A mask layer ____.
A. hides the contents of the layer below it
B. can be used to create a highlight effect
C. both a. and b.
D. neither a. nor b.
Answer: C
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Answer the following statements true (T) or false (F)
1. On a traditional IBM mainframe, when an I/O operation is finished, the channel signals the main processor and reports its status to the operating system through the channel status word or CSW. 2. On a traditional IBM mainframe, the signal that flashes from a channel to the processor is called an interrupt. 3. A traditional IBM mainframe’s hardware responds to an interrupt signal by switching PSWs. 4. On a traditional IBM mainframe, the old PSW is the special register that holds the address of the next instruction to be executed. 5. On a traditional IBM mainframe, the old PSW is located in a special register.
Create the GUI
