What's better Spring Framework (Reactive) Or ExpressJS ?

in Angular is it a bad practice to use .subscribe() in components?

I've read that using .subscribe in component is considered a bad practice and that async pipe is a better alternative. I'm asking for examples and why.

How to upload and save in database (link) to image in Spring Boot REST?

I have followed a lot of tutorials that only upload the image via REST Spring boot but I want that my endpoint return a link to the image (ex : http://localhost:8080/api/upload/myimage.png)

In Spring Framework, Should I work with repository (Spring Data REST) result or create a RestController and service for each repository I want to work with?

Is it wrong to have a table with only one column?

For example Languages (ID of Language, Language) or Cities (ID of city, city name) instead of using for example in the backend a JSON file that holds all the data. So what's better using a single table in a database or use JSON file?

How to check if data changed in RESTful api with Angular 2/4 ?

I have an application that gets data from RESTful api but I want to know how I can refresh data without reloading the page? Should I write an observer that checks data each 2min for example? but how can I make that real-time (isn't it bad to send too...

Should I use local/session storage or cookie to store access/refresh token?

I created an api that sends a user "access token" and "refresh token" in order to use them for authentication and refresh the access token. I'm using Angular on client side , the problem I have there is a lot of discussion and ways to store those tok...

How to restrict access to REST API data?

For example, I have a table in database that contains students. When I create API to access this resource /students, even with authorization the student (if they know the url) can access to other student’s private information by just changing id in r...

Should the RESTful JSON API contain multiple arrays, or is that bad?

If I choose to expose only simple data without array .. then the client is responsible for joining data between multiple endpoint of restful api ?

What's the best solution using only RESTful api or using backend framework + RESTful api (when needed)?

I want to know what's the best solution among this one : Using RESTful api + Consume it from my website Using a backend framework like Spring , Rails then when I need RESTful api I create it so I will have 2 projects.