98 questions for “OOP & Classes”

Found in 1 field. Select a question to see its full answer.

Matching topics

Java Interfaces & Abstract Classes 10 Java Inner Classes & Anonymous Classes 9 PHP Interfaces & Abstract Classes 6 C# Interfaces & Abstract Classes 5 PHP OOP 4 Python Dataclasses & NamedTuples 1

Information Technology

98 questions in 6 technologies

#	Question	Technology	Topic	Level
1	How would you use an abstract class to implement the Template Method pattern, defining a fixed algorithm skeleton with some steps left abstract for subclasses to fill in? Java › Interfaces & Abstract Classes	Java	Interfaces & Abstract Classes	Intermediate
2	Can an interface extend multiple other interfaces simultaneously, and how does this differ from a class's single-inheritance restriction for abstract/concrete classes? Java › Interfaces & Abstract Classes	Java	Interfaces & Abstract Classes	Intermediate
3	How do local classes (defined within a method body) and anonymous classes differ in their capabilities and use cases, particularly regarding capturing local variables and reusability? Java › Inner Classes & Anonymous Classes	Java	Inner Classes & Anonymous Classes	Advanced
4	How does the compiler implement inner classes at the bytecode level, and what synthetic elements (like a hidden outer-class reference field and synthetic accessor methods) does it generate to make this work? Java › Inner Classes & Anonymous Classes	Java	Inner Classes & Anonymous Classes	Advanced
5	How would you use an anonymous class to create a one-off subclass with a customized implementation, distinct from anonymous classes implementing an interface, and what specific syntax quirk applies? Java › Inner Classes & Anonymous Classes	Java	Inner Classes & Anonymous Classes	Advanced
6	What is an interface in PHP, and what purpose does it serve in defining a contract for classes to follow? PHP › Interfaces & Abstract Classes	PHP	Interfaces & Abstract Classes	Beginner
7	How do you decide whether to use an interface or an abstract class when designing a set of related classes that share common behavior? PHP › Interfaces & Abstract Classes	PHP	Interfaces & Abstract Classes	Intermediate
8	How does PHP's type system use interfaces to enable polymorphism, allowing different concrete classes to be used interchangeably wherever the interface type is expected? PHP › Interfaces & Abstract Classes	PHP	Interfaces & Abstract Classes	Intermediate
9	How does the 'sealed' modifier interact with abstract classes and interface method overrides to control further extensibility? C# › Interfaces & Abstract Classes	C#	Interfaces & Abstract Classes	Advanced
10	How would you implement inheritance between dataclasses, and what field-ordering rule must be respected across the hierarchy? Python › Dataclasses & NamedTuples	Python	Dataclasses & NamedTuples	Advanced

Show all 98 questions in Information Technology