Q. Can MySQL operations be asynchronous in Node.js?
Yes, using async/await or promises ensures non-blocking database interactions.
Q. How do you handle SQL injection in Node.js?
Always use parameterized queries or ORM methods to avoid injection vulnerabilities.
Q. What are CRUD operations?
CRUD stands for Create, Read, Update, and Delete — the four basic operations performed on a database table.
Q. How do you establish a database connection?
You can use mysql.createConnection() or a connection pool with proper host, user, password, and database credentials.
Q. Which npm package is used for MySQL integration in Node.js?
The mysql2 or sequelize package is commonly used for connecting Node.js to MySQL databases.
Q. What are common debugging challenges with webhooks?
Issues include misconfigured URLs, timeouts, or unverified SSL certificates; tools like ngrok help simulate live webhook testing.
Q. How do you secure webhook communication?
Use secret tokens or HMAC signatures to validate requests and enable HTTPS for secure transmission.
Q. How can Node.js receive webhooks?
Set up an Express.js server that listens on an endpoint (e.g., /webhook) and parses incoming JSON payloads.
Q. How do you send webhooks using Python?
Use libraries like requests to send POST requests with JSON payloads to a receiving endpoint.
Q. What is a webhook?
A webhook is a mechanism that sends real-time data from one application to another when specific events occur.