question Which of the following is a marker interface in Java

Programming

Which of the following is a marker interface in Java?

A. Runnable
B. Serializable
C. Comparable
D. Cloneable

'Serializable' is a marker interface in Java.

What is the role of the 'static' keyword in Java?

A. Create a static method
B. Create a static variable
C. Define a constant
D. Create a static class

How do you declare a constant in an interface in Java?

A. const int CONSTANT = 5;
B. final int CONSTANT = 5;
C. static final int CONSTANT = 5;
D. public final int CONSTANT = 5;

Which method is called to compare objects for equality in Java?

A. compare()
B. equals()
C. compareTo()
D. equality()

What is the purpose of the 'finalize' method in Java?

A. Garbage collection
B. Exception handling
C. Object cloning
D. Method overloading

What is the output of System.out.println("Java" == "Java");?

A. true
B. false
C. Compile error
D. Runtime error

What is the purpose of the 'default' keyword in a switch statement?

A. Execute the default case
B. Define a default value
C. Provide a default constructor
D. Specify default permissions

Which method is used to read data from the keyboard in Java?

A. read()
B. input()
C. System.in.read()
D. Scanner.next()

What is the purpose of the 'super()' constructor in Java?

A. Invoke the superclass constructor
B. Refer to the parent class
C. Invoke the subclass constructor
D. Create a superclass instance

Which of the following is a correct way to create an ArrayList in Java?

A. ArrayList arr = new ArrayList();
B. List arr = new List();
C. List arr = new ArrayList();
D. ArrayList arr = new List();

What is the output of System.out.println(10 / 3.0);?

A. 3.33
B. 3.0
C. 3
D. 3.333333