0 votes 0 votes In order to use a DBMS, it is important to understand A. the physical schema B. all sub-schemas that the system supports C. one subschema D. both (a) and (b) E. None of the above Databases ssc-imd databases + – rishu_darkshadow asked Dec 7, 2017 rishu_darkshadow 155 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.