The term "graduate" means different things in US and India. You can hold a 'diploma' that's 10+3. This 'diploma' isn't considered a graduate in the US. It's not a degree because it's shy of the typical 4 year course structure. It could just mean they have a 3 year 'degree' than a 4 year bachelor's degree. Your assumption is flawed.
1 year of additional education can make a lot of difference if you're a developer or something else, but for a help desk job, I doubt it would add much value. Also, if you have a 4 year degree, why wouldn't you aim for a dev job?