Answer / sunitha

Physical layer-The physical layer provides the physical
query layer and is made up primarily of data source and
stored procedure query subjects .It acts as a foundation for
presentation layer.

Presentation layer-The presentation layer makes it easier
for report authors to find and understand their data .The
presentation layer is made up primarily of model query
subjects that you create

Answer / dipika gupta

Physical layer is responsible for bit by bit transfer of data reliably, and also support the electrical and mechanical specifications of a link..
whereas the domain of presentation layer covers the compatibility between computers with different internal data format/ o.s... as well as data encryption and decryption for security. compression and decompression also comes under the responsibility of the presentation layer..

diff b/w layout calculation and query calculation

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