Free Sun Certified Java Programmer Basic Questions and Answers

Question 1

Only one of the five Component methods listed below is also a method of the class MenuItem. Which one?

Accepted Answer

setEnabled( boolean b )

Answer

setForeground( Color c )

Answer

setVisible( boolean b )

Answer

getSize()

Question 2

Which of the java.awt.Graphics class's following methods would be used to draw the outline of a rectangle in a single method call?

Accepted Answer

drawRect()

Answer

fillPolygon()

Answer

drawLine()

Question 3

If comp is a __________, the Container methods add(Component comp) and add(String name, Component comp) will raise an IllegalArgumentException.

Accepted Answer

window

Answer

textarea

Answer

button

Question 4

Which one or ones of the following AWT classes are in charge of carrying out the components layout?

Accepted Answer

FlowLayout

Answer

LayoutManager

Answer

WindowAdapter

Question 5

If a component needs to resize vertically but not horizontally, it should go in a:

Accepted Answer

BorderLayout in the East or West location

Answer

FlowLayout as the first component

Answer

BorderLayout in the North or South location

Answer

BorderLayout in the Center location

Question 6

Which of the following best describes the order in which a component is redrawn as a result of method calls?

Accepted Answer

invoke repaint() which invokes update(), which in turn invokes paint()

Answer

invoke update which calls paint()

Answer

invoke repaint() which invokes paint directly

Answer

invoke paint() directly

Question 7

The following class(es)' methods can be used to create directories:

Accepted Answer

File

Answer

DataOutput

Answer

FileDescriptor

Answer