27 questions for “Type Declarations & Strict Types”

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PHP Type Declarations & Strict Types 7 PHP Basics & Types 4

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27 questions in 1 technology

#	Question	Technology	Topic	Level
1	What does declaring strict_types=1 at the top of a PHP file actually change about how type declarations are enforced? PHP › Type Declarations & Strict Types	PHP	Type Declarations & Strict Types	Beginner
2	What are type declarations in PHP, and how do they let you specify what kind of value a function parameter or return value should be? PHP › Type Declarations & Strict Types	PHP	Type Declarations & Strict Types	Beginner
3	What are nullable types and union types in PHP, and how do they let you express that a value could be one of several different possible types? PHP › Type Declarations & Strict Types	PHP	Type Declarations & Strict Types	Intermediate
4	How do type declarations improve the effectiveness of static analysis tools and IDE autocompletion when working within a codebase? PHP › Type Declarations & Strict Types	PHP	Type Declarations & Strict Types	Intermediate
5	How does PHP's type variance, specifically covariance and contravariance, affect how return types and parameter types can be safely changed when overriding a method in a child class? PHP › Type Declarations & Strict Types	PHP	Type Declarations & Strict Types	Advanced
6	What are PHP 8's enums, and how do they provide a more type safe alternative to using plain class constants for representing a fixed set of related values? PHP › Type Declarations & Strict Types	PHP	Type Declarations & Strict Types	Advanced
7	What are readonly properties in PHP, and how do they help you create objects whose internal state cannot be accidentally changed after they are first constructed? PHP › Type Declarations & Strict Types	PHP	Type Declarations & Strict Types	Intermediate
8	How does PHP's type coercion behave differently in strict types mode compared to the default coercive mode, and what are the implications for function argument and return type validation? PHP › Basics & Types	PHP	Basics & Types	Advanced
9	What are the basic data types available in PHP? PHP › Basics & Types	PHP	Basics & Types	Beginner
10	What is type juggling in PHP, and how does it affect comparisons between values of different types? PHP › Basics & Types	PHP	Basics & Types	Intermediate

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