Briefly describe the XIO instruction.
What will be an ideal response?
ControlLogix family members use the term examine if open (XIO) to represent the normally closed instruction. The XIO instruction tells the controller to test for an OFF condition from the referenced tag bit. If the controller sees an OFF condition, then the instruction is true. The abbreviation XIO is called the instruction's mnemonic.
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The fundamental rule for testing functions requires that every function be tested in an already fully tested and debugged program. How can this be accomplished?
a) Impossible! The main function must have all the functions it calls attached to get it to compile and run properly. b) The main function is tested with stub functions replacing each` function. c) Write drivers for the stub functions to test them. d) Add each non-stub function in turn for testing. e) Write drivers for the function implementations one at a time to test them independently.
The ________ pane is located to the left of the SmartArt graphic pane
A) Design B) Layout C) Format D) Text
Scroll bars appear on the ____ of the document window.
a. right and bottom b. left and bottom c. right and top d. left and top
Matches between a keyword search and resulting occurrences are called ______.
A. hits B. keywords C. tags D. metasearches