how can i know what job i want

This is the toughest question ever. There are many factors which actually can change our need and requirements. Still, it can be little helpful if we know about our likes and dislikes for sure. Before choosing a career, ask one small question to yourself... "What is the single thing you enjoy doing everyday and you have been doing that without losing your interest for even a single time?" If there is an answer already available, then you know which path you want to walk from now. If not, then try to find the interest which will be intriguing for you for the rest of the life. And eventually, pursue a career in that field and get a job in that. Trust me, you will be able to thrive and prosper in that field with your heart and soul.

Additionally when you are in college, you can try for internships in different domains. that will be a real time exposure to the actual job and will help you decide a career path for yourself.

To add to Karen's response, one practice that I have found useful is to evaluate your strengths and then find jobs / opportunities / roles that utilize those strengths. A book called Strengthfinders 2.0 by Tom Rath helped me.

The best way to know what you want is to explore many options. Volunteering is a great way to gain experience and to discover what appeals to you. Ask yourself things like, do I most enjoy working with people or things? If people, perhaps you want to consider jobs like social workers or retail positions. If you enjoy things, you might like working with computers or engineering.

Good to also consider what factors are important to you such as salary, benefits, flexibility, co-workers, values of the organization and potential growth.

It's ok if you don't know what job you want now. Experiencing a variety of positions might help you decide what you want to do in the future, and you always have the option of having a number of careers in your lifetime. With every good wish!!

We have all been there at this stage of life where you are not sure what you want to take up as a career .

Follow your passion is the most cliche answer .I wouldn't go with that .Most people have responsibilities and don't have the luxury of family money to take care of expenses .

I would rather say make a career in what you are interested in but that would also put sufficient money in your pocket eventually .

You may have passion for something but not the necessary skillset that it takes to make it big in the field of your interest .Not everyone who has passion for music has the talent to make it big .

Identify fields you are interested in .Talk to more and more people and find out more about the career options ,what daily life would be like ,what skills are required ...

Identify your skillset .You may have natural talent for something .You may have potential for something .Some skills esp tech related may be developed in course of time .

If you have passion for something ..It gives you happiness and there is scope to make a living out of it .Thats the best option.

If not, find a career option based on your interests , skills identified .This is developed over time