curl for HTTP requests in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to send a simple GET request to example.com using curl.

Linux CLI

curl [1]

Drag options to blanks, or click blank then click option'

A-d 'data' http://example.com

B-X POST http://example.com

Chttp://example.com

D-I http://example.com

Attempts:

3 left

💡 Hint

Common Mistakes

Using -X POST when you want a GET request.

Adding data (-d) when not needed.

Using -I which only fetches headers.

The simplest way to send a GET request with curl is to provide the URL directly without extra options.

2fill in blank

medium

Complete the code to send a POST request with curl to http://example.com.

Linux CLI

curl [1] http://example.com

Drag options to blanks, or click blank then click option'

A-X GET

B-X POST

C-L

D-I

Attempts:

3 left

💡 Hint

Common Mistakes

Using -X GET instead of POST.

Using -I which only fetches headers.

Using -L which follows redirects but does not change method.

Use -X POST to specify the POST method explicitly with curl.

3fill in blank

hard

Fix the error in the curl command to send JSON data with POST to http://example.com.

Linux CLI

curl -X POST -H 'Content-Type: application/json' -d [1] http://example.com

Drag options to blanks, or click blank then click option'

A"name=John"

B{"name":"John"}

C'name=John'

D'{"name":"John"}'

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting JSON properly causing shell errors.

Using URL-encoded format instead of JSON.

Missing quotes causing syntax errors.

JSON data must be a properly quoted string. Single quotes around the JSON string prevent shell issues.

4fill in blank

hard

Fill both blanks to save the output of a curl GET request to a file named response.txt.

Linux CLI

curl [1] [2]

Drag options to blanks, or click blank then click option'

A-o response.txt

Bhttp://example.com

C-O

D-I

Attempts:

3 left

💡 Hint

Common Mistakes

Using -I which only fetches headers.

Using -O which saves with original filename, not custom.

Putting options in wrong order.

Use -o with the filename before the URL to save output to that file.

5fill in blank

hard

Fill all three blanks to send a POST request with JSON data and include a custom header.

Linux CLI

curl [1] -H [2] -d [3] http://example.com

Drag options to blanks, or click blank then click option'

A-X POST

B'Authorization: Bearer token123'

C'{"id":5}'

D-I

Attempts:

3 left

💡 Hint

Common Mistakes

Using -I which only fetches headers.

Not quoting header or data properly.

Missing -X POST option.

Use -X POST to set method, -H for custom header, and -d for JSON data.