Twig 3 Certification Test

Instructions

This test consists of 45 questions about Twig 3. It covers 8 topics and has a time limit of 60 minutes. Choose the best answer for each question.

Questions

Basic Concepts

1. What is the default file extension for Twig templates?

   • A) .twig
   • B) .tpl
   • C) .html
   • D) .php

2. What syntax is used to display a variable in Twig?

   • A) {% variable %}
   • B) {{ variable }}
   • C) [[ variable ]]
   • D) << variable >>

3. How do you escape output in Twig?

   • A) {{ variable|escape }}
   • B) {{ escape(variable) }}
   • C) {% escape variable %}
   • D) {{ variable|safe }}

Filters

1. Which of the following is NOT a valid Twig filter?

   • A) trim
   • B) replace
   • C) capitalize
   • D) substring

2. What does the |raw filter do in Twig?

   • A) Escapes HTML
   • B) Outputs unescaped HTML
   • C) Converts to string
   • D) Formats dates

3. Which filter would you use to convert a string to lowercase in Twig?

   • A) lower
   • B) lowercase
   • C) toLower
   • D) downcase

Tests

1. Which of the following is a valid Twig test?

   • A) even
   • B) odd
   • C) divisibleby
   • D) All of the above

2. How do you check if a variable is defined using a test in Twig?

   • A) {% if variable is defined %}
   • B) {% if defined(variable) %}
   • C) {% if variable exists %}
   • D) {% if variable is set %}

Control Structures

1. What is the correct syntax for a Twig for loop?

   • A) {% for item in items %}
   • B) {% loop item in items %}
   • C) {% each item in items %}
   • D) {% iterate items %}

2. How do you create an if-else statement in Twig?

   • A) {% if condition %}{% else %}{% endif %}
   • B) {% if condition %}{% elseif condition %}{% else %}{% endif %}
   • C) {% if condition %}{% elif condition %}{% else %}{% endif %}
   • D) Both B and C

Variables and Expressions

1. How do you define a variable in Twig?

   • A) {% set variable = value %}
   • B) {{ variable = value }}
   • C) << variable = value >>
   • D) [set variable = value]

2. What is the output of {{ 5 + 5 }}?

   • A) 10
   • B) 55
   • C) 5 + 5
   • D) Error

Functions

1. Which of the following is a valid Twig function?

   • A) date()
   • B) length()
   • C) json_encode()
   • D) All of the above

2. What function would you use to include a template and pass variables to it?

   • A) include()
   • B) render()
   • C) include_with()
   • D) render_with()

Operators

1. What operator is used to concatenate strings in Twig?

   • A) +
   • B) .
   • C) &
   • D) ,

2. Which of the following is a valid Twig operator?

   • A) ==
   • B) ===
   • C) !=
   • D) All of the above

Template Re-use

1. How do you extend a parent template in Twig?

   • A) {% extends 'parent.twig' %}
   • B) {% inherit 'parent.twig' %}
   • C) {% include 'parent.twig' %}
   • D) {% use 'parent.twig' %}

2. What is the purpose of the include tag in Twig?

   • A) To include a template fragment
   • B) To embed a template
   • C) To extend a parent template
   • D) To define a macro

Mixed Questions

1. What is the output of {{ [1, 2, 3]|join(', ') }}?

   • A) 1, 2, 3
   • B) [1, 2, 3]
   • C) "1, 2, 3"
   • D) 1 2 3

2. How do you create a Twig environment?

   • A) new Twig_Environment()
   • B) new Twig\Environment()
   • C) Twig::createEnvironment()
   • D) Twig\Environment::new()

3. What is the purpose of the with keyword in Twig?

   • A) To define a variable
   • B) To pass variables to included templates
   • C) To create a loop
   • D) To filter output

4. How do you define a macro in Twig?

   • A) {% macro name() %}
   • B) {% define macro name() %}
   • C) {% function name() %}
   • D) {% template name() %}

5. What is the correct syntax for a Twig comment?

   • A) {# This is a comment #}
   • B) <!-- This is a comment -->
   • C) {% comment %} This is a comment {% endcomment %}
   • D) // This is a comment

6. How do you create a loop that iterates over a range of numbers in Twig?

   • A) {% for i in 1..10 %}
   • B) {% for i from 1 to 10 %}
   • C) {% for i in range(1, 10) %}
   • D) All of the above

7. What is the purpose of the |slice filter in Twig?

   • A) To extract a substring
   • B) To format a string
   • C) To split a string
   • D) To remove whitespace

Advanced Questions

1. How do you create a custom filter in Twig?

   • A) {% filter name %}
   • B) {% define filter name %}
   • C) {% filter name(value) %}
   • D) {% filter(name) %}

2. What is the output of {{ "Hello"|upper }}?

   • A) Hello
   • B) hello
   • C) HELLO
   • D) hElLo

3. How do you create a conditional statement that checks if a variable is empty?

   • A) {% if variable is empty %}
   • B) {% if empty(variable) %}
   • C) {% if variable == null %}
   • D) {% if variable is defined and variable is not null %}

4. What is the purpose of the |join filter in Twig?

   • A) To join two strings
   • B) To join an array into a string
   • C) To join two arrays
   • D) None of the above

5. How do you create a nested block in Twig?

   • A) {% block outer %}{% block inner %}{% endblock %}{% endblock %}
   • B) {% block outer %}{% block inner %}
   • C) {% block outer %}{% endblock %}{% block inner %}{% endblock %}
   • D) {% block outer %}{% endblock inner %}

6. What is the output of {{ 5 / 2 }}?

   • A) 2
   • B) 2.5
   • C) 2.0
   • D) 2.50

7. How do you create a loop that iterates over a hash in Twig?

   • A) {% for key, value in hash %}
   • B) {% for value in hash %}
   • C) {% for key => value in hash %}
   • D) {% for item in hash %}

8. What is the purpose of the |default filter in Twig?

   • A) To provide a default value if a variable is undefined or null
   • B) To format a date
   • C) To convert a string to lowercase
   • D) To escape HTML

9. How do you create a nested if statement in Twig?

   • A) {% if condition1 %}{% if condition2 %}{% endif %}{% endif %}
   • B) {% if condition1 and condition2 %}
   • C) {% if condition1 or condition2 %}
   • D) {% if condition1 %}{% elseif condition2 %}{% endif %}

10. What is the purpose of the |format filter in Twig?

    • A) To format a string with placeholders
    • B) To format a date
    • C) To format a number
    • D) To format a boolean

Advanced Questions (continued)

1. How do you create a loop that iterates over a hash and preserves the keys?

   • A) {% for key, value in hash %}
   • B) {% for value in hash %}
   • C) {% for key => value in hash %}
   • D) {% for item, value in hash %}

2. What is the purpose of the |merge filter in Twig?

   • A) To merge two arrays
   • B) To merge two hashes
   • C) To merge two strings
   • D) To merge two variables

3. How do you create a loop that iterates over a hash and preserves the keys as variables?

   • A) {% for key, value in hash %}
   • B) {% for value in hash %}
   • C) {% for key => value in hash %}
   • D) {% for key, value in hash with keys %}

4. What is the purpose of the |sort filter in Twig?

   • A) To sort an array in ascending order
   • B) To sort an array in descending order
   • C) To sort a hash by keys
   • D) To sort a hash by values

5. How do you create a loop that iterates over a hash and preserves the keys as variables with a custom separator?

   • A) {% for key, value in hash %}
   • B) {% for value in hash %}
   • C) {% for key => value in hash %}
   • D) {% for key, value in hash with keys using separator '.' %}

6. What is the purpose of the |reverse filter in Twig?

   • A) To reverse a string
   • B) To reverse an array
   • C) To reverse a hash
   • D) To reverse a number

7. How do you create a loop that iterates over a hash and preserves the keys as variables with a custom separator and a custom key format?

   • A) {% for key, value in hash %}
   • B) {% for value in hash %}
   • C) {% for key => value in hash %}
   • D) {% for key, value in hash with keys using separator '.' and format 'key_%s' %}

8. What is the purpose of the |batch filter in Twig?

   • A) To batch an array into smaller arrays
   • B) To batch a hash into smaller hashes
   • C) To batch a string into smaller strings
   • D) To batch a number into smaller numbers

9. How do you create a loop that iterates over a hash and preserves the keys as variables with a custom separator, a custom key format, and a custom value format?

   • A) {% for key, value in hash %}
   • B) {% for value in hash %}
   • C) {% for key => value in hash %}
   • D) {% for key, value in hash with keys using separator '.' and format 'key_%s', value using format 'value_%s' %}

10. What is the purpose of the |map filter in Twig?

    • A) To map an array to a new array based on a callback function
    • B) To map a hash to a new hash based on a callback function
    • C) To map a string to a new string based on a callback function
    • D) To map a number to a new number based on a callback function

Twig 3 Certification Test Answers

Here are the correct answers for the Twig 3 Certification Test questions:

Answers

Basic Concepts

1. A) .twig
2. B) {{ variable }}
3. A) {{ variable|escape }}

Filters

1. D) substring
2. B) Outputs unescaped HTML
3. A) lower

Tests

1. D) All of the above
2. A) {% if variable is defined %}

Control Structures

1. A) {% for item in items %}
2. D) Both B and C

Variables and Expressions

1. A) {% set variable = value %}
2. B) 10

Functions

1. D) All of the above
2. A) include()

Operators

1. B) .
2. D) All of the above

Template Re-use

1. A) {% extends 'parent.twig' %}
2. A) To include a template fragment

Mixed Questions

1. A) 1, 2, 3
2. B) new Twig\Environment()
3. B) To pass variables to included templates
4. A) {% macro name() %}
5. A) {# This is a comment #}
6. D) All of the above
7. A) To extract a substring

Advanced Questions

1. A) {% filter name %}
2. C) HELLO
3. A) {% if variable is empty %}
4. B) To join an array into a string
5. A) {% block outer %}{% block inner %}{% endblock %}{% endblock %}
6. B) 2.5
7. A) {% for key, value in hash %}
8. A) To provide a default value if a variable is undefined or null
9. A) {% if condition1 %}{% if condition2 %}{% endif %}{% endif %}
10. A) To format a string with placeholders

Advanced Questions (continued)

1. A) {% for key, value in hash %}
2. A) To merge two arrays
3. A) {% for key, value in hash %}
4. A) To sort an array in ascending order
5. D) {% for key, value in hash with keys using separator '.' %}
6. B) To reverse an array
7. D) {% for key, value in hash with keys using separator '.' and format 'key_%s', value using format 'value_%s' %}
8. A) To batch an array into smaller arrays
9. D) {% for key, value in hash with keys using separator '.' and format 'key_%s', value using format 'value_%s' %}
10. A) To map an array to a new array based on a callback function

Feel free to review your answers and see how well you understand Twig 3!