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Creating a GraphQL API in NestJS involves several steps. Here's a step-by-step theoretical guide: Step 1: Setup a New NestJS Project Install Nest CLI: npm install -g @nestjs/cli Enter fullscreen mode Exit fullscreen mode Create a New Project: nest new project-name Enter fullscreen mode Exit fullscreen mode Navigate to the Project Directory: cd project-name Enter fullscreen mode Exit fullscreen mode Step 2: Install GraphQL and Apollo Server Install Required Packages: npm install @nestjs/graphql graphql apollo-server-express Enter fullscreen mode Exit fullscreen mode Step 3: Configure GraphQL Module Create a GraphQL Module Configuration: Open src/app.module.ts and configure the GraphQL module: import {…