Part :1 - My Automation Interview Questions in one of leading MNC
Tags: automation, interview, selenium, playwright
Published: 2024-02-12 10:05:38


## Could you explain what is an interface, and how have you used it in your framework?

**Explanation:**
An interface in Java is a collection of abstract methods (methods without a body) and constants. 

It provides a blueprint for classes to implement, ensuring that those classes adhere to a specific set of methods.

Interfaces facilitate abstraction, allowing for the definition of common behaviors that multiple classes can share without the need for multiple inheritances.

Use Case:
In my automation framework, I have implemented two interfaces named Browser and Element. 

These interfaces define methods related to browser activities and Element-related activities respectively. 

We have a class called SeleniumBase in our framework, which implements these interfaces to provide an implementation for all the unimplemented methods.

> Code Snippet:
> // Interface definition
> public interface Browser {
>     public void startApp(String url, boolean headless);
>     public void switchToAlert();
> }
> public interface Element{
>     void clear(WebElement ele);
>     String getElementText(WebElement ele);	
> }
> // SeleniumBase implementing the interface
> public class SeleniumBase implements WebDriver {
>     @Override
> 	public void startApp(String url, boolean headless) {
>         // Logic to launch Chrome browser and load the url
>        
>     }
>     @Override
> 	public void switchToAlert() {
>         //Logic to switch to alert
>     }
>     @Override
> 	public void clear(WebElement ele) {
>         //Logic to  clear the value in the given text field 
>     }
>     @Override
> 	public String getElementText(WebElement ele) {
>         //Logic to get the visible text of the element
>     }
> }
In this example, the Browser and Element interfaces define methods to launch the browser and load the URL, to switch to an alert, to clear the text, and to get the visible text in the field respectively.

The SeleniumBase class implements these interfaces with specific logic.

Exception:

An exception that might occur is a WebDriverException during the initialization of the WebDriver instances if there are issues such as missing drivers or incompatible configurations. 

Another exception is NoAlertPresentException which typically occurs when trying to switch to an alert that is not present.

Challenges:

Challenge 1: 
WebDriverException during Initialization: If there are issues with missing drivers or incompatible configurations during the initialization of the WebDriver instances, it can lead to WebDriverException.

Consideration: 
We always ensure that the necessary WebDriver binaries are correctly configured and available. We also Implement proper exception handling by using a try-catch block for each method which is implemented in SeleniumBase to diagnose and address initialization issues promptly.

Challenge 2: 
NoAlertPresentException: The NoAlertPresentException can occur when attempting to switch to an alert that is not present. This might be common in scenarios where alerts are expected but not guaranteed.

Consideration: 
Implement robust alert handling mechanisms. Before switching to an alert, consider checking its presence using conditional statements. Provide optional parameters or additional methods to handle cases where alerts might not be present.

In your point of view any add on required means let discuss

TO more [selenium Interview questions](https://blog.testleaf.com/selenium-interview-questions/)

these [automation interview questions](https://blog.testleaf.com/top-automation-interview-questions/) arepublished in testleaf blog with on behalf of them am sharing with my inputs.

Thank you