| Title | Topics | Action | |||
|---|---|---|---|---|---|
| 641 | Override a Virtual MethodThe base class `Animal` has a `virtual` method `Speak`. Override it in the `Dog`... | easy | ○ Not Started | Polymorphism | Solve |
| 642 | Two Overloaded Print MethodsThe `Printer` class already has a `Print(int)` method. Add a second `Print` meth... | easy | ○ Not Started | Polymorphism | Solve |
| 643 | Overload Add By ArityThe `Calculator` class has an `Add` method that sums two `int` values. Add an ov... | easy | ○ Not Started | Polymorphism | Solve |
| 644 | ToString Override for PointOverride the `ToString` method on the `Point` class so printing a point shows it... | easy | ○ Not Started | Polymorphism | Solve |
| 645 | Implement an Abstract MethodThe `abstract` class `Shape` declares an abstract method `Area` with no body. Pr... | easy | ○ Not Started | Polymorphism | Solve |
| 646 | Implement an InterfaceThe interface `IGreeter` declares a method `Greet` that returns a `string`. Make... | easy | ○ Not Started | Polymorphism | Solve |
| 647 | Virtual Property OverrideThe base class `Employee` has a `virtual` read-only property `Role` that returns... | easy | ○ Not Started | Polymorphism | Solve |
| 648 | Call Base Method in OverrideThe base class `Logger` has a `virtual` method `Log` that prints `Base log`. Ove... | easy | ○ Not Started | Polymorphism | Solve |
| 649 | Sealed OverrideThe base class `Widget` has a `virtual` method `Draw`. In the `Button` class, pr... | easy | ○ Not Started | Polymorphism | Solve |
| 650 | Overload By Parameter TypeThe `Formatter` class has a `Show(int)` method. Add an overload `Show(double)` s... | easy | ○ Not Started | Polymorphism | Solve |
| 651 | Interface PropertyThe interface `IProduct` declares a read-only `Name` property. Make the `Book` c... | easy | ○ Not Started | Polymorphism | Solve |
| 652 | Polymorphic Method ParameterThe `Speaker` class has a method `Announce(Animal a)`. Because the parameter typ... | easy | ○ Not Started | Polymorphism | Solve |
| 653 | Abstract Property ImplementThe `abstract` class `Animal` declares an abstract read-only property `Sound`. I... | easy | ○ Not Started | Polymorphism | Solve |
| 666 | Override a Calculated ResultThe base class `Shape` has a `virtual` method `Area()` that returns `0`. Overrid... | easy | ○ Not Started | Polymorphism | Solve |
| 667 | Extend the Base Method with baseThe base class `Greeter` has a `virtual` method `Greet()` that returns `Hello`. ... | easy | ○ Not Started | Polymorphism | Solve |
| 668 | Overload a Method by Argument CountMethod overloading (compile-time polymorphism) lets one method name have several... | easy | ○ Not Started | Polymorphism | Solve |
| 669 | Overload a Method by Parameter TypeOverloads can also differ by parameter type. The `Printer` class already has `De... | easy | ○ Not Started | Polymorphism | Solve |
| 670 | Polymorphic ToString`Console.WriteLine` on an object calls that object's `ToString()`, and the objec... | easy | ○ Not Started | Polymorphism | Solve |
| 671 | Implement an Interface MethodAn interface lists methods a class promises to provide. The `IShape` interface d... | easy | ○ Not Started | Polymorphism | Solve |
| 672 | Override a Virtual PropertyProperties can be `virtual` and overridden just like methods. The `Vehicle` clas... | easy | ○ Not Started | Polymorphism | Solve |
| 673 | One Method, Many AnimalsA method that takes a base-class parameter can accept ANY derived object. The `A... | easy | ○ Not Started | Polymorphism | Solve |
| 674 | Override a Void MethodOverriding also works for methods that return nothing. The `Logger` class has a ... | easy | ○ Not Started | Polymorphism | Solve |
| 675 | Implement an Abstract PropertyAbstract classes can declare abstract properties that each derived class must fi... | easy | ○ Not Started | Polymorphism | Solve |
| 782 | Override Equals for Value EqualityOverride the inherited `Equals(object? obj)` method on `Point` so two points are... | easy | ○ Not Started | Polymorphism | Solve |
| 783 | Chain to the Base Constructor`Vehicle` has a constructor that takes a `make` and stores it in `Make`. Complet... | easy | ○ Not Started | Polymorphism | Solve |
| 654 | Polymorphic List TotalComplete `AreaCalculator.TotalArea` so it returns the sum of `Area()` for every ... | medium | ○ Not Started | Polymorphism | Solve |
| 655 | Operator OverloadingOverload the `+` operator on the `Vector` class so adding two vectors adds their... | medium | ○ Not Started | Polymorphism | Solve |
| 656 | Iterate Interface ImplementersThe interface `IShape` is implemented by `Circle` and `Triangle`, each returning... | medium | ○ Not Started | Polymorphism | Solve |
| 657 | Classify By Runtime TypeComplete `Classifier.Classify` so it returns `Dog`, `Cat`, or `Unknown` dependin... | medium | ○ Not Started | Polymorphism | Solve |
| 658 | Generic Max MethodComplete the generic method `Max<T>` so it returns the larger of two values of A... | medium | ○ Not Started | Polymorphism | Solve |
| 659 | Implement Two InterfacesA class can implement more than one interface. Make `Duck` implement BOTH `IWalk... | medium | ○ Not Started | Polymorphism | Solve |
| 660 | Abstract Template MethodThe `abstract` class `Shape` has a concrete `Report()` method that combines two ... | medium | ○ Not Started | Polymorphism | Solve |
| 661 | Implement IComparableMake `Person` implement `IComparable<Person>` by ordering people by `Age` ascend... | medium | ○ Not Started | Polymorphism | Solve |
| 676 | Loop Over a Base-Type ArrayThe abstract class `Animal` declares `abstract string Sound()`. Create a `Dog` c... | medium | ○ Not Started | Polymorphism | Solve |
| 677 | Hide a Method with newThe `new` keyword HIDES an inherited method instead of overriding it. With hidin... | medium | ○ Not Started | Polymorphism | Solve |
| 678 | Safe Downcast with Pattern MatchingSometimes you must check an object's real type before using a method only the de... | medium | ○ Not Started | Polymorphism | Solve |
| 679 | Sum Areas Through an InterfaceThe `IShape` interface declares `int Area()`. Create a `Rectangle` class (constr... | medium | ○ Not Started | Polymorphism | Solve |
| 680 | Template Method Calls a VirtualA non-virtual base method can call a `virtual` method, and overriding that virtu... | medium | ○ Not Started | Polymorphism | Solve |
| 681 | Chained Overrides Across Three LevelsOverrides can build on each other level by level using `base`. `A.Name()` return... | medium | ○ Not Started | Polymorphism | Solve |
| 682 | Program to an InterfaceA method that accepts an interface type works with any class that implements it.... | medium | ○ Not Started | Polymorphism | Solve |
| 683 | Polymorphic Factory From InputA factory method can return different subclasses through the same base type, cho... | medium | ○ Not Started | Polymorphism | Solve |
| 784 | Default Interface MethodGive the `IGreeter` interface a default method `Greet()` that returns the text `... | medium | ○ Not Started | Polymorphism | Solve |
| 662 | Build a Shape HierarchyBuild a polymorphic shape hierarchy from scratch. Define an `abstract` class `Sh... | hard | ○ Not Started | Polymorphism | Solve |
| 663 | Discount StrategiesBuild an interface-based strategy from scratch. Define an interface `IDiscount` ... | hard | ○ Not Started | Polymorphism | Solve |
| 664 | Money With Operator PlusBuild a `Money` class that supports the `+` operator. It stores whole `Dollars` ... | hard | ○ Not Started | Polymorphism | Solve |
| 665 | Polymorphic PayrollBuild a payroll hierarchy from scratch. Define an `abstract` class `Employee` wi... | hard | ○ Not Started | Polymorphism | Solve |
| 684 | Explicit Interface ImplementationWhen two interfaces declare a method with the SAME name, a class can implement e... | hard | ○ Not Started | Polymorphism | Solve |
| 685 | Generic Method (Parametric Polymorphism)Generics let one method work with ANY type. Write a generic method `Identity<T>`... | hard | ○ Not Started | Polymorphism | Solve |
| 686 | Generic Container ClassA generic class is a single class definition that adapts to whatever type you pl... | hard | ○ Not Started | Polymorphism | Solve |
| 785 | Covariant Return Type Override`Animal` declares a virtual `Clone()` that returns an `Animal`, and a virtual `S... | hard | ○ Not Started | Polymorphism | Solve |