E-Commerce Development E-Commerce Development APIs and Integrations 2 — Questions and Answers
Question 1: Which approach allows a single GraphQL query to fetch product data, inventory, and pricing in one network round-trip?
- RESTful chaining
- Batch webhooks
- GraphQL query with multiple fields (Correct answer)
- SOAP envelope aggregation
Correct answer: GraphQL query with multiple fields
GraphQL lets clients specify exactly the fields they need across multiple resource types in a single query, reducing over-fetching and multiple round-trips.
Question 2: What is the role of an API gateway in a microservices-based e-commerce architecture?
- It stores product images and static assets
- It acts as a single entry point that routes requests to the appropriate microservice (Correct answer)
- It handles credit card tokenization
- It runs database migrations automatically
Correct answer: It acts as a single entry point that routes requests to the appropriate microservice
An API gateway serves as the single entry point for all client requests, routing them to appropriate microservices while handling cross-cutting concerns like authentication, logging, and rate limiting.
Question 3: In e-commerce integrations, what does 'idempotency' mean for an API endpoint?
- The API returns the same response regardless of authentication
- Making the same request multiple times produces the same result as making it once (Correct answer)
- The endpoint automatically retries failed requests
- The API caches responses for 24 hours
Correct answer: Making the same request multiple times produces the same result as making it once
An idempotent API endpoint ensures that sending the same request multiple times (e.g., due to network retries) does not cause duplicate actions like charging a customer twice.
Question 4: What integration method does Shopify use to allow developers to extend its checkout functionality?
- Direct database access
- Shopify Functions and Checkout Extensibility APIs (Correct answer)
- FTP file uploads
- WebSocket-only connections
Correct answer: Shopify Functions and Checkout Extensibility APIs
Shopify provides Checkout Extensibility APIs and Shopify Functions, which allow developers to customize the checkout experience without forking or modifying Shopify's core codebase.
Question 5: Which type of integration allows an e-commerce platform to sync inventory in real time with a warehouse management system (WMS)?
- Batch file transfer via FTP
- Event-driven integration using webhooks or message queues (Correct answer)
- Manual CSV export/import
- Screen scraping the WMS interface
Correct answer: Event-driven integration using webhooks or message queues
Event-driven integration using webhooks or message queues (e.g., RabbitMQ, Kafka) enables real-time inventory synchronization between the e-commerce platform and the WMS as stock changes occur.
Question 6: What is OAuth 2.0's 'authorization code flow' used for in e-commerce merchant integrations?
- Encrypting the database connection string
- Allowing a merchant to grant a third-party app access to their store data without sharing credentials (Correct answer)
- Generating product barcodes automatically
- Validating shipping addresses with USPS
Correct answer: Allowing a merchant to grant a third-party app access to their store data without sharing credentials
The OAuth 2.0 authorization code flow lets merchants securely grant third-party apps (e.g., accounting tools, ERPs) scoped access to their store data without exposing their username and password.
E-Commerce Development E-Commerce Development APIs and Integrations 2
Which approach allows a single GraphQL query to fetch product data, inventory, and pricing in one network round-trip?