IEntityQuery<Zip> qryZips = new EntityQuery<Zip> ()                             .Where<Zip> ( p => p.State.StartsWith ( "CA" ) );

So all California zip codes are in cache now.

What would happen if I execute the same query with order by criteria while displaying them in grid on UI. 

   CompositeSortSelector OrderByCriterion = new SortSelector ( typeof ( Zip ), "City", ListSortDirection.Ascending )                               .ThenBy ( "Code", ListSortDirection.Ascending );


IEntityQuery<Zip> qryZips = new EntityQuery<Zip> ()                             .Where<Zip> ( p => p.State.StartsWith ( "CA" ) )
                           .OrderBySelector<Zip> ( OrderByCriterion ); Is it going to hit the database OR will pull the entities from cache and will apply necessary sort criterion?