diff --git a/app/code/Magento/Catalog/Block/Adminhtml/Category/Tree.php b/app/code/Magento/Catalog/Block/Adminhtml/Category/Tree.php
index e9f71c8a0d485..e3bfee0b862e0 100644
--- a/app/code/Magento/Catalog/Block/Adminhtml/Category/Tree.php
+++ b/app/code/Magento/Catalog/Block/Adminhtml/Category/Tree.php
@@ -325,7 +325,7 @@ public function getBreadcrumbsJavascript($path, $javascriptVarName)
      *
      * @param Node|array $node
      * @param int $level
-     * @return string
+     * @return array
      * @SuppressWarnings(PHPMD.CyclomaticComplexity)
      * @SuppressWarnings(PHPMD.NPathComplexity)
      */
diff --git a/app/code/Magento/Catalog/Block/Adminhtml/Category/Widget/Chooser.php b/app/code/Magento/Catalog/Block/Adminhtml/Category/Widget/Chooser.php
index 6aa2f04c9c4e8..5decc60d72c5a 100644
--- a/app/code/Magento/Catalog/Block/Adminhtml/Category/Widget/Chooser.php
+++ b/app/code/Magento/Catalog/Block/Adminhtml/Category/Widget/Chooser.php
@@ -144,7 +144,7 @@ function (node, e) {
      *
      * @param \Magento\Framework\Data\Tree\Node|array $node
      * @param int $level
-     * @return string
+     * @return array
      */
     protected function _getNodeJson($node, $level = 0)
     {
diff --git a/app/code/Magento/Catalog/Block/Adminhtml/Form/Renderer/Fieldset/Element.php b/app/code/Magento/Catalog/Block/Adminhtml/Form/Renderer/Fieldset/Element.php
index 10214fc1d16fd..ad6df27b89334 100644
--- a/app/code/Magento/Catalog/Block/Adminhtml/Form/Renderer/Fieldset/Element.php
+++ b/app/code/Magento/Catalog/Block/Adminhtml/Form/Renderer/Fieldset/Element.php
@@ -21,7 +21,7 @@ class Element extends \Magento\Backend\Block\Widget\Form\Renderer\Fieldset\Eleme
     /**
      * Retrieve data object related with form
      *
-     * @return \Magento\Catalog\Model\Product || \Magento\Catalog\Model\Category
+     * @return \Magento\Catalog\Model\Product|\Magento\Catalog\Model\Category
      */
     public function getDataObject()
     {
diff --git a/app/code/Magento/Catalog/Block/Adminhtml/Product/Attribute/Grid.php b/app/code/Magento/Catalog/Block/Adminhtml/Product/Attribute/Grid.php
index ab5026b1e69b9..66e04ef03f771 100644
--- a/app/code/Magento/Catalog/Block/Adminhtml/Product/Attribute/Grid.php
+++ b/app/code/Magento/Catalog/Block/Adminhtml/Product/Attribute/Grid.php
@@ -101,8 +101,7 @@ protected function _prepareColumns()
                 'type' => 'options',
                 'options' => ['1' => __('Yes'), '0' => __('No')],
                 'align' => 'center'
-            ],
-            'is_user_defined'
+            ]
         );
 
         $this->_eventManager->dispatch('product_attribute_grid_build', ['grid' => $this]);
diff --git a/app/code/Magento/Catalog/Block/Adminhtml/Product/Edit/Tab/Attributes/Search.php b/app/code/Magento/Catalog/Block/Adminhtml/Product/Edit/Tab/Attributes/Search.php
index d5f66231f1d82..e1b97f996c769 100644
--- a/app/code/Magento/Catalog/Block/Adminhtml/Product/Edit/Tab/Attributes/Search.php
+++ b/app/code/Magento/Catalog/Block/Adminhtml/Product/Edit/Tab/Attributes/Search.php
@@ -81,7 +81,7 @@ public function getSelectorOptions()
      *
      * @param string $labelPart
      * @param int $templateId
-     * @return \Magento\Catalog\Model\ResourceModel\Product\Attribute\Collection
+     * @return array
      */
     public function getSuggestedAttributes($labelPart, $templateId = null)
     {
diff --git a/app/code/Magento/Catalog/Block/Adminhtml/Rss/Grid/Link.php b/app/code/Magento/Catalog/Block/Adminhtml/Rss/Grid/Link.php
index dbeff93683bc0..9d13d89d54b80 100644
--- a/app/code/Magento/Catalog/Block/Adminhtml/Rss/Grid/Link.php
+++ b/app/code/Magento/Catalog/Block/Adminhtml/Rss/Grid/Link.php
@@ -69,7 +69,7 @@ public function isRssAllowed()
     }
 
     /**
-     * @return string
+     * @return array
      */
     protected function getLinkParams()
     {
diff --git a/app/code/Magento/Catalog/Block/Category/Rss/Link.php b/app/code/Magento/Catalog/Block/Category/Rss/Link.php
index bcb48b9cfa0b6..02728f467e805 100644
--- a/app/code/Magento/Catalog/Block/Category/Rss/Link.php
+++ b/app/code/Magento/Catalog/Block/Category/Rss/Link.php
@@ -60,7 +60,7 @@ public function getLabel()
     }
 
     /**
-     * @return string
+     * @return array
      */
     protected function getLinkParams()
     {
diff --git a/app/code/Magento/Catalog/Block/Product/AbstractProduct.php b/app/code/Magento/Catalog/Block/Product/AbstractProduct.php
index 8060afbec701f..78430e901966d 100644
--- a/app/code/Magento/Catalog/Block/Product/AbstractProduct.php
+++ b/app/code/Magento/Catalog/Block/Product/AbstractProduct.php
@@ -186,7 +186,7 @@ public function getAddToCompareUrl()
      * Gets minimal sales quantity
      *
      * @param \Magento\Catalog\Model\Product $product
-     * @return int|null
+     * @return float|null
      */
     public function getMinimalQty($product)
     {
diff --git a/app/code/Magento/Catalog/Block/Product/View/Options/AbstractOptions.php b/app/code/Magento/Catalog/Block/Product/View/Options/AbstractOptions.php
index 53d2985c65e22..1f2b596a8ae67 100644
--- a/app/code/Magento/Catalog/Block/Product/View/Options/AbstractOptions.php
+++ b/app/code/Magento/Catalog/Block/Product/View/Options/AbstractOptions.php
@@ -174,7 +174,7 @@ public function getPrice($price, $includingTax = null)
      * Returns price converted to current currency rate
      *
      * @param float $price
-     * @return float
+     * @return float|string
      */
     public function getCurrencyPrice($price)
     {
diff --git a/app/code/Magento/Catalog/Block/Rss/Product/Special.php b/app/code/Magento/Catalog/Block/Rss/Product/Special.php
index c61bee4417cbc..a9107f14cc5e4 100644
--- a/app/code/Magento/Catalog/Block/Rss/Product/Special.php
+++ b/app/code/Magento/Catalog/Block/Rss/Product/Special.php
@@ -107,7 +107,7 @@ protected function _construct()
     }
 
     /**
-     * @return string
+     * @return array
      */
     public function getRssData()
     {