If you make a mistake, you can go back and undo the error. What is the keyboard shortcut for undo?
What will be an ideal response?
You can back up one step at a time using the keyboard shortcut Control+Z
(Windows) or Command+Z (Mac). You can also access the Undo and Redo
commands in the Edit menu, and use the History panel. There are up to 101
levels of undo and redo in the History panel (accessed by going to the panel
menu).
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Answer the following statements true (T) or false (F)
1) In C++, an exception object can be a user-defined type or any type that is built-into C++ language. 2) In C++ an exception object must be derived from the exception class defined in the standard library. 3) An exception is signaled or raised with the keyword catch followed by an exception object that may be of any C++ type. 4) The context in which the throwing of an exception is detected is the try block.
Write a Java method that returns the value of PI, where PI = 3.1415926535.
What will be an ideal response?
How are MAC addresses represented?
A. Using 32 binary digits B. Using 12 hexadecimal characters C. As an IP address D. As a DNS name
When a method returns an array reference, you include ____ with the return type in the method header.
A. { } B. ( ) C. < > D. [ ]