Selenium Interview Questions and Answers

• It is free and open source
• Has large user base and online communities
• Cross-browser compatibility
• Platform compatibility
• Supports most of the programming languages

The Selenium suite includes 4 set of tools:

1. Selenium Integrated Development Environment (IDE): It is a record and playback tool, which is distributed as a Firefox Plugin.

2. Selenium Remote Control (RC): It is a server that allows users to create test scripts in the programming language of their choice. It also allows developers to execute test scripts cross browsers.

3. Selenium WebDriver: This tool communicates directly with the browser and uses native compatibility to automate.

4. Selenium Grid: It is used to distribute test execution on multiple platforms and environments

Selenium supports two types of testing - Functional Testing and Regression Testing.

It is the easiest and simplest tool in the Selenium Package. Two features - record and playback - make this tool very easy to learn with minimum knowledge of other programming languages. Selenium IDE is the best tool for new users.

It is the language for writing test scripts in Selenium IDE.

The locator is an address that identifies a web element within the page. Different types of locators are used to identify different web elements accurately in Selenium:

• ID
• ClassName
• Name
• TagName
• LinkText
• PartialLinkText
• Xpath
• CSS Selector
• DOM

XPath can help the developers locate web elements based on their XML path. The logic behind establishing HTML elements using XPath is the crossing between different parts across the page, which enables a user to find the item through the reference to another aspect.

If you are preparing for Selenium interviews, you can have a look at our Advanced Selenium Interview Questions for better insight.

You are expected to know this information during Selenium Interview Questions With Answers.

Selenium Grid is used for executing test scripts on multiple platforms and cross-browsers simultaneously to achieve distributed test execution under different environments, thus saving program execution time.

Selenium RC and WebDriver, when combined, are known as Selenium 2. Selenium RC is also known as Selenium 1.

Two types of waits are available in WebDriver - Implicit Wait and Explicit Wait.

Implicit waits provide default waiting time between each consecutive test step across the test script. Therefore, subsequent test steps will execute only when the waiting time has elapsed after the previous test step.

Explicit waits halt the execution till the time a given condition is met or the maximum wait time has elapsed. Unlike Implicit wait, the explicit wait can be applied only in particular instances.

findElement(): This is used to find the first element on the existing web page matching the specified locator value. You must remember that only first matching element will be fetched.

findElements(): This is used to find all of the elements in the existing web page matching the specified locator value. You must remember that all of the matching elements will be fetched and saved in the WebElements list.

No. Selenium is an automation testing tool that only supports web application testing. It cannot handle Windows pop-ups.

This is one of the frequently asked Selenium Interview Questions.

WebDriver offers an efficient way to handle web-based pop-ups using the Alert interface. Developers can use the below mentioned four methods, along with the Alert interface, for treating web-based pop-ups:

• void dismiss(): Accept() way clicks “Cancel” when window pop-ups appear.
• void accept(): Accept() method clicks “Ok” button when window pop-ups appear.
• String getText(): GetText() method returns the text shown on alert box.
• void sendKeys(String stringToSend): SendKeys() method enters specified string pattern into alert box.

It is a unit testing framework, which was introduced by Apache. This framework is based on Java.

Following are JUnit Annotations:

• @Test: This annotation tells the system that any method that is annotated as @Test is test method. You can have multiple test methods in one script.
• @Before: This shows the system that this method will be executed every time before the test method.
• @After: This method tells the system that this method will get performed every time after the test method.
• @BeforeClass: This method determines the system that this method will get performed once before any of the test methods.
• @AfterClass: This method determines the system that this method will get performed once after the test method.
• @Ignore: It shows the system that this method will not be implemented.

TestNG is an advanced framework that helps both developers and testers leverage the benefits. An open source framework, it is distributed under the Apache Software License.

These features make TestNG better than Junit:

• Tests to confirm the code is multithread safe
• Supports data-driven testing
• Supports parameters
• Includes a variety of tools and plug-ins
• Flexible test configuration
• Possible to set test case dependencies