Selenium with Java 45 - How to handle html Modal Windows

How to handle html Modal Windows?

What is a modal window?
A modal window is dialog that forces the user to interact with it before they can go back to using the parent application.

Possible Interview Questions on switching to modal window in selenium webdriver:
How to handle modal window ?

Code :
@Test
public void ModalWindow() throws InterruptedException
{
WebDriver driver = new FirefoxDriver();

//driver.FindElement(By.XPath("//button[text()='Ok']")).Click();

}

[RudrashishBose]

Wonderful tutorial ma'am, this was exactly what i was tripping up on! :D

[senthilnatarajan]

what is the difference between Confirm Alert and Modal window, looks like both are same?

[sijijaison]

suppose on clicking the button, sometimes the modal box is displayed .sometimes not how to handle that situation. can we use try catch ?

[shaiksharif]

can you please show me how to close the flipkart website modal popup.i am struggling from past 5 days to close that modal pop for login in flipkart.