Design Patterns Quiz

HappyDays is a platform that offers full-optional vacation package management services. To engineer the definition of reservations, HappyDays platform uses a rigorous procedure that includes a finite number of known steps to build a reservation. The platform is therefore flexible and easily allows HappyDays managers to add new booking categories (if new hotels or products/services are added to the platform the corresponding reservation can be realized).

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer

HappyDays is a platform that offers full-optional vacation package management services. In HappyDays, customer loyalty is rewarded through appropriate discounts that depend on the customer's behavior over time. In this way, a basic customer can be rewarded with special bonuses that decorate his or her functionality that builds a reservation with dedicated discounts. This way, the functionality that creates the reservations can apply specific discounts based on the customer category, which are base/silver/gold and platinum.

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer

Each generic vehicle contains a collection of textual descriptors, which are added to a base vehicle to specify its characteristics (e.g., manufacturer, model, etc.) by an additive mechanism.

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer

Operators direct the creation of activity instances and select which type of activity to build. Activities are always built by providing an identifier, a date, and the start and end time of the activity.

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer

Each statistical tab is updated in real time by the inverters, which notify a tab of the most recent data that are of interest to it. Each tab, therefore, listens for only those updates it uses to compute statistics.

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer

In order to make the analysis of children's letters flexible and extendable, a sequence of steps is used, allowing easy addition of new steps as new toys are released. Each step identifies a specific gift category through a handler implementing suitable artificial intelligence. Each handler processes the letter and is associated with a particular gift class. At the start of the analysis, the system allocates a gift package, and each handler adds identified items to it.

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer

Since a package is created, each team member assigned to the package in fact observes the removal event from the queue.

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer

The digital twin is a collection of physical entities paired with their digital counterparts, and it is flexible enough to allow new entities to be added automatically. The process involves three activities: creating the digital copy, and building the data and behavioral models. Since new physical categories can be introduced, multiple constructors are involved in the creation of digital copies.

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer

The user can play through dashboards that display views like the city map or welfare and financial statistics. These dashboards are updated through notifications following changes in the city. Each user action triggers a notification, informing the control to apply the corresponding change to the city.

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer

A burger is composed of different foods from a selected list accredited by the chef. The customer can also decorate each classic burger with additional ingredients, such as flavourings, sauces, or specific foods.

• Abstract Factory

• Builder

• Decorator

• Chain of Responsibility

• Observer