The video tutorial introduces the DRY principle and its application in try-catch blocks within controller methods. It explains how to use async/await functions as middleware in Express and demonstrates creating an async handler to simplify error handling. The tutorial covers implementing the async handler in controller methods, testing its functionality, and validating error handling. Finally, it introduces Mongoose middleware and its potential applications.

What is the main goal of the DRY principle in programming?

• To make code more secure

• To avoid repeating code unnecessarily

• To ensure code runs faster

• To write code that is easy to read

What is the purpose of creating an async handler in Express?

• To simplify error handling in async functions

• To improve database performance

• To manage user sessions

• To handle synchronous functions

How does the async handler improve the code structure?

• By removing the need for try-catch blocks

• By increasing the number of functions

• By making the code less readable

• By adding more lines of code

What is the result of removing try-catch blocks in the controller methods?

• The code becomes cleaner and more maintainable

• The error handling is disabled

• The code becomes more complex

• The code execution slows down

What is verified during the testing of the new async handler setup?

• The correctness of error handling

• The database schema

• The user interface design

• The speed of the application

What additional functionality does Mongoose middleware provide?

• It allows for real-time data processing

• It enables the creation of slugs and handling of addresses

• It manages user authentication

• It improves the security of the application

What is the purpose of creating a slug in the boot camp model?

• To enhance the visual design

• To improve search engine optimization

• To increase the speed of data retrieval

• To secure the application