A developer has javascript code that needs to be called by controller functions in multiple components by extending a new abstract component. Which resource in the abstract component bundle allows the developer to achieve this

A developer must write an Apex method that will be called from a Lightning component. The method may delete an Account stored in the accountRec variable.
Which method should a developer use to ensure only users that should be able to delete Accounts can successfully perform deletions?

The following Apex method is part of the ContactService class that is called from a trigger: public static void setBusinessUnitToEMEA(Contact thisContact){ thisContact.Business_Unit__c = "EMEA" ; update thisContact; } How should the developer modify the code to ensure best practice are met?

As a part of class implementation a developer must execute a SOQL query against a large data ser based on the contact object. The method implementation is as follows.

Which two methods are best practice to implement heap size control for the above code? (Choose 2 Answers)

In the code below, which type does String inherit from? String s = 'Hello World';