These two main categories have been further subdivided into different types of interviews which range from telephone interview to the most common which is a face-to-face interview. Telephone interviews are carried out through the telephone. It is most common in cases where the respondent is far probably in another country or is too busy to grant a face to face interview. The face-to-face interview is where the interviewer and the participant face each other and the series of questions and answers exchanged (Stewart, Chadwick & Gill, 2008, pg. 292). The interview has several strengths and weaknesses depending on the type.