Magento Interview Questions

13 Comments

• 
  dillep May 22, 2012 at 5:21 pm

  thanks for the questions,
  It would be great if you can provide answers for them…

  Reply
• 
  laeeq June 29, 2012 at 6:20 am

  very useful magento question list! plz also provide answer of them, thanks

  Reply
• 
  Agni July 6, 2012 at 9:57 am

  Yes, answer pls!!
  🙂

  —
  Thanks

  Reply
• 
  Praful September 8, 2012 at 7:42 am

  Thanks for Questions!!!!

  Reply
• 
  fahim February 11, 2013 at 12:58 pm

  Awesome question!!!

  Reply
• 
  Abhilash March 22, 2013 at 8:32 am

  Answer 1 :
  How Magento’s MVC works:
  1. When you enter the URL (something like http://mysite.com/frontname/controller/method/param1/value1/param2/value2), this URL is intercepted by one PHP file called index.php which instantiates Magento application
  2. Magento application instantiates Front Controller object
  3. Further, front controller instantiates Router objects (specified in module’s config.xml, global tag)
  4. Now, Router is responsible to “match” the frontname which is in our URL
  5. If “match” is found, it sees controller name and method name in the URL, which is finally called.
  6. Now depending on what is written in action name (method name), it is executed. If any models are called in it, the controller method will instantiate that model and call the method in it which is requested.
  7. Then the controller action (method) instantiate the Layout object, which calls Block specified for this action (method) name (Each controller action name have block and template file associated with it, which can be found at app/design/frontend or adminhtml/namespace/module/layout/module.xml file, name of layout file (module.xml) can be found in config.xml of that module, in layout updates tag).
  8. Template file (.phtml) now calls the corresponding block for any method request. So, if you write $this->methodName in .phtml file, it will check “methodName” in the block file which is associated in module.xml file.
  9. Block contains PHP logic. It references Models for any data from DB.
  10. If either Block, Template file or Controller need to get/set some data from/to database, they can call Model directly like Mage::getModel(‘modulename/modelname’).

  Reply
• 
  Abhilash March 22, 2013 at 8:32 am

  Answer2:
  ORM stands for Object Relational Mapping. It’s a programming technique used to convert different types of data to Objects and vice versa.
  In Magento, ORM is shown as Model (based on Zend Framework’s Zend_Db_Adapter), which further breaks down to two types of Models.
  – First is the “simple” i.e. Regular Models which is nothing but flat table or our regular table structure.
  – Second Model is EAV (Entity Attribute Value), which is quite complicated and expensive to query.
  All Magento Models interacting with database are inherited from Mage_Core_Model_Abstract class, which is further inherited from Varien_Object.
  Difference between two Models is, Simple Model is inherited from Mage_Core_Model_Resource_Db_Abstract class,
  while EAV is inherited from Mage_Eav_Model_Entity_Abstract.
  For those who don’t know what EAV is, please read my 3rd answer below.
  So, to end up this question,
  when you want to get some data in Magento, you call it like this:
  Mage::getModel(‘module/model’)->load(1);
  where 1 is the primary key id for some Regular/Simple table, while in EAV so many tables are joined to fetch just single row of data.

  Reply
• 
  Abhilash March 22, 2013 at 8:34 am

  Answer3:
  In EAV database model, data are stored in different smaller tables rather than storing in asingle table.product name is stored in catalog_product_entity_varchar tableproduct id is stored in catalog_product_entity_int tableproduct price is stored in catalog_product_entity_decimal tableMagento Use EAV database model for easy upgrade and development as this model givesmore flexibility to play with data and attributes.

  Reply
• 
  Abhilash March 22, 2013 at 8:34 am

  Answer4:
  Mage::getSingletone() always finds for an existing object if not then create that a newobject but Mage::getModel() always creates a new object.

  Reply
• 
  Nitin April 18, 2013 at 2:01 pm

  Please gimme a link where is the rest answer

  I am really thankful of u

  Pls give it soon as I have interview on monday

  Reply
• 
  Bhavesh June 13, 2013 at 12:05 pm

  Hi Kaplesh,
  I have a make website in magento but here, problem is dublication. If any customer see any product and click on add to cart button then automatic create same as dublicate product.

  Please tell me how to sort out this issue….

  Thanks in Advance !

  Bhavesh

  Reply
• 
  Dipen May 6, 2014 at 10:59 am

  Really useful .thanks for such a nice blog

  Reply
• 
  vishal mangukiya November 25, 2014 at 5:06 am

  Hi kalpesh ,
  I am really thanx to you bro!
  this blog is very good and questions as well,
  and keep it up to post like this one.
  thank you in advance.

  Reply