What function executes npm install or yarn install as part of your generator?

• A. this.npmInstall()
• B. this.executeInstall()
• C. this.installDependencies()
• D. this.npmInstall() (or this.yarnInstall())

Answer: (D)

In Yeoman generators, you install dependencies using dedicated helper methods. To run npm install, call this.npmInstall(); to run yarn install, call this.yarnInstall(). These methods directly invoke the respective package manager to install the dependencies listed in package.json, fitting neatly into the generator’s lifecycle.

There’s also a helper named installDependencies() that delegates to the detected package manager, but when the question asks for a function that executes npm install or yarn install, the explicit methods for each package manager are the clearest and most direct choice. That’s why this option, which references both possibilities, is the best.