Engineer

This decade belongs to Electronics and Telecommunications. Electronics and Telecommunications will continue to impact all walks of life including business. Next wave of Industrial revolution is automation and electronics will play a vital role in it. ECE engineers can be employed in all type of industries including IT. Computer Science is the facilitating technology for all business and personal activities. Indian IT industry is worlds largest outsourcing hub. Computer Science engineering is dominating the job market for last 15 years. Indian computer industry has started to show an early sign of decline due to the outcry against outsourcing in the western world. Therefore, Electronics &Telecommunication is the best option with respect to career opportunities and scope. Computer Science will continue to be a good career option for some time in the field of Engineering. IT graduates have similar career opportunities as CSE graduates. CSE graduates have a minor advantage over IT graduates in the job market. Mechanical is an evergreen branch for last 50 years and will continue to remain same in next 50 years. Chemical Engineering is a niche branch with relatively lesser job opportunities. Therefore, my recommendations in order of precedence are ECE, CSE, IT, Mechanical and then Chemical engineering if the student does not have any specific area of interest.

A scientist is a person who has scientific training or who works in the sciences. An engineer is someone who is trained as an engineer. So, to my way of thinking, the practical difference lies in the educational degree and the description of the task being performed by the scientist or engineer.
On a more philosophical level, scientists tend to explore the natural world and discover new knowledge about the universe and how it works. Engineers apply that knowledge to solve practical problems, often with an eye toward optimizing cost, efficiency, or some other parameters.
There is considerable overlap between science and engineering, so you will find scientists who design and construct equipment and engineers who make important scientific discoveries.