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2. You are creating a game that has the character go through a maze. Some walls are visible, but some are invisible. In other words, when the code tries to access some wall's Draw behavior, it will either do something useful or do nothing. Which pattern would be helpful for the drawing scenario?  Options: Proxy, null object, Adapter, Decorator 3. You are developing an application that accesses a storage service for the customer.  In some cases, you want to check the customer's payment status before actually accessing the storage.  What design pattern would be best at providing this kind of control? Options: Proxy, null object, Adapter, Decorator

2. You are creating a game that has the character go through a maze. Some walls are visible, but some are invisible. In other words, when the code tries to access some wall's Draw behavior, it will either do something useful or do nothing. Which pattern would be helpful for the drawing scenario?  Options: Proxy, null object, Adapter, Decorator 3. You are developing an application that accesses a storage service for the customer.  In some cases, you want to check the customer's payment status before actually accessing the storage.  What design pattern would be best at providing this kind of control? Options: Proxy, null object, Adapter, Decorator

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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2. You are creating a game that has the character go through a maze. Some walls are visible, but some are invisible. In other words, when the code tries to access some wall's Draw behavior, it will either do something useful or do nothing. Which pattern would be helpful for the drawing scenario? 

Options: Proxy, null object, Adapter, Decorator

3. You are developing an application that accesses a storage service for the customer.  In some cases, you want to check the customer's payment status before actually accessing the storage.  What design pattern would be best at providing this kind of control?

Options: Proxy, null object, Adapter, Decorator

**Question:** You are developing an application that accesses a storage service for the customer. In some cases, you want to check the customer's payment status before actually accessing the storage. What design pattern would be best at providing this kind of control? - ○ Proxy - ○ Decorator - ○ Adapter - ○ Null Object **Explanation:** This question is about selecting the most suitable design pattern for ensuring control over customer interactions with a storage service, specifically by checking payment status before granting access. Each option represents a different design pattern in software engineering: - **Proxy:** This design pattern provides a surrogate or placeholder for another object to control access to it. It is typically used when you want to add an additional layer that manages access, thus making it ideal for the scenario where customer payment status needs to be checked before accessing storage. - **Decorator:** It adds behavior to individual objects without affecting the behavior of other objects from the same class. This is generally used to enhance functionality rather than control access. - **Adapter:** This pattern is used to allow the interface of an existing class to be used as another interface. It is mainly for compatibility purposes, not for access control. - **Null Object:** This pattern uses a non-functional object as a default behavior. It's used to avoid null references by providing a default object but doesn't address access control needs. Based on the description, the **Proxy pattern** would be best suited for this scenario as it helps manage and control access, aligning with the requirement to check payment status before accessing storage.
Transcribed Image Text:**Question:** You are developing an application that accesses a storage service for the customer. In some cases, you want to check the customer's payment status before actually accessing the storage. What design pattern would be best at providing this kind of control? - ○ Proxy - ○ Decorator - ○ Adapter - ○ Null Object **Explanation:** This question is about selecting the most suitable design pattern for ensuring control over customer interactions with a storage service, specifically by checking payment status before granting access. Each option represents a different design pattern in software engineering: - **Proxy:** This design pattern provides a surrogate or placeholder for another object to control access to it. It is typically used when you want to add an additional layer that manages access, thus making it ideal for the scenario where customer payment status needs to be checked before accessing storage. - **Decorator:** It adds behavior to individual objects without affecting the behavior of other objects from the same class. This is generally used to enhance functionality rather than control access. - **Adapter:** This pattern is used to allow the interface of an existing class to be used as another interface. It is mainly for compatibility purposes, not for access control. - **Null Object:** This pattern uses a non-functional object as a default behavior. It's used to avoid null references by providing a default object but doesn't address access control needs. Based on the description, the **Proxy pattern** would be best suited for this scenario as it helps manage and control access, aligning with the requirement to check payment status before accessing storage.
You are creating a game that has the character go through a maze. Some walls are visible, but some are invisible. In other words, when code tries to access some wall's Draw behavior, it will either do something useful, or do nothing. Which pattern would be helpful for the drawing scenario? - ○ Proxy - ○ Null Object - ○ Adapter - ○ Decorator
Transcribed Image Text:You are creating a game that has the character go through a maze. Some walls are visible, but some are invisible. In other words, when code tries to access some wall's Draw behavior, it will either do something useful, or do nothing. Which pattern would be helpful for the drawing scenario? - ○ Proxy - ○ Null Object - ○ Adapter - ○ Decorator
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