035.2 NodeJS Express Basics (weight: 4) WEB-DEVELOPMENT-ESSENTIALS Practice Questions (Page 6)

Questions 26–30

1. 26application · medium

   An Express app serves static files from the 'public' directory. A user requests the URL '/images/logo.png'. The file exists at 'public/images/logo.png'. What will the server do by default?

   • AServe the file at 'public/images/logo.png' with the correct Content-Type header.
   • BServe the file but with the Content-Type set to 'application/octet-stream'.
   • CRedirect the request to '/public/images/logo.png'.
   • DReturn a 404 error because the route '/images/logo.png' is not explicitly defined.
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2. 27foundation · easy

   After configuring express.urlencoded(), where is the submitted form data stored?

   • AIn req.data
   • BIn req.params
   • CIn req.query
   • DIn req.body
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4. 28foundation · easy

   What is Cross-Site Request Forgery (CSRF)?

   • AAn attack that injects malicious scripts into web pages.
   • BAn attack that forces an authenticated user to perform unwanted actions on a web application.
   • CAn attack that steals a user's password through phishing.
   • DAn attack that exploits a vulnerability in the server's database.
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5. 29application · medium

   A registration form submits a username and password. The developer wants to ensure the username is not empty and is at least 3 characters long. Which validation approach is appropriate?

   • AUse express.static to validate the input.
   • BCheck req.body.username for truthiness and length before processing.
   • CAssume the input is valid and process it directly.
   • DRely on the HTML 'required' attribute in the form.
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6. 30foundation · easy

   Which code snippet correctly configures EJS as the view engine in an Express app?

   • Aapp.use('view engine', 'ejs');
   • Bapp.set('view engine', 'ejs');
   • Capp.engine('ejs', require('ejs'));
   • Dapp.set('views', 'ejs');
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