Operating System (OS)
You can switch from one program to another by clicking within the desired program's icon from the

Application icon from taskbar
Folder
None of above
Application icon on desktop

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Operating System (OS)
Addressing modes

defines the fundamental method of determining effective operand addresses
None of these
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
All of these
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.

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Operating System (OS)
Link encryption

is more secure than end-to-end encryption
None of these
can not be used in a public network
is less secure than end-to-end encryption
is used only to debug

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