Miscellaneous

Question 1

What are the methods defined by Symfony\Component\Asset\PackageInterface?

Answer 1

getVersion(string $path);

getUrl(string $path);

Question 2

What are the methods defined by Symfony\Component\Asset\VersionStrategy\VersionStrategyInterface?

Answer 2

getVersion(string $path);

applyVersion(string $path);

Question 3

What are the default available cache adapters?

Answer 3

APCu Cache Adapter
Array Cache Adapter
Chain Cache Adapter
Couchbase Cache Adapter
Doctrine Cache Adapter
Filesystem Cache Adapter
Memcached Cache Adapter
PDO & Doctrine DBAL Cache Adapter
PHP Array Cache Adapter
PHP Files Cache Adapter
Proxy Cache Adapter
Redis Cache Adapter

Question 4

What methods does Symfony\Contracts\Cache\TagAwareCacheInterface define?

Answer 4

invalidateTags(array $tags);

Question 5

What Symfony Console commands are responsible for removing cache items?

Answer 5

cache: pool:clear
cache: pool:delete
cache: pool:prune

Question 6

What are the methods defined by the Symfony\Component\Config\Loader interface?

Answer 6

load($resource, string $type = null);
supports($resource, string $type = null);
getResolver();
setResolver(LoaderResolverInterface $resolver);

Question 7

What methods does the Symfony\Component\Config\Definition\ConfigurationInterface interface define?

Answer 7

getConfigTreeBuilder();

Question 8

What are possible configuration nodes?

Answer 8

Symfony\Component\Config\Definition\VariableNode
Symfony\Component\Config\Definition\ScalarNode
Symfony\Component\Config\Definition\BooleanNode
Symfony\Component\Config\Definition\IntegerNode
Symfony\Component\Config\Definition\FloatNode
Symfony\Component\Config\Definition\ArrayNode
Symfony\Component\Config\Definition\EnumNode

Question 9

Which of the node builders provide the min() and max() methods for defining constraints?

Answer 9

Symfony\Component\Config\Definition\Builder\IntegerNodeDefinition
Symfony\Component\Config\Definition\Builder\FloatNodeDefinition

Question 10

How do you define allowed values for the enum config node?

Answer 10

By using Symfony\Component\Config\Definition\Builder\EnumNodeDefinition::values() method.

Question 11

What are the possible methods for defining configuration node constraints?

Answer 11

defaultValue()
isRequired()
cannotBeEmpty()
defaultNull()
defaultTrue()
defaultFalse()
treatNullLike($value)
treatTrueLike($value)
treatFalseLike($value)

Question 12

What method should be used to retrieve an instance of Symfony\Component\Config\Definition\Builder\ExprBuilder?

Answer 12

Symfony\Component\Config\Definition\Builder\NodeDefinition::validate()

Question 13

What are the possible rules defined by Symfony\Component\Config\Definition\Builder\ExprBuilder?

Answer 13

ifTrue()
ifString()
ifNull()
ifEmpty() 
ifArray()
ifInArray()
ifNotInArray()
always()

Question 14

What class is used to process the raw configuration data based on the predefined ConfigTree?

Answer 14

Symfony\Component\Config\Definition\Processor

Question 15

What are the available contract packages to use?

Answer 15

symfony/cache-contracts
symfony/event-dispatcher-contracts
symfony/deprecation-contracts
symfony/http-client-contracts
symfony/service-contracts
symfony/translation-contracts

Question 16

What methods does Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface define?

Answer 16

process(ContainerBuilder $container)

Question 17

What methods does Symfony\Component\DependencyInjection\Extension\ExtensionInterface define?

Answer 17

load(array $configs, ContainerBuilder $container);
getNamespace();
getXsdValidationBasePath();
getAlias();

Question 18

What are possible stages at which compiler passes can be launched?

Answer 18

Symfony\Component\DependencyInjection\Compiler\PassConfig::TYPE_BEFORE_OPTIMIZATION
Symfony\Component\DependencyInjection\Compiler\PassConfig::TYPE_OPTIMIZE
Symfony\Component\DependencyInjection\Compiler\PassConfig::TYPE_BEFORE_REMOVING
Symfony\Component\DependencyInjection\Compiler\PassConfig::TYPE_REMOVE
Symfony\Component\DependencyInjection\Compiler\PassConfig::TYPE_AFTER_REMOVING

Question 19

What does AST stand for?

Answer 19

Abstract Syntax Tree

Question 20

What interface defines expression provider?

Answer 20

Symfony\Component\ExpressionLanguage\StringExpressionLanguageProvider

Question 21

What are the escaping rules in expression language?

Answer 21

backslash in a string is escaped by four backslashes
backslash in a regex is escaped by eight backslashes
control symbols (\n, \t, etc.) are escaped by one backslash

Question 22

What is the purpose of the inflector component?

Answer 22

The component converts English nouns from singular to plural form and vice versa.

Question 23

What are the methods defined by Symfony\Component\Lock\PersistingStoreInterface?

Answer 23

save(Key $key);
delete(Key $key);
exists(Key $key);
putOffExpiration(Key $key, float $ttl);

Question 24

What are the methods defined by Symfony\Component\Lock\BlockingStoreInterface?

Answer 24

waitAndSave(Key $key);

Question 25

What does MIME stand for?

Answer 25

Multipurpose Internet Mail Extensions

Question 26

What are the main MIME component classes?

Answer 26

Symfony\Component\Mime\Email | Symfony\Component\Mime\Message

Question 27

What methods does the Symfony\Component\Mime\MimeTypeGuesserInterface define?

Answer 27

isGuesserSupported(): bool | guessMimeType(string $path): ?string

Question 28

What does framework.property_info.enabled config do?

Answer 28

Registers Symfony\Component\PropertyInfo\PropertyInfoExtractor as a service.

Question 29

What are possible tags to tag a newly created information extractor?

Answer 29

``` property_info.list_extractor property_info.type_extractor property_info.description_extractor property_info.access_extractor property_info.initializable_extractor ```

Question 30

What is the difference between serializer encoder and serializer normalizer?

Answer 30

Encoders transform arrays to desired representation format(and vice versa) and normalizers transform objects to arrays(and vice versa).

Question 31

What Symfony versions are considered LTS?

Answer 31

3.4, 4.4, 5.4

Question 32

What internationalization format is recommended by Symfony?

Answer 32

XLIFF

Question 33

How is the Symfony's frontend manager called?

Answer 33

Webpack Encore

Question 34

Which HTTP method's data does Request::$request represent?

Answer 34

POST

Question 35

Which HTTP method's data does Request::$query represent?

Answer 35

GET

Question 36

What are three main routing interfaces?

Answer 36

\Symfony\Component\Routing\RouterInterface \Symfony\Component\Routing\Matcher\UrlMatcherInterface \Symfony\Component\Routing\Generator\UrlGeneratorInterface

Question 37

What are the methods defined by \Symfony\Component\Routing\Matcher\UrlMatcherInterface interface?

Answer 37

match(string $pathinfo);

Question 38

What are the methods defined by \Symfony\Component\Routing\Generator\UrlGeneratorInterface interface?

Answer 38

generate(string $name, array $parameters = [], int $referenceType = self::ABSOLUTE_PATH);

Question 39

What are the available route reference types for generated URLs?

Answer 39

\Symfony\Component\Routing\Generator\UrlGeneratorInterface::ABSOLUTE_URL \Symfony\Component\Routing\Generator\UrlGeneratorInterface::ABSOLUTE_PATH \Symfony\Component\Routing\Generator\UrlGeneratorInterface::RELATIVE_PATH \Symfony\Component\Routing\Generator\UrlGeneratorInterface::NETWORK_PATH

Question 40

What are the methods defined by Symfony\Component\HttpKernel\Controller\ControllerResolverInterface interface?

Answer 40

getController(Request $request);

Question 41

What does ESI stand for?

Answer 41

Edge Side Includes

Question 42

What is Homestead?

Answer 42

Vagrant box for running Symfony applications

Question 43

How many years pass between major Symfony versions?

Answer 43

2

Question 44

What does CGI stand for?

Answer 44

Common Gateway Interface

Question 45

Where can you find Symfony Flex recipies?

Answer 45

https://flex.symfony.com

Question 46

What is symfony.lock file responsible for?

Answer 46

Keeping track of installed Flex recipies

Question 47

Why would you use Request::setTrustedProxies() method?

Answer 47

To configure Symfony to support reverse proxies

Question 48

What should be the type value in Symfony bundle composer.json file?

Answer 48

symfony-bundle

Question 49

What command can be used to dump default configuration values of a bundle?

Answer 49

config:dump-reference