The code for testing whether the stack is empty is
A stack based on a linked list is based on the following code
```
class Node
{
String element;
Node next;
Node(String el, Node n)
{
element = el;
next = n;
}
}
Node top = null;
```
A) return top == null;
B) return top = null;
C)
if (top == null)
return true;
else throw new RunTimeException();
D)
if (top == 0)
return true;
else
return false;
A) return top == null;
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a. arranges GUI components into layers such that only one layer is visible at a time. b. allows users to access a layer of GUI components via a tab. c. extends JComponent. d. All of the above.
The keyboard's sensitivity can be adjusted only by the manufacturer.
Answer the following statement true (T) or false (F)
Behavioral diagrams include all of the following except:
A) activity diagrams. B) communication diagrams. C) class diagrams. D) use case diagrams. E) sequence diagrams.
A placeholder for unknown characters in the criteria of a query is called a(n) ________
Fill in the blank(s) with correct word