1.How can we can select the options from drop down ?
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*By using Select class,we can select the options from single select and multi select dropdown.

2.Whether Select is a interface or class?
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*Select is a class.

3.Write a code to print all the options in DropDown?
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*getOptions() method is used to get all options in dropdown.
* getOptions() method will return List<WebElement> then iterating each WebElement and using getText() method
 we can print all the dropdown  values.

4.Can we select multiple values in DropDown?
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*Yes,we can select multiple values in a DropDown if it is a multiselect dropdown.

5.How to check the dropdown is single select or multi select dropdown?
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*isMultiple() method from Select class can be used to check whether the dropdown is single select 
or multi select dropdown 

6.What are the methods available in select class?
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*selectByValue();
*selectByVisibleText();
*selectByIndex();
*getOptions();
*getAllSelectedoptions();
*getFirstselectedoptions();
*isMultiple();
*deSelectByValue();
*deSelectByVisibleText();
*deSelectByIndex();
*deSelectAll()            

7.can we deselect the options in dropdown?
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Yes, we can deselect the options in  dropdown using the below methods.
*deSelectByValue();
*deSelectByVisibleText();
*deSelectByIndex();
*deSelectAll()

8.Write a code to print selected options in dropdown?
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*By using getAllSelectedoptions() method we can get all the selected WebElements.
Select refName = new Select(); 
refName.getAllSelectedoptions();

*getAllSelectedoptions() method will return List<WebElement> then iterating each WebElement and using getText() method 
we can print all the selected options from dropdown.

9.Write the return type of all methods available in Select class?
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*selectByValue()            -void
*selectByVisibleText()      -void
*selectByIndex()            -void
*getOptions()               -List<WebElement>
*getAllSelectedoptions()    -List<WebElement>
*getFirstselectedoption()  -WebElement
*isMultiple()               -boolean
*deSelectByValue()          -void
*deSelectByVisibleText()    -void
*deSelectAll()              -void
*deSelectByIndex()            -void

10.What is the purpose of windows Handling?
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*Whenever we have multiple windows,to switch the program control between different windows,
you can go for windows handling concept in Selenium.

We can perform switch the control between windows in 3 ways:
*using window title
*using window url
*using window id

11.Write a method used  to get the window id of all the windows opened?
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*Set<String> refname= driverRefName.switchTo.getWindowsHandles();


12.What are the different types of arguments you can pass in windows()?
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*id
*url
*title

But all the arguments are of String type.

13.When you have multiple windows opened ,how to directly switch from parent window to  8 th child window?
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List<String> allWindowsId=(List<String>)driver.getWindowHandles();
driver.SwitchTo().window(allWindowsId.get(7));