Question

Topic: JAVA

18) Abstract methods are used when defining

A) interface classes

B) derived classes

C) classes that have no constructor

D) arrays

E) classes that have no methods

32) Which of the following GUI classes requires that it have a LayoutManager before any GUI components are added to it?

A) JButton

B) JSlider

C) JPanel

D) JFrame

E) both C and D but not A or B

33) In using the BoxLayout, adding space between components in a container can be accomplished by

A) including TabbedPanes

B) including JButtons that have no names and thus will appear invisible

C) adding invisible components

D) inserting IconImages of blank images

E) any of the above

34) In order to display three components vertically in a container, you could use all but which of the following layout managers?

A) FlowLayout

B) BoxLayout

C) GridLayout

D) BorderLayout

E) you could use any of the above

35) What is wrong with the following message to create a BoxLayout for the JPanel jp?

      jp.setLayout(new BoxLayout(BoxLayout.X_AXIS));

A) X_AXIS is not a valid constant for BoxLayout, it should instead be HORIZONTAL

B) Aside from X_AXIS, the constructor also requires a Dimension to determine the size of the Box

C) Aside from X_AXIS, the constructor also needs a command regarding horizontal glue as in createHorizontalGlue( )

D) The BoxLayout constructor is lacking a reference to the container that the BoxLayout manager will govern

E) There is nothing wrong with it at all