To get a work visa you will need a work permit. When you get the work visa it will act as your entry visa to the country. So you will not need a separate visit visa.
This depends on what your nationality is. Best thing is to check with the Swiss Embassy in whatever country you live in.
Yes, you can work in the US with a visa.
i need the visa for work in any country
How you can get greencard if you work with visa J1?"
Work visa can be got through employers only. Either company in US should recruit you and apply for your work visa or company in your home country also can send you to work in US on a work visa. Depending on the requirement and your eligibility you will be issued a visa with which you get authorization to work in US.
Of course not. You cannot work in Singapore with a visitor's visa. This would be illegal. You have to apply for a Singapore work visa.
Work visa can be got through employers only. Either company in US should recruit you and apply for your work visa or company in your home country also can send you to work in US on a work visa. Depending on the requirement and your eligibility you will be issued a visa with which you get authorization to work in US.
A "visa" is kind of like temporary citizenship. A "work visa" allows you to work in a country you aren't a citizen of, and a "visa" allows you to live there.
No, you cannot work in the USA with a tourist visa.
No, you cannot work on a B1/B2 visa.
No, you cannot work in the US with a tourist visa.