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Salesforce Interview Trigger Questions

1. Write a trigger on Account, for update related contacts if Contact's Company Name field is blank, populate it with Account's Company Name field.

Limitations: Only 1 loop allowed.

Solution:

trigger on Account (After Update) {

    Map<Id, Account> accountMap = Trigger.newMap;

    List<Contact> contactList = [Select Id, Company_Name__c From Contact Where AccountId             in:accountMap.keys()];

    List<Contact> contactListForUpdate = List<Contact>();

    for(Contact contact : contactList) {

if(String.isBlank(contact.Company_Name__c)) {

    contact.Company_Name__c = accountMap.get(contact.AccountId).Company_Name__c;

    contactListForUpdate.add(contact);

}

}

update contactListForUpdate;

}

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