Question

Identify the most applicable design pattern for the given scenario.

Assume you are writing a program to respond to many different types of web requests. You determine that there are 5 steps for handling the request which need to be done in order:

1. Set up server memory
2. Process the URL
3. Handle web form parameters
4. Generate the content of the web page
5. Send the page back to the user.

You quickly realize that Steps 1, 2, and 5 are generic and happen the same way for every request, but Steps 3 and 4 will be different, depending on the request that is made.

a.- Observer Pattern

b.- Template Pattern

c.- Strategy Pattern

d.- Factory Pattern

Identify the most applicable design pattern for the given scenario.

You are writing a program that will be using multiple libraries created by others to interact with different databases. Each library does similar behavior but each has its own unique software interface. You want to create a common interface for your program without having to change the libraries you received from other people.

a.- Model View Controller Pattern

b.- Strategy Pattern

c.- Singleton Pattern

d.- Adapter Pattern

Identify the most applicable design pattern for the given scenario.

You are working on an application to track daily exercise and eating, and then compute calories burned, etc.

There will be a fairly involved UI component with charts and buttons to click on to enter data, but also a fairly complex set of classes that handle the interaction among all the classes for exercise and nutrition.

You decide that you want to keep UI concerns separate from the exercise and nutrition rules and complexities.

a.- Strategy Pattern

b.- Model View Controller Pattern

c.- Template Pattern

d.- Iterator Pattern

Identify the most applicable design pattern for the given scenario.

In your application, you have users preferences that are accessed and updated from different classes at different points throughout the program.

You decide to create a class to manage the user preferences, but would prefer not to have to pass around an instance of it to all the different classes that will need access to it.

a.- Model View Controller Pattern

b.- Observer Pattern

c.- Adapter Pattern

d.- Singleton Pattern

Answer 1

Answer)

1) D - Factory Pattern

This is the kind of pattern which states that it has a defined interface or that of an abstract class meant for creating the object while let the subclass would decide as to which class would be instantiates and is responsible for an instance creation.

2) D - Adapter Pattern

When software engineering is considered then this is the software design pattern which helps in allowing the interface for a specific existing class being used with that of the other interface.

3) B - Model View Controller Pattern

The MVC is a kind of software design patern mostly being used for developing the user interface which would divide a specific related program logic as some of the interconnected element which would have a separate internal representative for a specific information from many information means to accept from and present it to that of the users.

4) B - Observer Pattern

There is this observe pattern which could be used as a software design pattern where the object referred as subject would maintain the list of dependents referred as observers would notify those in an automatic manner, by calling one of its methods.

Please comment if you need any other inputs.
Share a like if you find the answer helpful. This would help us learn and share our learning better.
Thank you.