Template variables with double braces in Django - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What is the rendered output of this Django template snippet?

Given the context {'user': {'name': 'Alice', 'age': 30}}, what will this template output?

{% raw %}Hello, {{ user.name }}! You are {{ user.age }} years old.{% endraw %}

A Hello, Alice! You are {{ user.age }} years old.

B Hello, {{ user.name }}! You are {{ user.age }} years old.

C Hello, user.name! You are user.age years old.

D Hello, Alice! You are 30 years old.

💡 Hint

Remember that double braces {{ }} output the value of the variable from the context.

The double braces {{ user.name }} and {{ user.age }} are replaced by the values from the context dictionary. So 'Alice' and '30' appear in the output.

📝 Syntax

intermediate

Which option correctly outputs the value of a variable in a Django template?

You want to display the value of the variable title in your Django template. Which syntax is correct?

A {{ title }}

B {% title %}

C {# title #}

D [[ title ]]

💡 Hint

Variables in Django templates are enclosed in double curly braces.

In Django templates, variables are displayed using double curly braces like {{ title }}. Other options are either template tags, comments, or invalid syntax.

🔧 Debug

advanced

What error occurs when using undefined variable in double braces?

Consider this template snippet:

{% raw %}Hello, {{ user.full_name }}!{% endraw %}

Given the context {'user': {}}, what happens when rendering?

A Outputs: Hello, ! (empty string for missing variable)

B TemplateSyntaxError: 'full_name' is not defined

C Raises KeyError at runtime

D Outputs: Hello, {{ user.full_name }}!

💡 Hint

Django templates silently ignore missing variables by default.

If a variable or attribute is missing in the context, Django outputs an empty string instead of raising an error.

🧠 Conceptual

advanced

How does Django template handle nested dictionary variables with double braces?

Given context {'product': {'name': 'Book', 'price': 12.99}}, what does this template output?

{% raw %}Product: {{ product.name }}, Price: ${{ product.price }}{% endraw %}

A Product: {{ product.name }}, Price: ${{ product.price }}

B Product: Book, Price: $12.99

C Product: Book, Price: ${{ price }}

D Product: product.name, Price: $product.price

💡 Hint

Double braces access nested dictionary keys using dot notation.

Django templates allow accessing nested dictionary keys with dot notation inside double braces, so the values are replaced correctly.

❓ state_output

expert

What is the output when using a filter with double braces in Django template?

Given context {'name': 'alice'}, what is the output of this template?

{% raw %}Hello, {{ name|capfirst }}!{% endraw %}

A Hello, ALICE!

B Hello, alice!

C Hello, Alice!

D Hello, {{ name|capfirst }}!

💡 Hint

The capfirst filter capitalizes the first letter of the string.

The capfirst filter changes the first character to uppercase, so 'alice' becomes 'Alice'.