Tag: architecture

A Visitor Design pattern is

Need to create a class, which will return the same instance whenever requested

Notify changes happened in one class to all it's dependent class

You want to encapsulate data access and manipulation in a separate layer.

What pattern does this code have implemented

Design a shopping web application, which on a query will return arbitarily more number of records. But the requirement is to display only 10 records maximum per page. Also, you are not supposed to execute the same query to fetch the next result set. Also, user should be able to navigate to all the search results back & forth. So, what type of design pattern will be used?

Implementation details of creating different object should not be exposed out. What kind of class will help to achive this?

You are required to write a class which should behave in the similar way as another class in the system. It should have all the methods and properties as of the other class and should have ability to modify the operations of the methods defined in the main class

You are not allowed to expose the internal representations of your complex collection / array data type. How do you to fetch elements one after another?

You need to add few data to the request object once the request is submited to the server.