In CS6, what is the shortcut for applying a feather to a selection that has already been created?

If you use the eraser tool on a black layer mask with white foreground and black background colors, what is the result?

Which one will rotate the canvas?

Maximum number of History States?

Which tool prevents you from clicking Fade on the Edit menu?

What rasterizing engine Photoshop uses for rendering font?

Which option replaces the color of any edge pixels with the color of pixels farther in from the edge of the selection?

There is a standard shortcut to invoke the Flatten Image command.

A hollow/white lock icon in the Layers panel means:

.... is the best choice to make a precise color adjustment to an individual channel of a image.

NOT a valid Sample Size when using the Eyedropper tool?