What is Transient keyword in Java?

What is Covariant Return Type in Java?

What are Generics in Java, have you used anywhere in your automation code?

What is Abstraction and Interfaces? Differences ? Why one is better preferred and why?

Write test cases for this below code? class Product { private String name; private double price; public Product(String name, double price) { this.name = name; this.price = price; } public String getName() { return name; } public double getPrice() { return price; } } class ShoppingCart { private List items; public ShoppingCart() { items = new ArrayList<>(); } public void addItem(Product product) { items.add(product); } public List getItems() { return items; } public double calculateTotal() { double total = 0; for (Product item : items) { total += item.getPrice(); } return total; } } class DiscountManager { public double applyDiscount(ShoppingCart cart, double discountRate) { double total = cart.calculateTotal(); return total * (1 - discountRate); } } public class Main { public static void main(String[] args) { Product product1 = new Product("Laptop", 1000); Product product2 = new Product("Mouse", 20); ShoppingCart cart = new ShoppingCart(); cart.addItem(product1); cart.addItem(product2); DiscountManager discountManager = new DiscountManager(); double discountedPrice = discountManager.applyDiscount(cart, 0.1); System.out.println("Discounted price: " + discountedPrice); } }

Anything wrong in this code and Explain? import java.util.ArrayList; import java.util.Iterator; import java.util.List; public class ConcurrentModificationExample { public static void main(String[] args) { List numbers = new ArrayList<>(); numbers.add(1); numbers.add(2); numbers.add(3); Iterator iterator = numbers.iterator(); while (iterator.hasNext()) { Integer number = iterator.next(); if (number.equals(2)) { numbers.remove(number); } } } }

What is Explicit Wait and in which conditions you have used in your automation testing? Write the code for that?

What are class loader and class.forname in Java?