Salesforce Interview Questions – Part 2
Salesforce interview Question asked in 2014 and 2015 in different companies.
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31. What are the different types of controllers?
We have three types of controllers. They are
- Standard controller.
- Custom controller.
- Controller extension.
Controller definition: A Visual force controller us a set of instructions that specify what happens when a user interacts with the components specified in associated Visualforce markup, such as when a user clicks a button or a link.
- Controllers also provide access to the data that should be displayed in a page, and can modify component behavior.
Standard Controller: A standard controller consists of the same functionality and logic that is used for a standard Salesforce page. For example, if we use the standard accounts controller, clicking a Save button in a Visualforce page result in the same behavior as clicking Save on a standard Account edit page.
Custom Controller: A custom controller is a class written in Apex that implements all of a page logic.
If we use custom controller, we can define new navigation elements or behaviors, but we must also reimplement any functionality that was already provided in a standard controller.
Controller Extensions: A controller extensions is a class written in Apex that adds to or overrides behavior in a standard or custom controller. Extensions allow us to leverage that functionality of another controller while adding our own custom logic.
32. What is Custom controller?
Custom Controller: A custom controller is a class written in Apex that implements all of a page logic.
- If we use custom controller, we can define new navigation elements or behaviors, but we must also reimplement any functionality that was already provided in a standard controller.
33. What is the difference between the Workflow and Approval Process?
Workflow rules and Approval Processes can be used together.
| Workflow Rules | Approval Processes |
| Are Triggered upon Save | Are triggered only when a user clicks “Submit for Approval” button. |
| Consists of one set of criteria and actions | Consists of multiple steps |
| Have an entry criteru8a, step criteria and step actions. | |
| Have Initial submission action, rejection and approval actions and action for each step | |
| Can be modified or deleted. | Some attributes can’t be modified processes must be deactivated before they can be deleted. |
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