There is no limit for number of H1 Visa. One can have n number of H1-Visas.

H1 approval is the green paper Form I-797). It is a approval for you to work legally for the company stated on this form. A person can have multiple H1 approval from various companies, but at a time visa can be stamped for any one company only. Visa is a permit to enter into any foreign country for a specific time limit.

Legally, no. unless have a H1 approved petition approved for company B.

Yes, the person has to be physically present in US for Visa transfer from company A to Company B. Your I-94 form and few pay stubs from company A are also required. Visa transfer doesn't gets affected by H1-cap as it is already issued, and is transferable. All you need is Company B, to take care of all the paper work for transfer of Visa. You need not to take the permission from Company A for it.

On H1B visa, one can't stay for more than 6 years. If required to come again on H1B visa, then one has to stay outside USA, for atleast one year, before re-entering.You may be eligible for extension beyond 6 yrs if your green card process and your labor is pending for more then 365 days or you have applied for 485/AOS.

Yes, your employer may file your H1 petition under premium processing with extra fee.

Yes, you can. But you can't form an S-Corporation. For that you have to be a citizen of USA. There are multiple ways of starting your own company, but one of the most effective one is by incorporating "Limited Liability Company" ( LLC ). You can find lots of companies on the net which can do this. They may charge you around 150-200$, and the procedure may take few days. LLC can be a "Partnership Firm" or the liability protection as a "Incorporated Company". You can be the Chairman or Director of the board, but you can't work for it, unless you have an H1 visa issued from that company. But, you can always hire a CEO for the company, who has a work permit (Green card or Citizen etc.).

The institute is providing one of the best courses in US and its fee is reasonable, complete study atmosphere and specially its staff that is highly qualified. After surfing the net and consult with different consultants I chose this college for my studies.  

This course will lead me towards the best opportunities of my life I mean to achieve my goals in life. Yes this course is exactly related to my previous studies.  

Yes..  

US education system is one of the best across the globe. US education system has high influence in our education system. We are far behind in research and advancement in any field of life especially in education. Second we find complete study atmosphere in US, which is not available in India.  

The course I chose will open new horizons for me and there are high job prospects in multinational firms at local and international level.  

I will come back and will join any multinational firm or start my own business.  

After completion of this course, I will come back and join any reputed firm, which offer attractive packages. I will be leading in big job market, I am sure I will get an excellent job in any reputed firm otherwise I will start my own business. 

Tell the reason for your visit to USA, e.g. if you are going for H1B visa, you can mention "I will be working for XYZ company". If you are applying as a dependent, you can say that you are accompanying your spouse to USA. If you are parents going to visit your children, you may answer that you are visiting your children.

Mention the length of your trip.

Give the true answer Yes or No.

Provide the answer based on your visa type and financial situation. If it is a sponsored trip, say your sponsor will pay the expenses.

Being prepared for interview can better equip you for the interview. A prior research and preparation for commonly asked questions and their appropriate answer will be helpful during the interview

It is very important that you provide complete and truthful information. Any incomplete/false information can lead to unnecessary delay. False information can have severe impact on your future ability to apply for US visa. It may also cause you lot of frustration and legal actions against you.  

Must carry all the required documentation with complete and authentic information. Read all the prerequisites and prepare all the documents accordingly. Keeping your documentation well organized can also leave a positive impression on the consulate officer.

US consulate has strict methods of payments. Make sure you know the method and the exact amount of the applicable fee. For example, most US consulates don't accept cash as the payment method and would prefer separate bank drafts for visa application and visa issuance fee. Refer to an appropriate source for more detailed information.  

Do not give away any information voluntarily which is not being asked. In many cases, people trying to be over confident and over smart give out more detailed answers than is required. This may trigger additional related questions which may not work in your favor.

Inconsistency in the information about what you provide in the documentation and what you say during the interview can go against your case.  

Never ever make any arguments with the consulate officer. If you want some information ask in a polite manner.  

Poor communication is the number one reason reason that affect your case in a negative way. If you're not good in English, you should request for a regional language interpreter. 

Remember, you are the one being interviewed and not the other way around. So, keep your communication brief and to the point. Speak only when asked for an answer.  

Being confident can bring positive results. Especially, incase of visa interview where a consulate officer has to rely on limited information provided by you. Their judgment is highly influenced by the way you react to questions, your body language, and the authenticity of you answers.