• Many immigrants come to America in search of a better life.Statue of Liberty image by Roy L. from Fotolia.com
  
  Legal immigration to the United States is a long and difficult process. After getting a green card, which allows you to live and work in the U.S. for up to 10 years, you will have to prove you are fluent in English and complete an application and interview for citizenship, according to the 800 Citizen website. Preparing for the interview can improve your odds of success.
  
  

Marriage

• If you are applying for citizenship after marrying a U.S. citizen, interviewers will likely ask questions about your marriage. They are testing your knowledge of your spouse to make sure that you did not get married just to get citizenship, explains the Today's Immigration website. They likely will ask about when and where your spouse was born, how and when you met, how long you have known each other, why you got married, and other personal questions to ensure that you have a legitimate marriage.
  
  

U.S. History

• You are expected to prove that you know about the history of the United States, our laws and the symbols that are important to our country, according to the East Side Adult Education website. Some questions you may be asked include why there are 13 stars on the American flag, the date of Independence Day, from whom did the U.S. declare independence, who are the current president and vice president and who were some of the signers of the Constitution.
  
  

Government

• All citizens are required to know how the U.S. government works. Interviewers may ask questions related to this, such as how many branches of government there are, how the president is elected, who is in charge if the president and vice president both die, and how members of the Supreme Court are chosen, according to 800Citizen.com. Other questions may include how a bill becomes law, how the Constitution can be amended and what are some of the freedoms guaranteed by the Bill of Rights.