Twig 3 Certification Test 5

Instructions

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

Questions

Basic Concepts

1. What is the purpose of the |raw filter in Twig?

   • A) To remove all HTML tags from a string
   • B) To escape HTML characters
   • C) To output unescaped HTML
   • D) To convert a string to uppercase

2. How do you define a variable in Twig?

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

3. What is the purpose of the |format filter?

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

Filters

1. Which filter would you use to convert a string to lowercase?

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

2. What does the |split filter do?

   • A) Splits a string into an array based on a delimiter
   • B) Splits an array into smaller arrays
   • C) Splits a hash into smaller hashes
   • D) None of the above

3. How do you apply multiple filters to a variable using the pipe syntax?

   • A) {{ variable|filter1|filter2|filter3 }}
   • B) {{ filter1(filter2(filter3(variable))) }}
   • C) {{ variable|filter1(filter2(filter3)) }}
   • D) {{ variable|filter1(variable|filter2(variable|filter3)) }}

Tests

1. What test can be used to check if a variable is an array?

   • A) is_array
   • B) array
   • C) is iterable
   • D) is defined

2. How do you combine multiple tests in a single condition using the pipe syntax?

   • A) {% if variable is defined and variable is not null %}
   • B) {% if variable is defined or variable is not null %}
   • C) {% if variable is defined & variable is not null %}
   • D) {% if variable is defined | variable is not null %}

Control Structures

1. What is the correct syntax for a for 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

2. 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 %}

Variables and Expressions

1. What is the output of {{ variable is defined ? 'Yes' : 'No' }} if variable is defined?

   • A) Yes
   • B) No
   • C) Error
   • D) null

2. How do you access a property of an object in Twig?

   • A) {{ object.property }}
   • B) {{ object->property }}
   • C) {{ object[property] }}
   • D) Both A and C

Functions

1. Which function is used to get the current timestamp in Twig?

   • A) date()
   • B) now()
   • C) time()
   • D) timestamp()

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

   • A) To include a template
   • B) To embed a template
   • C) To extend a template
   • D) To import a template

Operators

1. What does the starts with operator do in Twig?

   • A) Checks if a string starts with a specific substring
   • B) Checks if a hash starts with a specific key
   • C) Checks if an array starts with a specific element
   • D) None of the above

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

   • A) and
   • B) or
   • C) not
   • D) All of the above

Template Re-use

1. What is the purpose of the extends tag in Twig?

   • A) To include a template
   • B) To define a base template
   • C) To create a macro
   • D) To define a block

2. How do you import a macro from another template in Twig?

   • A) {% include 'template.twig' %}
   • B) {% embed 'template.twig' %}
   • C) {% import 'template.twig' as macros %}
   • D) {% extend 'template.twig' %}

Mixed Questions

1. What is the output of {{ 'Hello World'|replace({'Hello': 'Hi'}) }} if the input is Hello World?

   • A) Hello World
   • B) Hi World
   • C) Hello
   • D) Hi

2. How do you create a conditional statement that checks if a variable is an array using the is operator?

   • A) {% if variable is iterable %}
   • B) {% if variable is array %}
   • C) {% if variable is defined and variable is not null %}
   • D) All of the above

3. Which of the following is a valid way to define a macro with arguments in Twig?

   • A) {% macro name(arg1, arg2) %}
   • B) {% define macro name(arg1, arg2) %}
   • C) {% function name(arg1, arg2) %}
   • D) {% template name(arg1, arg2) %}

4. What does the |date filter do with the 'Y-m-d' format?

   • A) Formats a date string in the YYYY-MM-DD format
   • B) Converts a string to a date object
   • C) Returns the current date in the YYYY-MM-DD format
   • D) None of the above

5. How do you create a loop that iterates over a range of numbers with a custom step size in Twig?

   • A) {% for i in 1..10 step 2 %}
   • B) {% for i from 1 to 10 step 2 %}
   • C) {% for i in range(1, 10, 2) %}
   • D) All of the above

6. 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) To join two hashes

7. What does the |slice filter do with a single argument?

   • A) Extracts a substring from the beginning of a string
   • B) Returns a portion of an array starting from a specific index
   • C) Both A and B
   • D) None of the above

Advanced Questions

1. How do you check if a string contains a specific substring using the matches test in Twig?

   • A) {% if 'string' matches '/substring/' %}
   • B) {% if 'string' matches 'substring' %}
   • C) {% if 'string' matches ['substring'] %}
   • D) {% if 'string' matches 'substring' ignorecase %}

2. What is the output of {{ [1, 2, 3]|reverse }}?

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

3. Which of the following is a valid way to create a nested block with a parent block name in Twig?

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

4. How do you create a custom filter in Twig using the pipe syntax?

   • A) {{ 'string'|myfilter }}
   • B) {{ myfilter('string') }}
   • C) {{ 'string'|myfilter('arg') }}
   • D) Both A and C

5. What is the purpose of the |default filter?

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

6. What is the output of {{ 'Twig'|length }}?

   • A) 4
   • B) 3
   • C) 5
   • D) Error

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

   • 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 %}

8. What does the |merge filter do with arrays?

   • A) Merges two arrays into a single array
   • B) Merges two hashes into a single hash
   • C) Merges two strings into a single string
   • D) None of the above

9. What is the purpose of the |reverse filter?

   • A) To reverse a string
   • B) To reverse an array
   • C) To reverse a hash
   • D) All of the above

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

    • 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 %}

11. What is the output of {{ 'Hello World'|slice(6, 5) }}?

    • A) Hello
    • B) World
    • C) Hello World
    • D) Error

12. How do you create a conditional statement that checks if a variable is an object using the is operator?

    • A) {% if variable is iterable %}
    • B) {% if variable is object %}
    • C) {% if variable is defined and variable is not null %}
    • D) All of the above

13. What is the purpose of the |sort filter?

    • A) To sort an array in ascending order
    • B) To sort a hash by keys
    • C) To sort a hash by values
    • D) All of the above

14. How do you create a loop that iterates over an array in reverse order using the |reverse filter?

    • A) {% for item in array|reverse %}
    • B) {% for item in reverse(array) %}
    • C) {% for item in array|sort('desc') %}
    • D) Both A and B

15. What does the |batch filter do?

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

16. What is the output of {{ 10 / 3 }}?

    • A) 3
    • B) 3.33
    • C) 3.3333333333
    • D) Error

17. What is the purpose of the |first filter?

    • A) To get the first element of an array
    • B) To get the first character of a string
    • C) To get the first key of a hash
    • D) All of the above

18. How do you create a loop that iterates over an array and skips every second element using the |batch filter with a step size?

    • A) {% for item in array|slice(2) %}
    • B) {% for item in array|batch(2, true) %}
    • C) {% for item in array|slice(0, 2) %}
    • D) {% for item in array|slice(1, 2) %}

19. What is the purpose of the |abs filter?

    • A) To get the absolute value of a number
    • B) To format a date
    • C) To format a number
    • D) To format a boolean

20. What is the output of {{ 'twig'|capitalize }}?

    • A) Twig
    • B) TWIG
    • C) twig
    • D) Error

Answers

Basic Concepts

1. C) To output unescaped HTML
2. A) {% set variable = value %}
3. A) To format a string with placeholders

Filters

1. A) lower
2. A) Splits a string into an array based on a delimiter
3. A) {{ variable|filter1|filter2|filter3 }}

Tests

1. C) is iterable
2. D) {% if variable is defined | variable is not null %}

Control Structures

1. D) All of the above
2. A) {% if condition1 %}{% if condition2 %}{% endif %}{% endif %}

Variables and Expressions

1. A) Yes
2. D) Both A and C

Functions

1. C) time()
2. A) To include a template

Operators

1. A) Checks if a string starts with a specific substring
2. D) All of the above

Template Re-use

1. B) To define a base template
2. C) {% import 'template.twig' as macros %}

Mixed Questions

1. B) Hi World
2. D) All of the above
3. A) {% macro name(arg1, arg2) %}
4. A) Formats a date string in the YYYY-MM-DD format
5. D) All of the above
6. B) To join an array into a string
7. C) Both A and B

Advanced Questions

1. A) {% if 'string' matches '/substring/' %}
2. B) [3, 2, 1]
3. A) {% block outer %}{% block inner %}{% endblock %}{% endblock %}
4. D) Both A and C
5. A) To provide a default value if a variable is undefined
6. A) 4
7. D) {% for key, value in hash with keys %} 33