Project scaffolding in NestJS - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What is the default folder created for controllers in a new NestJS project?

When you create a new NestJS project using the CLI, which folder is automatically created to hold controller files?

A src/controllers

B src/modules

C src

D crs

💡 Hint

Think about where the CLI places files that handle incoming requests.

The NestJS CLI creates a 'src' folder by default to organize controller files that handle HTTP requests.

📝 Syntax

intermediate

Which command scaffolds a new NestJS project with npm?

Choose the correct command to create a new NestJS project named 'my-app' using npm.

A nestjs new my-app

B nest new my-app

C npm create nest-app my-app

D npm init nest my-app

💡 Hint

The NestJS CLI uses a simple 'nest' command.

The correct command is 'nest new my-app' which uses the Nest CLI to scaffold a new project.

🔧 Debug

advanced

What error occurs if you run 'nest new' without Node.js installed?

If you try to scaffold a new NestJS project using 'nest new project-name' but Node.js is not installed, what error will you see?

A Command 'nest' not found

B SyntaxError: Unexpected token

C Error: Cannot find module 'nestjs'

D TypeError: nest is not a function

💡 Hint

If Node.js is missing, the CLI command itself won't run.

Without Node.js, the system cannot recognize the 'nest' command, resulting in 'Command 'nest' not found'.

❓ state_output

advanced

After scaffolding, what file contains the main application bootstrap code?

In a freshly created NestJS project, which file contains the code that starts the application?

A src/main.ts

B src/app.module.ts

C src/server.js

D src/index.ts

💡 Hint

Look for the file that calls 'NestFactory.create()'.

The 'src/main.ts' file contains the bootstrap function that starts the NestJS application.

🧠 Conceptual

expert

Which option best describes the purpose of the 'app.module.ts' file in NestJS scaffolding?

What is the main role of the 'app.module.ts' file created by the NestJS CLI in a new project?

A It manages database connections and ORM setup automatically

B It contains the main server configuration and HTTP listener setup

C It holds all the environment variables and configuration settings

D It defines the root module that organizes controllers and providers for the app

💡 Hint

Think about how NestJS groups features and services.

The 'app.module.ts' file defines the root module that groups controllers, providers, and imports to organize the app structure.