What is the role of methods in a Java class?
To store data associated with an object
To control the visibility of class members
To define the blueprint for creating objects
To perform actions or operations on an object's data
What is the base case in a recursive function?
The initial call to the function.
The most complex part of the recursion.
The condition that stops the recursion.
The return statement of the function.
Why would you create a custom exception class in Java?
To avoid handling exceptions altogether.
To modify the behavior of existing Java exception classes.
To represent specific exception scenarios relevant to your application.
To improve the performance of exception handling.
Which of the following is NOT a valid way to declare an array in Java?
int[] arr;
int arr[] = new int[5];
int arr[];
int []arr;
Which method is used to remove an element at a specific index from an ArrayList?
discard()
delete()
remove()
extract()
What is the base class for all checked exceptions in Java?
RuntimeException
Exception
Throwable
Error
Which access modifier allows a class's members to be accessed from anywhere?
private
public
default
protected
What is the primary purpose of a method in Java?
To define a class
To control program flow
To perform a specific task
To store data
What is the core principle behind Object-Oriented Programming (OOP) in Java?
Code reusability
Data security
Improved memory management
Faster execution speed
What is the primary purpose of a constructor in Java?
To initialize object attributes
To control access to class members
To declare variables
To define methods