FlexiQuiz - Are you Singularly SOLID?

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1. Does the following code follow the Single Responsibility Principle?

function createBlogPost(author, date, tags, content) {
generateHeader(author,date)
insertContent(content)
generateFooter(tags)
}

No, generateHeader might change for different reasons than generateFooter

Yes, it only contains calls to functions.

No, it does three things.

Yes, the only reason this function would change is if blog posts needed to be created differently

2. You are tasked with adding a new type of item to an online retail store. The item is unique because it comes in multiple colors and also can be purchased with different currencies depending on the shipping address.
Based on the Single Responsibility Principle, how many responsibilities exist in this task?

There are 2 responsibilities. The color feature might change separately from the currency feature.

There are 2 responsibilities. Displaying the item and buying the item.

There is 1 responsibility. A new item with two new unique properties, color and currency.

There are 4 responsibilities. The shopping cart needs to both detect the destination and set currencies by destination. The catalog needs to create a color picker and set the color picker,

There are 3 responsibilities. The item currency logic might change, the shipping address logic might change, and the color might change.

3. What does Single Responsibility mean in the Single Responsibility Principle?

Work is not shared by others

The function contains no if or switch statements.

The word "and" or "or" is missing from the name.

A single source of responsibility

The function has only a single variable or single statement.

A single reason to change

4. Does the following code adhere to the Single Responsibility principle?

function detectLanguageHandler(req,resp) {
var language = '';
if (req.params.greeting === "hello") {

language = "English;
} else if (req.params.greeting === "bonjour" ) {

language = "French"

} else {

return resp.reply("Invalid greeting input").statusCod(422);

return resp.reply("Detected langauge is " + language).statusCode(200).
}

No, it detects the language and sets the language response.

No, it can change for two reasons. The language algorithm or the http client.

Yes, all it does is return the language detected.

No, it returns the detected language but might return an error.

5. Why is high cohesion not a violation of the Single Responsibility Principle?

High cohesion means that all the different parts of your class change for the same business reason

High cohesion violates the Single Responsibility Principle, because data and functions exist in the same file.

High cohesion doesn't violate the principle, because high cohesion and low coupling is an Object oriented principle.

High cohesion means your class has different parts, and therefore it IS a violation.

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