Symfony Components Quiz

Question 1

Question

What functions can you call on an instance of \Symfony\Component\ClassLoader\ClassLoader, apart from the register() function?

Answer

$loader->addPrefix('Twig_', __DIR__.'/vendor/twig/twig/lib');
$loader->setUseIncludePath(true);
$loader->addPrefixes(array( 'Symfony' => __DIR__.'/../vendor/symfony/symfony/src', 'Monolog' => __DIR__.'/../vendor/monolog/monolog/src', ));
$loader->mapClass(Twig_', __DIR__.'/vendor/twig/twig/lib');

Question 2

Question

What classes allow you to cache the mapping from a class to its containing file?

Answer

ApcClassLoader
AppClassLoader
XDebugClassLoader
XcacheClassLoader

Question 3

Question

How can you instantiate an ApcClassLoader?

Answer

new ApcClassLoader($loader, sha1(__FILE__));
new ApcClassLoader($loader);
new ApcClassLoader(sha1(__FILE__), $loader);
new ApcClassLoader('../app/cache', $loader);

Question 4

Question

Two class loaders can co-exist in the application?

Answer

True
False

Question 5

Question

How many classes does the class loader component have?

Answer

Less than 10
About 20
More than 40

Question 6

Question

you can define a new file loader in Symfony, if the new loader class :

Answer

is registered in yml as a service with the config.file_loader tag
is registered with the DelagatingLoader
implements the LoaderInterface
extends the abstract FileLoader class

Question 7

Question

You should merge all your configuration files into one and use it as cache.

Answer

True
False

Question 8

Question

What class in the Config Component helps you manage and check if the generate cache file containing all the configuration is valid and if not regenerate it?

Answer

CacheConfig
ConfigurationCache
ConfigLoaderCache
ConfigCache

Question 9

Question

In the context of a TreeBuilder, which of the following are valid node types?

Answer

string
scalar
array
enum
serviceId
integer
boolean
float
parameter
variable

Question 10

Question

Which of the following are valid ways to define a scalar node type? (to replace .... below) $treeBuilder ->children() ..... ->end();

Answer

->node('name', 'scalar')
->scalarNode('name')
->addScalarNode('name')
->nodeName('scalar')

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Symfony Components Quiz

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	Created by Alexandra Negrea almost 9 years ago