Mr. Shashank, here is your answer;
An HR executive oversees the Human Resources department at a business, and is responsible for employee paperwork, benefits, training, team building and staying on top of current labor laws. The HR executive may be in charge of an HR department, if the company is a large one, or have the sole responsibility of overseeing everything HR-related herself.
Whereas, Human Resource Generalists (HR Gen) is a group of skilled people who assists companies, especially business, in human resource related issues including Training & Development.