035.2 NodeJS Express Basics (weight: 4) WEB-DEVELOPMENT-ESSENTIALS Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   In the route handler app.get('/user', (req, res) => { res.render('profile', { name: 'Alice' }); }), how can the template 'profile.ejs' access the value 'Alice'?

   • ABy using the variable name directly, e.g., <%= name %>
   • BBy using req.query.name
   • CBy using res.locals.name
   • DBy using app.locals.name
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2. 22foundation · easy

   How can you serve a static file named 'index.html' when a user visits the root path '/'?

   • ADefine a route app.get('/', (req, res) => res.sendFile('index.html')) without specifying the full path.
   • BUse app.use(express.static('public', { index: false })) to serve index.html.
   • CCreate a route that redirects '/' to '/index.html'.
   • DPlace 'index.html' in the static directory and use express.static.
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4. 23foundation · easy

   Which middleware is required to access form data submitted via POST in Express?

   • Aexpress.bodyParser()
   • Bexpress.query()
   • Cexpress.urlencoded({ extended: true })
   • Dexpress.json()
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5. 24expert · hard

   An EJS template needs to display a list of items from an array passed as 'items'. Each item has a 'name' property. The developer wants to show 'No items' if the array is empty. Which EJS code correctly handles this?

   • A<% if (items.length > 0) { %> <% items.forEach(item => { %> <p><%= item.name %></p> <% }); %> <% } else { %> <p>No items</p> <% } %>
   • B<%= items.length > 0 ? items.map(item => `<p>${item.name}</p>`).join('') : 'No items' %>
   • C<% items.forEach(item => { %> <p><%= item.name %></p> <% }); %>
   • D<% if (items) { %> <p><%= items.name %></p> <% } else { %> <p>No items</p> <% } %>
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6. 25foundation · easy

   How can EJS templates help prevent XSS attacks?

   • ABy using <%- %> for all output.
   • BBy escaping output with <%= %> by default.
   • CBy automatically sanitizing all user input.
   • DBy disabling JavaScript in the browser.
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