100 Selenium Webdriver interview questions with answers by www.jobinterviewquestionswithanswers.blogspot.com

100 Selenium Webdriver interview questions with answers by http://jobinterviewquestionswithanswers.blogspot.in/

1.  Difference between Absolute path & Relative path.

Absolute path will start with root path (/) and Relative path will from current path (//)

Absolute xPath : /html/body/div[3]/div[2]/div[2]/div[2]/div[2]/div[2]/div[2]/div/div[4]/div[1]/div/div[@id='main']/div[@id='Blog1']/div[1]/div[1]/div/div[1]/div/h3/a

Relative xPath : //h3/a[text()='Working on New Window']

2.  Tell me some TestNG Annotations.

@Test,@Parameters,@Listeners,@BeforeSuite,@AfterSuite,@BeforeTest,@AfterTest,
@DataProvider,@BeforeGroups,@AfterGroups,@BeforeClass,@AfterClass,
@BeforeMethod,@AfterMethod,@Factory

http://testng.org/doc/documentation-main.html#annotations

3.  What are desired capabilities?

Desired Capabilities help to set properties for the Web Driver. A typical use case would be to
set the path for the Firefox Driver if your local installation doesn't correspond to the default
settings.

https://code.google.com/p/selenium/wiki/DesiredCapabilities

4.  Difference between Selenium RC and Selenium Web driver.

 Difference between Selenium RC and Selenium Web driver.

Selenium RC	Selenium Web driver
Selenium RC’s architecture is way more complicated.	Web Driver’s architecture is simpler than Selenium RC’s.
Selenium RC is slower since it uses a JavaScript program called Selenium Core.This Selenium Core is the one that directly controls the browser, not you.	Web Driver is faster than Selenium RC since it speaks directly to the browser uses the browser’s own engine to control it.
Selenium Core, just like other JavaScript codes, can access disabled elements.	Web Driver interacts with page elements in a more realistic way.
Selenium RC’s API is more matured but contains redundancies and often confusing commands.	Web Driver’s API is simpler than Selenium RC’s. It does not contain redundant and confusing commands.
Selenium RC cannot support the headless HtmlUnit browser. It needs a real, visible browser to operate on.	Web Driver can support the headless HtmlUnit browser.
Selenium RC Has Built-In Test Result Generator. Selenium RC automatically generates an HTML file of test results.	Web Driver has no built-in command that automatically generates a Test Results File.
Selenium RC needs the help of the RC Server in order to do so.	web Driver directly talks to the browser
Selenium RC can support new browsers	It cannot readily support new browsers

5.  Difference between Web driver listener and  TestNG Listener.

TestNG and Web driver Listener have different interfaces to implement and call them. They both
modify respective behaviour. You can use Listeners in Annotation. Below 2 URL gives the
 detailed  list of listener and their interfaces.

http://testng.org/doc/documentation-main.html#testng-listeners

http://selenium.googlecode.com/git/docs/api/java/org/openqa/selenium/support/events/
AbstractWebDriverEventListener.html

6. Describe your framework.

Refer automation link

7.  Which is the best way to locate an element?

Finding elements by ID is usually going to be the fastest option, because at its root, it eventually calls down to document.getElementById(), which is optimized by many browsers.

Finding elements by XPath is useful for finding elements using very complex selectors, and is the most flexible selection strategy, but it has the potential to be very slow, particularly in IE. In IE 6, 7, or 8, finding by XPath can be an order of magnitude slower than doing the same in Firefox. IE provides no native XPath-over-HTML solution, so the project must use a JavaScript XPath implementation, and the JavaScript engine in legacy versions of IE really is that much slower.

If you have a need to find an element using a complex selector, I usually recommend using CSS Selectors, if possible. It's not quite as flexible as XPath, but will cover many of the same cases, without exhibiting the extreme performance penalty on IE that XPath can.

8.  Why we refer Firefox driver to the web driver  inheritance. 

web Driver driver = new FireFoxDriver();

WebDriver is an interface which contain several abstract methods such as get(...), findElamentBy(...) etc.

We simply create reference of web Driver and we can assign objects (Firefox driver, CromeDriver, IEDriver, Andriod driver etc) to it.

Ex :

WebDriver driver = new FireFoxDriver();-----------(1)

If we are using (1) we can do the same thing by using

FireFoxDriver driver = new FireFoxDriver();---------(2)

We can use (1) and (2) for same purpose but if we want to switch to another browser in same program

then again we have to create the object of other class as for example

CromeDriver driver = new CromeDriver();.

creating object of several class is not good. So we create the reference of WebDriver and

we assign the objects of another class as for example

WebDriver driver; // it is created only one time in the program

driver = new FireFoxDriver();// any where in the program

driver = new CromeDriver(); // any where in the program

9.  What are the features of TestNG?

TestNG is a testing framework designed to simplify a broad range of testing needs, from
unit testing (testing a class in isolation of the others) to integration testing (testing entire
systems made of several classes, several packages and even several external frameworks,
 such as application servers). You can use test suite,annotations, automatically generation
 of report and much more.

10.   What is the difference between thread.Sleep()  and selenium. Set Speed ("2000")?

If the application is taking time to load the page then we use selenium.waitforpageload(" "). This command is doesn’t wait upto the given time whenever the page load is completed.

If the application is taking time to refresh the page, then we use Thread. Sleep ( ).it is a standard wait it simply wait to the given time.

selenium.setSpeed

 1. Takes a single argument in string format

 Ex: selenium.setSpeed("2000") - will wait for 2 seconds

 2. Runs each command in after setSpeed delay by the number of milliseconds mentioned in set Speed.

 thread.sleep

 1. Takes a single argument in integer format

 ex: thread. Sleep(2000) - will wait for 2 seconds

 2. Waits for only once at the command given at sleep.

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