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Some important interview question and answers on queries in axapta technical

Q) why do we use queries? Ans:queries are user interactive, faster, compiles, reusable components query, queryrun,querybuilddatasource,querybuildrange if(qr.prompt()) Q) what is difference between temporary table and container??? Ans:when there  are more than 50 columns then  we go for  temp tables and also there are some advantages using temp tables - we can create index, methods , fieldgroups Q) How  do u share tables across the companies???? Ans: Tablecollections and virtual companies Q) when is configuration key used?? Ans:To  enable  and disable the features for all  users [tables, fields, indexes, form controls, edt.enum...etc] Security  key   for   set  of  users  or  usergroups - tables, forms, report, menuitems etc RLS [Record level security] Q) What are display methods? Ans:Display  methods  will help you to show the data from some other table or hard-coded strings..these are not bound controls and we cannot use filter or sorting option