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Which HTTP Status Code to Use for Every CRUD App

100’s=

✔ These are informational status codes; they usually tell the client that the header part of the request has been received and the server will try to comply with a transmission demand of the client.

200’s=

✔ They tell the client that its request was accepted.

300’s=

✔ They tell the client that the resource they are requesting isn’t available at the expected location anymore.

400’s=

✔ They are all about invalid requests a client sent to a server.

500’s=
Often they indicate problems with overwhelmed servers or unreachable servers behind proxies, but sometimes they can be directly related to client requests that trigger error exceptions on the server.

  • What is a status code 202? ✔ this doesn’t mean the request was successfully processed only that it met all validation requirements at the time of sending.

  • What is a status code 308? ✔ This tells the client to use another URL to access the resource and not use the current URL anymore

  • What code would you use if an update didn’t return data to a client?

✔ 204 No Content,for example when just saving a currently edited document.

  • What code would you use if a resource used to exist but no longer does?

✔ 410 Gone

  • What is the ‘Forbidden’ status code?

✔ 403 Forbidden - The client has authorized or doesn’t need to authorize itself, but still has no permissions to access the resource

Mongo-DB

  • What is middleware?

Middleware is software that provides common services and capabilities to applications outside of what’s offered by the operating system.

  • What does app.use(express.json()) do?

is a method inbuilt in express to recognize the incoming Request Object as a JSON Object.

  • What does the /:id mean in a route?

pass a parameter

  • What is the difference beween PUT and PATCH?

The main difference between the PUT and PATCH method is that the PUT method uses the request URI to supply a modified version of the requested resource which replaces the original version of the resource, whereas the PATCH method supplies a set of instructions to modify the resource.

  • How do you make a defalut value in a schema?
category: {
    type: String,
    default: ''
}
  • What does a 500 error status code mean?

server error response code indicates that the server encountered an unexpected condition that prevented it from fulfilling the request.

  • What is the difference between a status 200 and a status 201?

200: It means, simply, that the request was received and understood and is being processed 201:status code indicates that a request was successful and as a result, a resource has been created (for example a new page).