apex trigger interview questions scenario based || Part 2

In this video i am sharing :
apex trigger interview questions scenario based
salesforce coding interview questions
apex trigger scenarios
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[@tarseelkazmi6682]

Great explanation. Can you please explain the difference between put and add method as I am very much confused when to use which.

[@salesforcein5minutes]

Thanks a lot 😃
1) When you are using maps thats when you use put
For example
map mymap = new Map() ;
mymap.put('A', ' subscribe ') ;
2) when you are using lists / sets we use add function instead
List mylist = new List () ;
mylist.add('sf in 5 minutes') ;

[@teluguraju981]

Excellent 👌, after completed the code please test and show the result the functionality in Salesforce UI

[@salesforcein5minutes]

Thanks,
It works i have tried it, note pad shows the whole view hence i coded there

[@Arunaish-99]

Hii Bro!! Next time can you write the handler class while writting the triggers

[@salesforcein5minutes]

Suree 😀

[@tarseelkazmi6682]

Here.

[@salesforcein5minutes]

Thats scenario where one parent having 2 childs and if one of child is updated, update the another child of same parent

[@salesforcein5minutes]

Again thanks a lot man i have reuploaded the video for part 3 🙏🙏 sorry for not reviewing properly

[@GAI1408]

Hi I am struggling to understand this Logic because how it will prevent automatically to unchecked other contacts
Can you please write a explanation of this code in chat I am little confused

[@namanshetty2781]

Suppose we have 10 contacts associated to an account and there's 2 contacts that are active. Now if i try to update 5 contacts that are inactive to activate, then all these 5 contacts will be active and the 2 existing contacts which were active will be inactive. But the requirement is only to have 1 active contact for an account. How can we do this sir?

[@salesforcein5minutes]

You have to further write a before trigger to validate that any account must only have one related contact as active, if some one tries to make multiple active then throw error

[@namanshetty2781]

@@salesforcein5minutes makes sense thanks