PYTHON QUESTIONS

16. In this code segment transferName is _____.

btn1 = Button(root, text='Move Name', command=transferName) btn1.grid(row=1, column=0, padx=3, pady=9)

The containing element for the widget

The name of the event-handling function called when the element is clicked

The name of the variable that represent any data entered in the widget

Is the name of the layout manager used by the widget

17. What type of method is used to extend or replace the functionality of the superclass method?

Concrete method

Abstract method

Overriding method

Constructor method

18. You can associate a mouse event and an event-handling method with a widget by calling the ____ method.

assign

associate

bind

link

19. What must be included in the subclass constructor as the first statement?

Initialization of all instance variables

A call to the superclass constructor

A call to the accessor and mutator methods

A call to the subclass constructor

20. To activate a button and enable it to respond to mouse clicks, you must set its command attribute to a(n) ____ method.

label

widget

trigger

event-handling

21. Which of the following statements about superclasses and subclasses is true?

A superclass is larger than its subclass.

A superclass inherits from a subclass.

A superclass extends a subclass.

A subclass extends a superclass.