities shall remove all issues with job opportunities.

Hey Sajid!
I don't think so that there will be any problem because of 4 yr gap. But yes you must hold a valid reason behind this big gap.
And yes, it's really good to know that you have a quest to study further.
Best of luck buddy :)