Visualforce Interview Questions
Preparing for Visualforce Interview: Common Questions to Expect
Visualforce Interview Questions
Visualforce interview questions typically cover topics such as the basics of Visualforce, including its components like pages, components, controllers, and extensions. Questions can also delve into how Visualforce integrates with Apex, Salesforce's programming language, and how to handle errors and exceptions in Visualforce pages. Interviewers may ask about best practices for designing and optimizing Visualforce pages, as well as customization options and styling. Knowledge of data binding, action functions, and standard controllers are also common areas of questioning, along with security considerations when working with Visualforce. It's important for candidates to have a strong understanding of Visualforce concepts and practical experience to perform well in interviews.
To Download Our Brochure: https://www.justacademy.co/download-brochure-for-free
Message us for more information: +91 9987184296
1 - What is Visualforce in Salesforce?
Visualforce is a framework that allows developers to build custom user interfaces for Salesforce applications. It uses a tag based markup language similar to HTML to create pages that can include data from Salesforce objects.
2) What are the different components of Visualforce?
Visualforce components include standard controllers, custom controllers, controller extensions, Visualforce pages, Visualforce components, and custom tags. Standard controllers allow developers to work with standard objects like Accounts and Contacts, while custom controllers provide custom logic for Visualforce pages.
3) What is an apex:page tag in Visualforce?
The apex:page tag is used to define a Visualforce page in Salesforce. It specifies attributes such as the controller class to use, whether the page should be cached, and the standard styling to apply.
4) What is the difference between controller extensions and custom controllers in Visualforce?
Controller extensions allow developers to extend the functionality of a standard controller or another controller extension. They provide additional logic for a Visualforce page without overriding the standard controller. Custom controllers, on the other hand, completely replace the standard controller's behavior with custom logic.
5) How can you pass parameters from one Visualforce page to another in Salesforce?
Parameters can be passed from one Visualforce page to another using the apex:page tag's parameters attribute. By specifying this attribute and setting values, data can be passed between pages. Another method is to use the URL parameters to pass data.
6) What is the purpose of Visualforce components in Salesforce?
Visualforce components allow developers to break down complex Visualforce pages into smaller reusable pieces. They help in organizing the code, promoting reusability, and enhancing the maintainability of Visualforce applications.
7) How can you display data from Salesforce objects using Visualforce?
Data from Salesforce objects can be displayed in Visualforce pages using standard controllers like <apex:pageBlockTable> and <apex:dataTable>. These components retrieve and display data in a tabular format, making it easy for users to view and interact with the information.
8) How do you handle errors in Visualforce pages?
Errors in Visualforce pages can be handled using the <apex:pageMessages> component to display error messages to users. Custom exception handling can also be implemented in the controller class to capture and manage errors effectively. By using try catch blocks and debug statements, developers can identify and resolve errors efficiently.
9) Can you integrate JavaScript with Visualforce pages?
Yes, developers can integrate JavaScript with Visualforce pages to enhance user interactions and create dynamic content. JavaScript can be embedded directly into Visualforce pages using <apex:includeScript>, allowing for client side scripting capabilities.
10) How can you optimize Visualforce page performance?
Visualforce page performance can be optimized by minimizing the use of server calls, reducing the amount of data retrieved, utilizing caching techniques, and optimizing the page markup. By following best practices such as using lazy loading and pagination, developers can ensure efficient performance of Visualforce pages.
Browse our course links : https://www.justacademy.co/all-courses
To Join our FREE DEMO Session: Click Here
Contact Us for more info:
- Message us on Whatsapp: +91 9987184296
- Email id: info@justacademy.co
Jquery Interview Questions And Answers
Bootstrap Interview Questions Github
Salesforce Interview Questions And Answers
Java Technical Architect Interview Questions
