Link url fix and examples have been added on 4.1

Author: cyildirim

4. Working with Databases in Magento/1. Demonstrate ability to use data-related classes.md

@@ -106,16 +106,18 @@ public function getDataModel()
 
 Based on interface, calls all SETTERS with given data to fill data object
 
-[Api\DataObjectHelper::populateWithArray](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Api/DataObjectHelper.php#L80)
+[Api\DataObjectHelper::populateWithArray](https://github.com/magento/magento2/blob/2.3/lib/internal/Magento/Framework/Api/DataObjectHelper.php#L80)
 - calls data object SETTERS `set*`, `setIs*` with given raw data
 - handles `custom_attributes` - data object.setCustomAttribute
 
 
+Example: [Magento\Customer\Controller\Account\Edit::execute](https://github.com/magento/magento2/blob/2.3/app/code/Magento/Customer/Controller/Account/Edit.php#L78)
+
 ## buildOutputDataArray
 
 Based on given interface, calls all GETTERS to make resulting data array.
 
-[Reflection\DataObjectProcessor::buildOutputDataArray](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Reflection/DataObjectProcessor.php#L72):
+[Reflection\DataObjectProcessor::buildOutputDataArray](https://github.com/magento/magento2/blob/2.3/lib/internal/Magento/Framework/Reflection/DataObjectProcessor.php#L81):
 - \Magento\Framework\Reflection\MethodsMap::getMethodsMap - method name and getter return types
 - filter only getters: is..., has..., get...
 - get data using interface getter, e.g. $object->getSku() - based on Interface definition
@@ -125,3 +127,5 @@ Based on given interface, calls all GETTERS to make resulting data array.
 - process return object: build return value objects with their return type annotation
 - process return array: cast each element to type, e.g. int[] => (int) each value
 - cast element to type
+
+Example: [Magento\Customer\Model\Address::updateData](https://github.com/magento/magento2/blob/2.3/app/code/Magento/Customer/Model/Address.php#L145)