Salesforce Scenario based Interview Questions

• Apex
• LWC
• Admin

Please click on the scenario to see the solution

Scenario#1 : On Apex Trigger -

Create a Parent Object with name 'Parent' and a Child Object with name 'Child'

Create a Picklist field with name 'Parent Values' in Parent Object with Values '1,2,3,4'

Create a Picklist field with name 'Child Values' in Child Object '1a,1b,1c,2a,2b,2c,Others'

Trigger code should do the below tasks -

1. If parent object picklist is set to 1 then in Child set picklist value back to null and they can select only 1a,1b,1c in child, for remaining throw error
2. If parent object picklist is set to 2 then in Child set picklist value back to null and they can select only can select only 2a,2b,2c for remaining throw error
3. If parent object picklist is set to 3 then in Child set picklist value back to null and they can select only can select only Others for remaining throw error

Solution:-

Please follow the below steps to proceed with this example.

S.No	Component
	Follow the order as mentioned below to create the components
	Configuration
1	Create New App App Label: Sample App Name Sample Note: Enable security for all the profiles.
2	Create New Custom Object Singular Label: Parent Plural Label: Parents Object Name: Parent Standard Field: Field Label Parent No: Data Type: Auto Number Display Format: P-{00000}
3	Create New Custom Field Object: Parent__c Data Type: Picklist Field Label: Parent Values Values: Enter values, with each value separated by a new line. Note: Enter 1, 2, 3, 4 values (each value in a new line) Enable security for all the profiles. Field Name: Parent_Values
4	Create New Custom Object Singular Label: Child Plural Label: Childs Object Name: Child Standard Field: Field Label Child No: Data Type: Auto Number Display Format: C-{00000}
5	Create New Custom Field Object: Child__c Data Type: Lookup(Parent__c) Field Label: Parent Field Name: Parent Note: Enable security for all the profiles.
6	Create New Custom Field Object: Child__c Data Type: Picklist Field Label: Child Values Values: Enter values, with each value separated by a new line. Note: Enter 1a,1b,1c,2a,2b,2c,Others values (each value in a new line) Enable security for all the profiles. Field Name: Child_Values
7	Create New Custom Tabs Create tabs for Parent and Child objects Note: Enable only for the Sample Application.
	Customization
1	Create New Apex Trigger Object: Parent__c Name: ParentTrigger Note: Please see the trigger logic below under: ***ParentTrigger***
2	Create New Apex Trigger Object: Parent__c Name: ChildTrigger Note: Please see the trigger logic below under: ***ChildTrigger***

***ParentTrigger***

     trigger ParentTrigger on Parent__c (after insert, after update) {    
      List childUpdLst = new List();
      for(Parent__c prnt : [select id,Parent_Values__c, (select Child_Values__c from Childs__r) from Parent__c where id in: trigger.newMap.keyset()]) {
       if(prnt.Parent_Values__c == '1' || prnt.Parent_Values__c == '2' || prnt.Parent_Values__c == '3') {
        for(Child__c child : prnt.Childs__r) {
         child.Child_Values__c = '';
         childUpdLst.add(child);
        }
       }
      }
      if(childUpdLst.size() > 0) {
       TriggerUtility.bypassChildVald = true;
       update childUpdLst;
      }
     }
    

***ChildTrigger***

     trigger ChildTrigger on child__c (before insert, before update) {    
      Set parentIds = new Set();
      for(Child__c child : trigger.new) {
       parentIds.add(child.Parent__c);
      }
      
      Map parentMap = new Map(
       [select Parent_Values__c from Parent__c where id in: parentIds]
      );
      
      for(Child__c child : trigger.new) {
       if(parentMap.get(child.Parent__c).Parent_Values__c == '1' && child.Child_Values__c != '1a' && 
       child.Child_Values__c != '1b' && child.Child_Values__c != '1c' && !TriggerUtility.bypassChildVald)
        child.addError('You can select only 1a or 1b or 1c.');
       else if(parentMap.get(child.Parent__c).Parent_Values__c == '2' && child.Child_Values__c != '2a' && 
       child.Child_Values__c != '2b' && child.Child_Values__c != '2c' && !TriggerUtility.bypassChildVald)
        child.addError('You can select only 2a or 2b or 2c.');
       else if(parentMap.get(child.Parent__c).Parent_Values__c == '3' && child.Child_Values__c != 'Others' 
       && !TriggerUtility.bypassChildVald)
        child.addError('You can select only Others.');
      }
     }
    

LWC

SFDC Configuration