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

Question 1

What is JWT (JSON Web Token) primarily used for in full-stack applications?

Accepted Answer

Stateless authentication by encoding user claims in a signed token

Answer

JWTs encode user identity and claims in a signed token that the server can verify without maintaining session state.

Question 2

What is 'continuous integration' (CI) in the context of full-stack development?

Accepted Answer

Automatically building and testing code whenever changes are pushed

Answer

CI pipelines automatically build and run tests on every code push to catch regressions early.

Question 3

Which of the following is a primary benefit of containerizing a full-stack application with Docker?

Accepted Answer

It ensures consistent environments across development, testing, and production

Answer

Docker containers bundle the app and its dependencies so the same image runs identically on any machine.

Question 4

In full-stack development, what does 'horizontal scaling' mean?

Accepted Answer

Adding more server instances to distribute the load

Answer

Horizontal scaling adds more machines running the same application to handle increased traffic.

Question 5

What is the role of a reverse proxy like Nginx in a full-stack deployment?

Accepted Answer

To sit in front of app servers and forward client requests to them

Answer

A reverse proxy receives client requests and forwards them to back-end application servers, handling SSL termination and load balancing.

Back-End Development Practice Test