Interview Questions: Part-3

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1. On Visualforce email template, I want to display only date from CreatedDate field (it's a Date time field).
Answer:

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<messaging:emailTemplate subject="ACTION REQUIRED!" recipientType="User" relatedToType="Interaction__c">
    <messaging:HtmlEmailBody>
        <p>{!relatedTo.Code_Label__c} has been submitted on
            <apex:outputText value=" {0,date,dd-MM-yyyy}">
                <apex:param value="{!relatedTo.createddate}" />
            </apex:outputText> is still pending approval.</p>
    </messaging:HtmlEmailBody>
</messaging:emailTemplate>
Below 2 lines are doing the magic 
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<apex:outputText value=" {0,date,dd-MM-yyyy}">
<apex:param value="{!relatedTo.createddate}" />

2. I want to test 100 email templates then which email-Id you will use? 
Answer: While testing email templates, we don't need to use our original emails. We can use disposable email services. Try this it is very interesting.
1. yopmail 
2. mailinator
Advantages are:
  • No registration
  •  Auto-generated inbox
  •  No Password
  • Messages are kept for 8 days.
3. How to initialize a map and give an example where you have used?
Answer: There are times where we need to initialize the Map (at the time of Map variable creation).
Assume, I have an object called "LocationUnit" which has a total of 600 records. This object contains 3 categories of data, let's say "District", "State" and "city". These categories are identified with a TEXT(will store Alphanumeric value)  field which contains 10 characters.
         Here,
                  District is identified like this:
                  7th + 8th characters should be greater than zero.
                  9th character =0
                  10th character =0
District example: XYZ4567800
Now, my requirement is to fetch all the "District" (LocationUnit) record Ids and pass it to another SOQL query to fetch other object records.
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//Below Map is initialized because if we retrieve a specific character from the text field it will give us ASCII value so to get the decimal number I created this Map.
Map<Integer,Integer> aciiMap = new Map<Integer,Integer>{48=>0,49=>1,50=>2,51=>3,52=>4,53=>5,54=>6,55=>7,56=>8,57=>9};
String LocationUnitNumber;
set<Id> locationIds = new set<Id>();
for(OrgUnit__c ou: [Select Id,LocationUnitNumber__c from LocationUnit__c])
{
 orgUnitNumber = ou.LocationUnitNumber__c ;
 if(!String.isEmpty(LocationUnitNumber) && LocationUnitNumber.length()==10
    (aciiMap.get(LocationUnitNumber.charAt(6)) + aciiMap.get(LocationUnitNumber.charAt(7)))>0 &&
    aciiMap.get(LocationUnitNumber.charAt(8))==0 && aciiMap.get(LocationUnitNumber.charAt(9))==0)
 {
  locationIds.add(ou.Id);
 }
}
4. When you will think about designing a wrapper class can you give me one example?
Answer: Assume, I have a Junction object named as "LocationBasedAmount" below is the sample data of this Object.
LocationId AmountId
Loc1 Am1
Loc1 Am1
Loc1 Am2
Loc2 Am1
Loc2 Am1
Loc3 Am3
Now, I want to collect data like this from the above data :
Loc1 - Am1
Loc1 - Am2
Loc2 - Am1
Loc3 - Am3
To achieve this I have 2 options
Option 1:  we can use Map.

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Map<Id,set<Id>> locMap = new Map<Id,set<Id>> ();
for(LocationBasedAmount__c ba : [Select AmountId__c,LocationId__c from LocationBasedAmount__c])
 {
  if(!locMap.containsKey(ba.LocationId__c))
  {
   locMap.put(ba.LocationId__c ,new set<Id>{ba.AmountId__c});               
  }
  else if(locMap.containsKey(ba.LocationId__c) && 
    !locMap.get(ba.LocationId__c).contains(ba.AmountId__c))
  {
   locMap.get(ba.LocationId__c).add(ba.AmountId__c);
  }            
 }
Option 2: we can collect using the wrapper class 
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Class MainClass
{
 List<WrapperClass> LocAmountIdsList = new List<BudWrapper>();
 for(LocationBasedAmount__c ba : [Select AmountId__c,LocationId__c from LocationBasedAmount__c])
        {
            if(!locMap.containsKey(ba.LocationId__c))
            {
                locMap.put(ba.LocationId__c ,new set<Id>{ba.AmountId__c});
                WrapperClass bw = new WrapperClass(ba.AmountId__c,ba.LocationId__c);
                LocAmountIdsList.add(bw);
            }
            else if(locMap.containsKey(ba.LocationId__c) && 
                    !locMap.get(ba.LocationId__c).contains(ba.AmountId__c))
            {
                locMap.get(ba.LocationId__c).add(ba.AmountId__c); 
                WrapperClass bw = new WrapperClass(ba.AmountId__c,ba.LocationId__c);
                LocAmountIdsList.add(bw);
            }            
        }
 class WrapperClass
 {
  public Id AmountID;
  public Id LocationId;
    
  public WrapperClass(Id AmountID,Id LocationId)
  {
   this.AmountID = AmountID;
   this.LocationId = LocationId;
  }    
 }
}

5. Examples for Validation rules, Workflows, Process builder?
 Answer : 
Validation rules: Link 1
Workflows: Link 1, Link 2
Process builder: Link 1, Link 2, Link 3, Link 4, Link 5

tHiNk gooD and dO thE bEsT.........MANJU NATH 🌝
Location: Bengaluru, Karnataka, India

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