Why are you leaving, or why did you leave, your job?
Don’t start your conversation by criticizing an employer or making inappropriate statements, such as “I need more money.” Instead, make a generic statement, such as “It’s a career move.” It is, however, fitting to discuss company issues, such as the fact that the company is being bought or shut down. If this is the case, a safe answer is that you feel you can no longer be part of the company because of the extensive changes occurring.
Example: I am seeking a position with a stable company that has room for growth and opportunity for advancement.
Why do you want to work here?
The best way to answer this question is to get acquainted with the company. Take time researching the company (the About Us section of the employer's website is a good place to start), so that you can talk about the benefits of working for this employer. If you have a connection at the company, ask them if you can get some insight on what the company is looking for in an ideal employee.
What challenges are you looking for in your next position?
The answers employers are looking for reflect how you would effectively use your skills and experience when challenges present themselves, if you were hired for the job. You can also comment that you enjoy challenges and have the ability to successfully meet them. You can further describe specific examples of challenges you have met and goals that you have achieved.