Template filters (date, length, default) in Django - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What is the output of this Django template snippet?

Given the context variable my_date with value 2024-06-15, what will this template output?

{{ my_date|date:"Y-m-d" }}

A June 15, 2024

B 06/15/2024

C 15-06-2024

D 2024-06-15

💡 Hint

The date filter formats the date according to the given string pattern.

The filter uses the format string 'Y-m-d' which means 4-digit year, dash, 2-digit month, dash, 2-digit day.

❓ state_output

intermediate

What is the length output of this list in a Django template?

Given the context variable items as ["apple", "banana", "cherry"], what does this template output?

{{ items|length }}

A 5

B 3

C 0

D Error

💡 Hint

The length filter counts the number of items in a list.

The list has three elements, so length returns 3.

📝 Syntax

advanced

Which template filter usage correctly provides a default value?

You want to display the variable username but show 'Guest' if it is empty or undefined. Which option does this correctly?

A {{ username|default_guest }}

B {{ username|default_if_none:"Guest" }}

C {{ username|default:"Guest" }}

D {{ username|default('Guest') }}

💡 Hint

The default filter replaces empty or undefined variables with the given string.

The default filter takes a string argument in quotes. default_if_none only replaces None, not empty strings.

🔧 Debug

advanced

Why does this template raise an error?

Template snippet:

{{ my_date|date:Y-m-d }}

Assuming my_date is a valid date object, why does this cause an error?

A Missing quotes around the date format string causes a syntax error

B my_date is not a date object

C The date filter does not accept format strings

D The pipe symbol is invalid here

💡 Hint

Check how the date format string is passed to the filter.

The date filter requires the format string to be quoted. Without quotes, the template parser throws an error.

🧠 Conceptual

expert

What is the output of this Django template code?

Given the context variable user_name with value None, what does this template output?

{{ user_name|default:"Anonymous"|length }}

A 9

B 0

C Error

D None

💡 Hint

The default filter replaces None with 'Anonymous', then length counts characters.

user_name is None, so default replaces it with 'Anonymous'. The length filter then counts the characters in 'Anonymous', which is 9.