Perficient Front end Web Developer Interview Questions, Process, and Tips

Promises are used in JavaScript to handle asynchronous operations and avoid callback hell.

• Promises are used to handle asynchronous operations in a more readable and manageable way.

• They help avoid callback hell by chaining multiple asynchronous operations together.

• Promises can be in one of three states: pending, fulfilled, or rejected.

• They allow for better error handling with the use of .catch() method.

• Promises can be c...read more

Modules in AEM are reusable components that can be used to build web pages and applications.

• Modules in AEM are reusable components that can be used to build web pages and applications.

• They help in organizing and structuring content in AEM.

• Modules can be created using Adobe Experience Manager's component framework.

• Examples of modules in AEM include header, footer, carousel, and navigation components.

One significant challenge I faced was optimizing website performance for mobile devices.

• Implemented lazy loading for images to improve loading times

• Minified CSS and JavaScript files to reduce file sizes

• Utilized media queries to ensure responsive design across different screen sizes

JCR stands for Java Content Repository, a hierarchical database used in Adobe Experience Manager (AEM) to store content.

• JCR is used in AEM to store content in a hierarchical structure.

• It allows for versioning, access control, and searching of content.

• Nodes and properties are used to represent content in JCR.

• Example: /content/mysite/homepage is a node in JCR representing the homepage of a website.