To facilitate the retrieval of specific records from a file, one field in each record is chosen as a __________.
Fill in the blank(s) with the appropriate word(s).
record key.
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A value or expression that provides input to a function is called a(n)
a. prompt b. conversion c. argument d. insertion operation
Answer the following statements true (T) or false (F)
1) All virtual functions in an abstract base class must be declared as pure virtual functions 2) Referring to a derived-class object with a base-class handle is dangerous. 3) A class is made abstract by declaring that class virtual. 4) If a base class declares a pure virtual function, a derived class must implement that function to become a concrete class. 5) Polymorphic programming can eliminate the need for switch logic.
Find the error(s) in the following code, which should handle the event that occurs when the value in itemsJSpinner changes.
``` 1 itemsJSpinner.addChangeListener( 2 3 new ChangeListener() // anonymous inner class 4 { 5 // event handler called when value in itemsJSpinner is changed 6 public void valueChanged( ChangeEvent event ) 7 { 8 itemsJSpinnerValueChanged( event ); 9 } 10 11 } // end anonymous inner class 12 13 ); // end call to addChangeListener ```
The name attribute has replaced the id attribute in XHTML
Indicate whether the statement is true or false