HTTP & Express interview questions

1. A.the callback that passes control to the next middleware; next(err) jumps to error handlers
2. B.sets the HTTP status code and sends a JSON response body
3. C.params are route path segments like /users/:id; query is the ?key=value string
4. D.an Express function (req, res, next) run in order to process a request

Answer + AI explanation with Pro

1. A.Middleware
2. B.req.params vs req.query
3. C.Error-handling middleware
4. D.res.status().json()

Answer + AI explanation with Pro

1. A.Middleware — an Express object that groups related routes for modular mounting
2. B.Middleware — sets the HTTP status code and sends a JSON response body
3. C.Middleware — params are route path segments like /users/:id; query is the ?key=value string
4. D.Middleware — an Express function (req, res, next) run in order to process a request

Answer + AI explanation with Pro

1. A.params are route path segments like /users/:id; query is the ?key=value string
2. B.the callback that passes control to the next middleware; next(err) jumps to error handlers
3. C.sets the HTTP status code and sends a JSON response body
4. D.an Express object that groups related routes for modular mounting

Answer + AI explanation with Pro

1. A.next()
2. B.Router
3. C.req.params vs req.query
4. D.Middleware

Answer + AI explanation with Pro

1. A.Router — an Express function (req, res, next) run in order to process a request
2. B.Router — an Express object that groups related routes for modular mounting
3. C.Router — the callback that passes control to the next middleware; next(err) jumps to error handlers
4. D.Router — sets the HTTP status code and sends a JSON response body

Answer + AI explanation with Pro

1. A.an Express function (req, res, next) run in order to process a request
2. B.the callback that passes control to the next middleware; next(err) jumps to error handlers
3. C.an Express object that groups related routes for modular mounting
4. D.middleware with four arguments (err, req, res, next) that handles errors passed to next

Answer + AI explanation with Pro

1. A.Router
2. B.Middleware
3. C.next()
4. D.res.status().json()

Answer + AI explanation with Pro

1. A.next() — sets the HTTP status code and sends a JSON response body
2. B.next() — middleware with four arguments (err, req, res, next) that handles errors passed to next
3. C.next() — the callback that passes control to the next middleware; next(err) jumps to error handlers
4. D.next() — an Express object that groups related routes for modular mounting

Answer + AI explanation with Pro

1. A.an Express object that groups related routes for modular mounting
2. B.the callback that passes control to the next middleware; next(err) jumps to error handlers
3. C.middleware with four arguments (err, req, res, next) that handles errors passed to next
4. D.params are route path segments like /users/:id; query is the ?key=value string

Answer + AI explanation with Pro

1. A.next()
2. B.req.params vs req.query
3. C.Router
4. D.Error-handling middleware

Answer + AI explanation with Pro

1. A.req.params vs req.query — an Express object that groups related routes for modular mounting
2. B.req.params vs req.query — params are route path segments like /users/:id; query is the ?key=value string
3. C.req.params vs req.query — an Express function (req, res, next) run in order to process a request
4. D.req.params vs req.query — the callback that passes control to the next middleware; next(err) jumps to error handlers

Answer + AI explanation with Pro

1. A.middleware with four arguments (err, req, res, next) that handles errors passed to next
2. B.the callback that passes control to the next middleware; next(err) jumps to error handlers
3. C.sets the HTTP status code and sends a JSON response body
4. D.an Express object that groups related routes for modular mounting

Answer + AI explanation with Pro

1. A.next()
2. B.req.params vs req.query
3. C.Error-handling middleware
4. D.res.status().json()

Answer + AI explanation with Pro

1. A.res.status().json() — sets the HTTP status code and sends a JSON response body
2. B.res.status().json() — an Express function (req, res, next) run in order to process a request
3. C.res.status().json() — middleware with four arguments (err, req, res, next) that handles errors passed to next
4. D.res.status().json() — the callback that passes control to the next middleware; next(err) jumps to error handlers

Answer + AI explanation with Pro

1. A.sets the HTTP status code and sends a JSON response body
2. B.an Express object that groups related routes for modular mounting
3. C.middleware with four arguments (err, req, res, next) that handles errors passed to next
4. D.the callback that passes control to the next middleware; next(err) jumps to error handlers

Answer + AI explanation with Pro

1. A.next()
2. B.res.status().json()
3. C.req.params vs req.query
4. D.Error-handling middleware

Answer + AI explanation with Pro

1. A.Error-handling middleware — an Express object that groups related routes for modular mounting
2. B.Error-handling middleware — middleware with four arguments (err, req, res, next) that handles errors passed to next
3. C.Error-handling middleware — sets the HTTP status code and sends a JSON response body
4. D.Error-handling middleware — the callback that passes control to the next middleware; next(err) jumps to error handlers

Answer + AI explanation with Pro