Node.js API Masterclass with Express and MongoDB - Aggregate - Calculate Average Rating

The video tutorial demonstrates how to calculate and update the average rating for boot camps in a database. It begins by explaining the process of copying and modifying existing methods to calculate average ratings. The tutorial then guides through updating the database schema to include average ratings and testing the implementation by creating users, boot camps, and reviews. Finally, it verifies the functionality by checking the average rating updates as new reviews are added or deleted.

What is the primary goal of the initial section regarding boot camp ratings?

• To delete existing boot camp data

• To calculate the average rating for boot camps

• To calculate the average cost of boot camps

• To introduce a new boot camp model

Which method is primarily used to calculate the average rating in the review model?

• getAverageCost

• getAverageRating

• calculateRating

• computeAverage

What is the purpose of clearing the database during testing?

• To remove unnecessary data

• To ensure a clean slate for testing

• To add new boot camps

• To update the database schema

How is the average rating verified during testing?

• By using a third-party tool

• By checking the database logs

• By manually calculating the average

• By adding reviews and checking the updated average

What happens to the average rating when a new review is added?

• It is deleted

• It is recalculated

• It remains the same

• It decreases

What future functionality is hinted at in the final section?

• Allowing users to update their reviews

• Updating user profiles

• Adding new boot camp categories

• Deleting boot camps

What is the expected outcome when a review is deleted?

• The review is archived

• The average rating is recalculated

• The average rating remains unchanged

• The boot camp is deleted