An informational interview can be a very progressive source for building and obtaining documentation when job seeking a career. For example, a specific company matches your career goals and you would like to get a job with them but you would like to know how to meet the requirements. An informational interview is the best type of resource that can benefit your needs as well as well as the human resource department of the company. Asking for this type of interview will show a company job interest and provide you the ability to build information on different careers within the company.
It would be best to follow through with some research first before scheduling an informational interview. For example, is there a specific hiring manager for the particular job you are seeking? A better suggestion of communication between the job seeker and human resource department is to send your inquiry cover letter by mail or email instead of phoning as it is more professional and ethical in the end.