Web Design and Development MCQs with Answers
Practice important Web Design and Development MCQs with answers and explanations.
Multiple Choice Questions
Q41: Which class is used to take input from a GUI in Java?
- A: Scanner
- B: JOptionPane
- C: InputStream
- D: BufferedReader
View Answer
B
Q42: In the InputOutputTest class, what method is used to display a message in a dialog box?
- A: showInputDialog
- B: showMessageDialog
- C: printMessage
- D: displayMessage
View Answer
B
Q43: What does the parseInt method do in Java?
- A: Converts String to int
- B: Converts int to String
- C: Converts String to double
- D: Converts double to int
View Answer
A
Q44: Which Java data type is used to store true or false values?
- A: int
- B: boolean
- C: char
- D: float
View Answer
B
Q45: How do you convert a String to a double in Java?
- A: Double.parseDouble(value)
- B: Float.parseFloat(value)
- C: Integer.parseInt(value)
- D: Boolean.parseBoolean(value)
View Answer
A
Q46: What does a class in Java represent?
- A: A blueprint for objects
- B: A method for calculations
- C: A type of variable
- D: A static method
View Answer
A
Q47: What is the purpose of a constructor in Java?
- A: To initialize an object
- B: To destroy an object
- C: To print object data
- D: To define static variables
View Answer
A
Q48: How are object attributes typically accessed outside the class?
- A: Directly
- B: Through getters and setters
- C: Using public access
- D: Through static methods
View Answer
B
Q49: What keyword is used to restrict access to a class member only within the same class?
- A: protected
- B: private
- C: public
- D: default
View Answer
B
Q50: In Java, which method is automatically called to initialize an object?
- A: finalize()
- B: toString()
- C: constructor
- D: init()
View Answer
C