Learn SOLID Principles – Module S Lesson 4 – Quiz

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Question 1 of 3

1. Question

Why do we consider the separation between DefaultCampaignService and InMemoryCampaignRepository to be a good example of the Single Responsibility Principle? (select all that apply)

Because they change for different reasons: one for business rule changes, the other for storage technology changes
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Because DefaultCampaignService focuses solely on business operations while InMemoryCampaignRepository focuses solely on persistence
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Because DefaultCampaignService inherits from InMemoryCampaignRepository to reuse code
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Because they are located in the same package to reduce visibility
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Question 2 of 3

2. Question

When refactoring the MonolithicCampaignService, where should we move the closeCampaign() method?

To the CampaignRepository, as it involves saving data
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To a new InvoiceService, as it is related to billing
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To the existing DefaultCampaignService, as it is a campaign lifecycle operation
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To the existing DefaultCampaignService, but also keep the method in MonolithicCampaignService so that either implementation can be used
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Question 3 of 3

3. Question

Where did we decide to place the generateInvoice logic to properly separate it from campaign management?

We moved it to the DefaultCampaignService to keep it near the campaign data
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We created a new DefaultInvoiceService class to handle finance-related operations separately
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We kept it in the MonolithicCampaignService but added comments explaining the logic
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We moved it to the CampaignRepository to handle the data fetching more efficiently
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Learn SOLID Principles – Module S Lesson 4 – Quiz

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