Brotli compression in Nginx - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

Check if Brotli module is enabled in nginx

You run the command nginx -V 2>&1 | grep brotli on your server. What output indicates that the Brotli module is enabled?

Nginx

nginx -V 2>&1 | grep brotli

A

nginx version: nginx/1.21.0
built with OpenSSL 1.1.1
--with-http_gzip_module

B

nginx version: nginx/1.21.0
built with OpenSSL 1.1.1
--without-http_brotli_module

C

nginx version: nginx/1.21.0
built with OpenSSL 1.1.1
--with-http_brotli_module

D command not found

💡 Hint

Look for the phrase '--with-http_brotli_module' in the output.

The presence of '--with-http_brotli_module' in the nginx version configuration output means the Brotli module is compiled and enabled.

❓ Configuration

intermediate

Enable Brotli compression in nginx config

Which nginx configuration snippet correctly enables Brotli compression for text and JSON files?

A

brotli enable yes;
brotli_types text/plain application/json;

B

brotli on off;
brotli_types application/xml;

C

brotli on;
brotli_types text/html image/png;

D

brotli on;
brotli_types text/plain application/json;

💡 Hint

The directive to enable Brotli is 'brotli on;' and you specify file types with 'brotli_types'.

Option D correctly uses 'brotli on;' to enable compression and sets 'brotli_types' to compress text/plain and application/json files.

❓ Troubleshoot

advanced

Why is Brotli compression not working for CSS files?

You enabled Brotli compression in nginx but CSS files are not compressed. Which is the most likely cause?

A The 'brotli_types' directive does not include 'text/css'.

B Brotli compression only works for images, not CSS.

C The 'brotli on;' directive is missing from the server block.

D CSS files are too small to be compressed by Brotli.

💡 Hint

Check which MIME types are listed in 'brotli_types'.

If 'text/css' is not included in 'brotli_types', nginx will not compress CSS files with Brotli.

🔀 Workflow

advanced

Order the steps to enable Brotli compression in nginx

Put these steps in the correct order to enable Brotli compression on an nginx server.

A 3,1,2,4

B 1,2,3,4

C 1,3,2,4

D 2,1,3,4

💡 Hint

You must install the module before configuring it, then test and reload.

First install the module, then configure nginx, test the config, and finally reload nginx to apply changes.

✅ Best Practice

expert

Best practice for Brotli compression level in nginx

Which Brotli compression level setting balances good compression and server performance in nginx?

A brotli_comp_level 5;

B brotli_comp_level 1;

C brotli_comp_level 0;

D brotli_comp_level 11;

💡 Hint

Higher levels compress better but use more CPU time.

Level 5 is a good balance between compression ratio and CPU usage; level 11 is slow, level 1 is fast but less compressed.