Hii ..my field is qc so asked to me the question related to qc and which field have you worked before and how many experiences you have.. so asked to me the question qc related instruments like IR, Uv, Dissolution Aparatus, KF, DT and Friability... First of all u know the basic principle of all instruments and why we use them. This very important thing almost all question asked about principles and why we use that....thank u