Chained Queueable Job Transaction Limits

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If we call one Queueable class from another Queueable Class then we call that as chaining. For each Queueable class, Salesforce will reset the Governor limits. I tried to prove this using below code snippet  :

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public class QueueableExample1 implements Queueable
{
    public void execute(QueueableContext context) 
    {
        System.debug('-IN--QueueableExample1---Before limits---- '+Limits.getLimitQueries());    
        System.debug('-IN--QueueableExample1---Before limits---- '+Limits.getQueries());  
        
        List<Account> accList = [Select Id,Name from Account];
        System.debug('-IN--QueueableExample1---After limits---- '+Limits.getLimitQueries());    
        System.debug('-IN--QueueableExample1---After limits---- '+Limits.getQueries()); 
        
        System.enqueueJob(new QueueableExample2());
    }
}


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public class QueueableExample2 implements Queueable
{
    public void execute(QueueableContext context) 
    {
        System.debug('-IN--QueueableExample2---Before limits---- '+Limits.getLimitQueries());    
        System.debug('-IN--QueueableExample2---Before limits---- '+Limits.getQueries());  
        
        List<Account> accList = [Select Id,Name from Account];
        System.debug('-IN--QueueableExample2---After limits---- '+Limits.getLimitQueries());    
        System.debug('-IN--QueueableExample2---After limits---- '+Limits.getQueries()); 
        
    }
}
To initiate the above class, Open "execute anonymous window" & execute the below code snippet :
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System.enqueueJob(new QueueableExample1());

Here is the output :
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-IN--QueueableExample1---Before limits---- 200
-IN--QueueableExample1---Before limits---- 0
-IN--QueueableExample1---After limits---- 200
-IN--QueueableExample1---After limits---- 1

-IN--QueueableExample2---Before limits---- 200
-IN--QueueableExample2---Before limits---- 0
-IN--QueueableExample2---After limits---- 200
-IN--QueueableExample2---After limits---- 1

Benefits/Points to be noted about Queueable Jobs:
1. The class execution will start from left to right. So, the leftmost class will be called(/executed) first and so on.
2. For each Queueable class execution, a separate debug log will be created.
3. Only after completion of the first Queueable class then only next class will enter into Queue. The below diagrams depicts the same :

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

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