Summary Packages

UNIT 4 MCQ QUESTIONS




1) How many ways are there to access package from another package?



A) 3

B) 2

C) 1

D) 5

ANSWER: A) 3

2) In the following which package is used for analyzing code during run time?



A) java.lang.reflect

B) java.awt

C) java.io

D) java.applet

ANSWER: A) java.lang.reflect

3) Which of these package is used for graphical user interface?

a) java.applet

b) java.awt

c) java.awt.image

d) java.io

Answer: b

4) What is the length of the application box made in the following Java program?

Import java.awt.*;

Import java.applet.*;

Public class myapplet extends Applet

{

, Graphic g;

g.drawString(“A Simple Applet”,20,20);

}

a) 20

b) Default value

c) Compilation Error

d) Runtime Error

View Answer

Answer: c

5) What is an event in delegation event model used by Java programming language?

a) An event is an object that describes a state change in a source

b) An event is an object that describes a state change in processing

c) An event is an object that describes any change by the user and system

d) An event is a class used for defining object, to create events

Answer: a

6) Which of these methods are used to register a mouse motion listener?

a) addMouse()

b) addMouseListener()

c) addMouseMotionListner()

d) eventMouseMotionListener()

Answer: c

6) Event class is defined in which of these libraries?

a) java.io

b) java.lang

c) java.net

d) java.awt.event

Answer: d

7) Which of these events will be notified if scroll bar is manipulated?

a) ActionEvent