Full-Stack Development An Intro to Full-Stack Development 5

Question 1

What is the difference between authentication and authorization in a web application?

Accepted Answer

Authentication verifies who a user is; authorization determines what they are allowed to do

Answer

Authentication confirms identity (who you are), while authorization enforces permissions (what you can access).

Question 2

Which tool is most commonly used to containerize a full-stack application for consistent environments across development and production?

Accepted Answer

Docker

Answer

Docker packages an application and its dependencies into a container image that runs identically in any environment.

Question 3

What is 'lazy loading' in the context of a React application?

Accepted Answer

Deferring the loading of components or resources until they are actually needed

Answer

Lazy loading defers importing components or data until they are needed, reducing initial bundle size and load time.

Question 4

In a relational database, what does a foreign key enforce?

Accepted Answer

That values in a column match a primary key in another table, maintaining referential integrity

Answer

A foreign key constraint ensures that a column's values correspond to existing primary key values in a referenced table.

Question 5

What is the primary benefit of using TypeScript over plain JavaScript in a full-stack project?

Accepted Answer

TypeScript adds static type checking that catches errors at compile time before runtime

Answer

TypeScript's static type system surfaces type mismatches and interface violations during development before the code runs.

Full-Stack Development Practice Test