Question 1

A class can implement ________ interfaces shared with other classes.

Accepted Answer

A class in Java can implement multiple interfaces, allowing it to inherit abstract methods from multiple sources.

Question 2

Which of the following is NOTa reason for creating multiple interfaces?

Accepted Answer

Simplicity is not a reason for creating multiple interfaces; rather, it's often a goal of design that might be compromised by adding more interfaces, which can increase complexity.

Question 3

The concept of "white-box reuse" that exposes a subclass to the details of its superclass implementation applies to ________.

Accepted Answer

White-box reuse is a concept associated with inheritance, where a subclass has access to and can use the details of its superclass implementation. This contrasts with black-box reuse, where the internal workings of a class are hidden.

Question 4

The black-box reuse approach ce, where the internal details of a class are not exposed to subclasses, is also called ________.

Accepted Answer

The black-box reuse approach, where the internal details of a class are not exposed to subclasses, is referred to as the composition approach. This method involves using objects of one class as fields of another class, promoting encapsulation and minimizing dependencies between classes.

Question 5

Which of the following languages supports multiple inheritance?

Accepted Answer

C++ supports multiple inheritance, allowing a class to inherit from more than one base class. Java, C, and C# do not support multiple inheritance directly. Java uses interfaces to achieve a similar effect, while C# uses interfaces and can also use a concept called mixins for similar functionality. C is a procedural programming language and does not support inheritance.

Question 6

Building products from replaceable, interchangeable, reusable, and well-tested components has proved to ________.

Accepted Answer

Building products from replaceable, interchangeable, reusable, and well-tested components ensures quality, allows for customization, and reduces costs through economies of scale, making all of the options correct.

Question 7

Building everything from start to finish in one project is called ________ development.

Accepted Answer

Vertical development refers to the process of building a project from start to finish in a sequential manner, focusing on completing one phase or component before moving on to the next.

Question 8

Component-based software development is generally ________.

Accepted Answer

Component-based software development is considered horizontal because it focuses on creating reusable software components that can be shared across different systems and applications, rather than being tailored for a specific, vertical (industry-specific) application.

Question 9

In ________, we assemble software from independent units that are limited in scope but are well-defined, can be replaced and, given the right functionality, can be recombined into more than one application and in more than one context.

Accepted Answer

Component-based development focuses on building software from modular, interchangeable components, allowing for flexibility, reusability, and scalability in application development.

Question 10

A component is a(n) ________ unit of software that provides services specified by one or more interfaces.

Accepted Answer

Components in software engineering are encapsulated, independent, and replaceable units of software that provide services specified by one or more interfaces, making all of the options correct.

Question 11

A component is ________.

Accepted Answer

Components can be designed to be not language-specific, allowing them to be used in various programming environments. They can also be platform-specific, targeting specific operating systems or environments. Additionally, components are often distributed in binary form to ensure compatibility and ease of use across different development settings.

Question 12

A component is identified by one or more interfaces that act as ________ between the component and its clients.

Accepted Answer

Contracts act as a formal agreement between a component and its clients, specifying the services the component will provide. This allows for clear communication and expectations between the component and its clients, ensuring that the component can be used correctly and effectively.

Question 13

________ properties are those services for which the component was created and are exposed through one or more interfaces.

Accepted Answer

Functional properties are the services or operations provided by a component for which it was created and are exposed through its interfaces.

Question 14

When describing the component itself, the version number, copyright, performance, and security are part of ________.

Accepted Answer

Non-functional properties refer to aspects of a system or component that do not relate to the specific functions the system performs, but rather to how well it performs them or under what conditions. This includes version number, copyright, performance, and security, which are all considerations that affect the system's operation, maintenance, and usage without altering its core functionalities.

Question 15

Components can be modeled as ________.

Accepted Answer

Components in software engineering can be modeled in various ways depending on the level of detail and abstraction required. They can be represented as simple icons for high-level architectural diagrams, as black boxes to denote their interfaces and interactions without detailing the internal workings, or through class diagrams to specify their internal structure and behavior in more detail.

Question 16

Interfaces lack implementation; they must be supported by ________ classes.

Accepted Answer

Interfaces lack their own implementation and rely on concrete classes to provide the actual implementation for the methods defined in the interface.

Question 17

The relationships between components are modeled through a(n) ________.

Accepted Answer

The relationships between components are specifically modeled through a component diagram in UML (Unified Modeling Language). This type of diagram focuses on the organization and wiring of the physical components in a system.

Question 18

Components offer services only through ________.

Accepted Answer

Components offer services through interfaces, which define a set of methods that the component provides to other components or objects. Interfaces act as a contract between the component and the outside world, allowing for communication and interaction without requiring knowledge of the component's internal workings.

Question 19

One essential purpose of component-based architecture is to manage ________.

Accepted Answer

Component-based architecture primarily aims to manage complexity by breaking down a system into manageable, interchangeable, and reusable components.

Question 20

Developing a reusable component for ________ use is more difficult because you have no control over how and where the component will be used.

Accepted Answer

Developing a reusable component for commercial use is more challenging because it must be versatile and robust enough to function in various environments and use cases, which are beyond the developer's control.

Quiz 15: Components Reuse