Bài kiểm tra HFOOAD Chapter 5

The current search code is implemented for which classes?

• Instrument

• Mandolin

• Abstract class

• Guitar

Answer explanation

The current search code is implemented for the 'Guitar' class, as indicated in the correct answer choice. This class is the one being searched within the code.

What design pattern is mentioned in the text?

• Singletons

• Strategy

• Iterator

• Abstract Factory

Answer explanation

The correct design pattern mentioned in the text is Strategy. It is the pattern that allows a family of algorithms to be defined, encapsulated, and made interchangeable.

What is the purpose of the matches method in the text?

• To add new properties

• To compare two instrument specifications

• To handle exceptions

• To generate random numbers

Answer explanation

The purpose of the matches method in the text is to compare two instrument specifications.

What is the main focus of the Strategy design pattern?

• Behavioral delegation

• Inheritance

• Polymorphism

• Encapsulation

Answer explanation

The main focus of the Strategy design pattern is Behavioral delegation, where behavior is delegated to different classes to achieve flexibility and reusability.

What is the key principle mentioned for good software design?

• High cohesion

• Static typing

• Tight coupling

• Code duplication

Answer explanation

The key principle mentioned for good software design is high cohesion, which refers to the degree to which the elements inside a module belong together.

What is the purpose of using use cases in requirements analysis?

• To slow down the process

• To ensure completeness

• To confuse developers

• To hide information

Answer explanation

Use cases are used in requirements analysis to ensure completeness by detailing all possible scenarios and interactions, helping to capture all necessary functionalities.

What is the recommended approach when facing a design that lacks flexibility?

• Fix it

• Ignore it

• Blame others

• Accept it as is

Answer explanation

The recommended approach when facing a design that lacks flexibility is to fix it, as it allows for improvements and adjustments to be made for better usability and adaptability.

What is the main benefit of applying the Ease of Change test?

• To identify design flaws

• To decrease flexibility

• To increase complexity

• To discourage improvements

Answer explanation

The main benefit of applying the Ease of Change test is to identify design flaws, not to decrease flexibility, increase complexity, or discourage improvements.

What is the purpose of the InstrumentSpec class in the text?

• To display error messages

• To define common behaviors

• To store instrument prices

• To handle user input

Answer explanation

The purpose of the InstrumentSpec class is to define common behaviors, such as characteristics and properties of musical instruments.

What is the recommended action when requirements change over time?

• Blame the stakeholders

• Ignore the changes

• Adapt and update the design

• Revert to an older version

Answer explanation

When requirements change over time, the recommended action is to adapt and update the design to align with the new requirements, ensuring the project stays on track and meets the updated needs.