How is integration with WebSocket protocol implemented on the frontend?
Middle
284
Frontend
6300
681
What is the difference between FormGroup and FormArray?
Middle
263
What directives in Angular do you know? How to create a custom attribute and structural directive?
Middle
245
What is CORS? What is a preflight request (OPTIONS)? For which requests is it sent, and for which is it not?
Middle
182
What is the idempotency of HTTP methods? Which methods are idempotent and which are not? What is the difference between PUT and PATCH?
Middle
156
What is a Progressive Web Application (PWA)?
Middle
153
Is a class in ES6 a fundamentally new construct or syntactic sugar over a constructor function?
Middle
150
What are validators in reactive forms? What do they accept and return?
Middle
150
What do you know about Angular Signals? What are the basic APIs and entities?
Middle
148
What state flags does FormControl have?
Middle
148
What is WebSocket? How is a WebSocket connection established? Why does the browser send an HTTP request during connection setup and what does status 101 mean?
Middle
147
Tell me about the methods Promise.all, Promise.race, and Promise.allSettled. What are their differences?
Middle
144
What is the WebSocket protocol and what is its essence, when is it used?
Middle
144
Analysis of a practical example with Promise: in what order will console.log be output when using the chain of .then/.catch? What will happen if you remove return from catch?
Middle
143
Is Store needed for all Angular applications or not? If not, which ones need it?
Middle
142
Have you ever configured Babel? What is it? Have you ever assembled Webpack or used its alternatives?
Middle
141
Have you worked with GraphQL? Do you know the difference between GraphQL and REST API?
Middle
140
What do you know about the project you are being considered for?
Middle
140
What are the classic approaches to working with forms in Angular?
Middle
138
Where is it better to use Signals, and where to use RxJS?
Middle
136