Express JS Express Template Engines

Question 1

Which app.set() key is used to configure the default template engine in Express?

Accepted Answer

"view engine"

Answer

app.set('view engine', 'ejs') tells Express which template engine to use by default for res.render() calls.

Question 2

What directory does Express look for template files in by default?

Accepted Answer

/views

Answer

Express defaults to a 'views' directory relative to the project root for locating template files.

Question 3

Which method in Express renders a template file and sends the resulting HTML response to the client?

Accepted Answer

res.render()

Answer

res.render() takes a view name and optional data object, compiles the template, and sends the HTML to the client.

Question 4

In EJS, which tag outputs an HTML-escaped variable value?

Accepted Answer

<%= var %>

Answer

<%= var %> escapes the value to prevent XSS, while <%- outputs raw unescaped HTML.

Question 5

How do you pass dynamic data to a template when calling res.render()?

Accepted Answer

res.render('view', { key: value })

Answer

res.render() accepts a view name as the first argument and an optional plain object of local variables as the second argument.

Express JS Practice Test