Which protocol is used for diagnostics and provides error messages?

What are the reasons to create an instance of the File class?

a. To determine whether the file exists. b. To obtain the properties of the file such as whether the file can be read, written, or is hidden. c. To rename the file. d. To delete the file. e. To read/write data from/to a file

How can noise be added to an image?

A. Click Filters on the Menu bar, then choose Add Noise. B. Click Filter on the Menu Bar, point to Noise, then click Add Noise. C. Choose Add Noise from the Filter menu on the Tools panel. D. Click Tools on the Menu bar, choose Filter, then click Add Noise.