Selenium Interview Questions and Answers Set 6

51. Why should Selenium be selected as a test tool?

Selenium is free and open source have a large user base and helping communities have cross Browser compatibility (Firefox, chrome, Internet Explorer, Safari etc.) have great platform compatibility (Windows, Mac OS, Linux etc.)
supports multiple programming languages (Java, C#, Ruby, Python, Pearl etc.) has fresh and regular repository developments supports distributed testing 

52. What is Selenium? What are the different Selenium components?

Selenium is one of the most popular automated testing suites. Selenium is designed in a way to support and encourage automation testing of functional aspects of web-based applications and a wide range of browsers and platforms. Due to its existence in the open source community, it has become one of the most accepted tools amongst the testing professionals.

Selenium is not just a single tool or a utility, rather a package of several testing tools and for the same reason, it is referred to as a Suite. Each of these tools is designed to cater different testing and test environment requirements.

The suite package constitutes the following sets of tools:

Selenium Integrated Development Environment (IDE) – Selenium IDE is a record and playback tool. It is distributed as a Firefox Plugin.
Selenium Remote Control (RC) – Selenium RC is a server that allows user to create test scripts in a desired programming language. It also allows executing test scripts within the large spectrum of browsers.
Selenium WebDriver – WebDriver is a different tool altogether that has various advantages over Selenium RC. WebDriver directly communicates with the web browser and uses its native compatibility to automate.
Selenium Grid – Selenium Grid is used to distribute your test execution on multiple platforms and environments concurrently. 

53. What are the testing types that can be supported by Selenium?

Selenium supports the following types of testing:
• Functional Testing
• Regression Testing 

54. What are the limitations of Selenium?

Following are the limitations of Selenium:
• Selenium supports testing of only web-based applications
• Mobile applications cannot be tested using Selenium
• Captcha and Barcode readers cannot be tested using Selenium
• Reports can only be generated using third-party tools like TestNG or JUnit.
• As Selenium is a free tool, thus there is no ready vendor support through the user can find numerous helping communities.
• User is expected to possess prior programming language knowledge. 

55. When should I use Selenium IDE?

Selenium IDE is the simplest and easiest of all the tools within the Selenium Package. Its record and playback feature makes it exceptionally easy to learn with minimal acquaintances to any programming language. Selenium IDE is an ideal tool for a naïve user. 

56. What is Selenese?

Selenese is the language which is used to write test scripts in Selenium IDE. 

57. What are the different types of locators in Selenium?

Locator can be termed as an address that identifies a web element uniquely within the webpage. Thus, to identify web elements accurately and precisely we have different types of locators in Selenium:
• ID
• ClassName
• Name
• TagName
• LinkText
• PartialLinkText
• Xpath
• CSS Selector
• DOM 

58. What is difference between assert and verify commands?

Assert: Assert command checks whether the given condition is true or false. Let’s say we assert whether the given element is present on the web page or not. If the condition is true then the program control will execute the next test step but if the condition is false, the execution would stop and no further test would be executed.

Verify: Verify command also checks whether the given condition is true or false. Irrespective of the condition being true or false, the program execution doesn’t halts i.e. any failure during verification would not stop the execution and all the test steps would be executed. 

59. What is an Xpath?

Xpath is used to locate a web element based on its XML path. XML stands for Extensible Markup Language and is used to store, organize and transport arbitrary data. It stores data in a key-value pair which is very much similar to HTML tags. Both being markup languages and since they fall under the same umbrella, Xpath can be used to locate HTML elements.
The fundamental behind locating elements using Xpath is the traversing between various elements across the entire page and thus enabling a user to find an element with the reference of another element. 

60. What is the difference between “/” and “//” in Xpath?

Single Slash “/” – Single slash is used to create Xpath with absolute path i.e. the xpath would be created to start selection from the document node/start node.
Double Slash “//” – Double slash is used to create Xpath with relative path i.e. the xpath would be created to start selection from anywhere within the document.