Java Interview Guide : 200+ Interview Questions and Answers - What is Coupling?

The video tutorial explains the concept of coupling in software design, emphasizing the importance of minimizing dependencies between classes. It uses a shopping cart example to illustrate tight and low coupling, highlighting the drawbacks of tight coupling and the benefits of low coupling. The tutorial concludes with best practices for achieving low coupling, such as using private instance variables and methods to expose behavior rather than data.

What is the primary goal when managing dependencies between classes?

• To increase the number of dependencies

• To minimize dependencies for low coupling

• To maintain a high level of coupling

• To ensure all classes are interdependent

In the shopping cart example, what is a consequence of tight coupling?

• Changes in one class do not affect others

• It reduces the number of classes needed

• Changes in one class require changes in related classes

• It simplifies the code maintenance

How does low coupling benefit code maintenance?

• It allows changes in one class without affecting others

• It requires frequent changes across multiple classes

• It increases the dependency between classes

• It makes the code more complex

What is a key characteristic of low coupling in object-oriented design?

• Exposing all member variables

• Making all variables public

• Using methods to interact with member variables

• Having no methods in a class

Which practice is recommended to achieve low coupling?

• Interlinking all classes

• Implementing private instance variables with getters and setters

• Avoiding the use of methods

• Using public instance variables

What should you do to practice reducing coupling in your code?

• Refactor code to separate concerns

• Increase the number of classes

• Avoid using any methods

• Combine all classes into one

What is the focus of the example provided in the video?

• To show the benefits of low coupling

• To illustrate the use of public variables

• To explain the concept of inheritance

• To demonstrate high coupling