problems regarding NIOS 2 hardware development tutorial

cpu name is the name of the nios 2 processor in the sopc design.Once you put the .sopc file in the box above it it will automatically show the cpu name in the box.one need not write it.

The .sdc file is in your folder where you have stored the project.It is automatically generated but you have to add it.While adding the file , in the file types select all files or sdc file type and add it to the project.you cant see it coz by default the file type is set to .qpf

so you can see only qpf file.change the file type while selection of the file