Express JS Express Template Engines 3

Question 1

What is the primary purpose of view caching in Express?

Accepted Answer

Storing compiled templates in memory to avoid recompilation on every request

Answer

Caching HTTP responses in the browser using Cache-Control headers

Answer

Saving rendered HTML output files to disk for static serving

Answer

Compressing template source files to reduce bundle size

Question 2

How can view caching be enabled in Express?

Accepted Answer

Either app.set('view cache', true) or app.enable('view cache')

Answer

Only via app.set('view cache', true)

Answer

Only via app.enable('view cache')

Answer

Via app.cache('views', true)

Question 3

In Pug templates, which keyword includes another Pug file into the current template?

Accepted Answer

include

Answer

extend

Answer

require

Answer

import

Question 4

What benefit does setting a default 'view engine' provide in Express?

Accepted Answer

Removes the need to specify file extensions in res.render() calls

Answer

Automatically installs the template engine npm package

Answer

Enables hot-reloading of template files during development

Answer

Generates templates automatically from JSON route definitions

Question 5

Which object's properties are automatically merged and available as local variables in all rendered templates?

Accepted Answer

app.locals

Answer

req.locals

Answer

res.session

Answer

process.env

Question 6

What happens in Express when res.render() is called but the specified template file does not exist?

Accepted Answer

An Error object is passed to the next error-handling middleware

Answer

An empty response body is sent with a 200 status

Answer

Express serves a built-in default 404 template

Answer

Express falls back to rendering with the default view engine's sample template

Question 7

Which template engine uses indentation-based whitespace-sensitive syntax instead of traditional HTML closing tags?

Accepted Answer

Pug

Answer

EJS

Answer

Handlebars

Answer

Mustache