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Express.js Framework Engineering
Enterprise SQL Integration & Optimization
Quiz
Chapter Quiz: Enterprise SQL Integration & Optimization
Mastery Assessment: Sequelize
Complete this assessment with 100% score to master this chapter.
01
In Sequelize, what is 'Eager Loading'?
Loading data as fast as possible.
Performing a JOIN operation to fetch associated data in a single query.
Loading only the IDs of related objects.
Automatically creating tables.
02
Why is sequelize.sync({ force: true }) dangerous for production?
It makes the database too slow.
It drops all tables and recreates them from scratch, deleting all data.
It only works with SQLite.
It creates duplicate indexes.
03
What is the benefit of a Connection Pool in a relational database setup?
It encrypts the database connection.
It maintains a set of open connections that can be reused, reducing the overhead of establishing new connections.
It allows you to use multiple database dialects at once.
It automatically backs up the database.
04
What is a 'Polymorphic Association' in an ORM?
An association that changes its type at runtime.
When a model can belong to more than one other type of model using a single set of columns (type and ID).
A many-to-many relationship with a join table.
A relationship between two different databases.
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