Salesforce Random Interview Questions Part-3

 Random Salesforce Interview Questions

1:- What are junction objects in salesforce?
Ans:- Junction objects are objects having TWO master-detail relationships. For Example:- A Candidate can apply for different positions and a position can have many candidates in job posting application.

2:- What is a platform event and why we use it?
Ans:- Platform event are events those shows changes. Publish and subscribed model works here. Any changes that happened in salesforce will be reflected in another system in real-time. EventBus class is in salesforce that contains methods to publish events (eventbus.publish()).

3:- What is Queueable Apex?
Ans:- Basic use of Queueable apex to control asynchronous apex process. Using this we can add jobs to the queue.System.enqueueJob that returns ID Using this ID we can monitor jobs.
// Class 
public class FirsRun implements Queueable{
    public void execute (QueueableContext context){
                //Your Method or Code
}
}
 //Chain Job like this
FirsRun F1 =new FirsRun ();
ID ProcessID = System.enqueueJob(F1);

4:- What is test.starttest() and test.stoptest()?
Ans:- Code inside test.startest() and test.stoptest() have new set of governor limits. 

5:- How to call apex method from lightning?
Ans:- let action = cmp.get('C.methodaname');
            action.setparam({
                paramater here
            });

            action.setcallbanck({ function (res)
                let result = res.getreturnvalue();
            });
            $A.enqueueAction(action);

6:- What is $A.enqueueAction()?
Ans:- $A.enqueueAction(action) adds the server-side controller action to the queue of actions to be executed. All actions that are enqueued will run at the end of the event loop.

7:- Difference between remote-site setting and named credentials?
Ans:- Remote-site setting:- This whitelist the URL of the external system. it is security checked by the force.com platform.

Named Credentials: A named credential specifies the URL of a callout endpoint and its required authentication parameters in one definition. Salesforce manages all authentication for Apex callouts that specify a named credential as the callout endpoint so that your code doesn’t have to. You can also skip remote site settings, which are otherwise required for callouts to external sites, for the site defined in the named credential.

8:- Custom setting and custom metadata type?
Ans:- Custom Setting:- Custom settings are similar to custom objects and enable application developers to create custom sets of data, as well as create and associate custom data for an organization, profile, or specific user. New custom setting records can be created using apex.

Custom Metadata:- Custom metadata is customizable, deployable, packageable, and upgradeable application metadata.

9:- What are phases in lightning?
Ans:- There are two types of phases.
            1. Bubble Phase. (the event is first captured and handled by the innermost element and then propagated to outer elements.)

            2. Capture phase.(Event starts from the parent element and then to its child element.)

10:- Values providers in lightning?
Ans:- C and V are value providers.
            C - controller
            V- view
C.abc  mean value return by the controller.
V.xyz mean value hold by attribute XYZ.

Salesforce Random Interview Questions Part-2