NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
NOC24-CS105 (July-2024 24A)
PROGRAMMING IN JAVA
Assignment 9
TYPE OF QUESTION: MCQ
Number of questions: 10 Total marks: 10 × 1 = 10
QUESTION 1:
Which of the following is a one‐line input field that allows the user to choose a number or an object
value from an ordered sequence?
a. JTextarea
b. Jtex ield
c. Jspinner
d. Jslider
Correct Answer:
c. Jspinner
Detailed Solu on:
A JSpinner is a one‐line input field that allows the user to choose a number or an object value from an
ordered sequence.
NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
QUESTION 2:
What is true about the following code.
import javax.swing.*;
public class Nptel {
public static void main(String[] args) {
JFrame frame = new JFrame("My Frame");
frame.add(new JButton("OK"));
frame.add(new JButton("Cancel"));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(200, 200);
frame.setVisible(true);
}
}
a. Both “OK” and “Cancel” bu on is added, but only “Cancel” bu on is visble.
b. Only “OK” bu on is added and visible, “Cancel” bu on is not added.
c. Only “Cancel” bu on will be added and visible, “OK” bu on is not added.
d. Code throws an ERROR.
Correct Answer:
a. Both “OK” and “Cancel” bu on is added, but only “Cancel” bu on is visble.
Detailed Solu on:
By default, the layout of the content pane in a JFrame is BorderLayout. Bu on OK is placed in the center
of content pane, then bu on Cancel is placed in the same place. So you only can see bu on Cancel.
NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
QUESTION 3:
Which of the following is a container for other components and is used to build bespoke panels for
organizing and arranging components?
a. JPanel
b. JFrame
c. JCombo
d. JBox
Correct Answer:
a. JPanel
Detailed Solu on:
JPanel is a container for other components and is used to build bespoke panels for organizing and
arranging components.
NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
QUESTION 4:
Which of the following component gives a drop‐down list of options from which to choose?
a. JPanel
b. JBu on
c. JComboBox
d. Jbox
Correct Answer:
c. JComboBox
Detailed Solu on:
JComboBox component gives a drop‐down list of op ons from which to choose.
NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
QUESTION 5:
Which of the following Swing components inherently support the WindowListener interface?
a. Swing frames (JFrame)
b. Swing checkboxes (JCheckBox)
c. None of these
d. Swing combo boxes (JComboBox)
Correct Answer:
a. Swing frames (JFrame)
Detailed Solu on:
Swing frames (JFrame) and Swing dialogs (JDialog) Swing components inherently
support the WindowListener interface.
NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
QUESTION 6:
Which class in Swing provides a graphical way to display images, icons, or custom graphics?
a. JImage
b. JLabel
c. JImageIcon
d. JDialog
Correct Answer:
b. JLabel
Detailed Solu on:
JLabel is used to display images, icons, or custom graphics.
NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
QUESTION 7:
What is/are the way(s) to create a Frame in Java Swing?
a. By crea ng the object of Frame class (associa on)
b. None of these
c. By impor ng a package named JFrame
d. By declaring a class with name JFrame
Correct Answer:
a. By crea ng the object of Frame class (associa on)
Detailed Solu on:
We can create a frame component by crea ng the object of Frame class (associa on) and by extending
Frame class (inheritance).
NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
QUESTION 8:
Which method is used to set the graphics current color to the specified color in the graphics class?
a. public abstract void setFont(Font font)
b. public abstract void setColor(Color c)
c. public abstract void drawString(String str, int x, int y)
d. None of the above
Correct Answer:
b. public abstract void setColor(Color c)
Detailed Solu on:
The method used to set the graphics current color to the specified color in the Graphics class is:
public abstract void setColor(Color c).
NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
QUESTION 9:
When are the keyboard events fired?
a. When the user manually calls the bu on
b. When the user right clicks the mouse
c. When the user calls the modifier
d. When the user clicks a key
Correct Answer:
d. When the user clicks a key
Detailed Solu on:
The keydown and keyup are the keyboard events are fired when the user presses or releases a key on
the keyboard. They are generated for modifier keys, func on keys, and alphanumeric keys.
NPTEL Online Certification Courses
Indian Institute of Technology Kharagpur
QUESTION 10:
Which of the following function is used to specify the layout of a container.
a. UseLayeout()
b. setLayout()
c. layout()
d. DesignLayout()
Correct Answer:
b. setLayout()
Detailed Solu on:
The setLayout() func on is used to specify the layout of a container.
