A more thorough explanation:

Bar examination is a test that a person must pass to become a licensed attorney. It is a written exam that is different in every state, but most exams include a national multiple-choice test called the Multistate Bar Examination (MBE) and an essay portion that tests federal and state laws. Some states also have a performance test to assess lawyering skills.

• John wants to become a lawyer in California. He must pass the California Bar Examination to get his license.
• Samantha passed the bar examination in New York, but she wants to practice law in Florida. She must take the Florida Bar Examination to get her license in that state.

These examples show that each state has its own bar examination, and passing the exam is necessary to become a licensed attorney in that state.