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Assuming you are in learning process while this is not right for you that you get all answers without reading your study materials. Please keep in mind that, there is no shortcut to climb a mountain. You have to read your study materials as well as follow some external books also that help to gather a solid knowledge, which provides you confident in front of interviewer for your job interview.
Here is a good reference, 'Health Information Management Technology', by Nanette B Sayles