Hi Vishwa,

Hi , as a best practise we should always write one trigger for one object..you can create different different methods for events and use them in on trigger only if you need...I will share an example which will explain you how to use..

Example: In this example you can merge everything in one trigger only...

Create a Trigger for all events:

Trigger testTrigger on Account
{
       //create a handler class for this trigger
       AccountTriggerHandler objHandler = new AccountTriggerHandler ();

      if(trigger.isAfter && trigger.isUpdate)
      {
           objHandler .onAfterUpdate(trigger.new, trigger.old);
       }
}



create a class which will be a handler class for this

public class AccountTriggerHandler
{
      public AccountTriggerHandler ()
      {
           //main constructor
        }

       //define a method which will call from trigger
      public void onAfterUpdate(list<Account> lstOldAcc, list<Account> lstnewAcc)
     {
          //from this method you call all your methods which should execute after update

           updateCurency(lstOldAcc, lstnewAcc);
           updatePhone(lstOldAcc, lstnewAcc);
      }

   //here you can define those methods
   public void updateCurency(list<Account> lstOldAcc, list<Account> lstnewAcc)
   {
       //write your logic
    }

    public void updatePhone(list<Account> lstOldAcc, list<Account> lstnewAcc)
   {
       //write your logic
    }
}


like I define above, you can define many methods and call them from same event like for update I showed

Please mark this as best answer if it solves your doubt..let me know if you need anything else