Hi Selvakumar,
For your 1st question my answer is No, When you load the master data and attributes from BW info object it consist lot of attributes and it’s not possible to load entire attributes at a time,so without set selection it’s not possible to load the master data and attributes.The purpose of the set selection option is lot. The master data can be filtered by values or by hierarchy selection and it can be combined AND or OR relationships. The set selection is filter criteria where user can select specific attributes for import. Key date selection is also use when reading time-dependent source master data and texts.
Khokan