Given the following abstract class Shape: ``java public abstract class Shape { private int x; private int y; public abstract void draw(); public void setAnchor(int x, int y) { this.x = x; this.y =…

Question

public abstract class Shape {
 private int x;
 private int y;
 public abstract void draw();
 public void setAnchor(int x, int y) {
 this.x = x;
 this.y = y;
 }
}

Options

• Apublic abstract class Circle implements Shape { Private int radius; }
• Bpublic abstract class Circle extends Shape { Private int radius; }
• Cpublic class Circle extends Shape { Private int radius; public void draw(); }
• Dpublic abstract class Circle implements Shape { private int radius; public void draw(); }
• Epublic class Circle extends Shape { Private int radius; public void draw() { /* code here */ } }
• Fpublic abstract class Circle implements Shape { private int radius; public void draw() { /* code here */ } }

• A
  3% (1)
• B
  72% (21)
• C
  14% (4)
• D
  3% (1)
• F
  7% (2)

Explanation

B and E are correct because Shape is an abstract class, not an interface - this means subclasses must use extends, not implements. Option B is valid because a class declared abstract is not required to implement inherited abstract methods (it defers that responsibility to its own subclasses). Option E is valid because it's a concrete class that properly implements draw() with a method body, satisfying the contract imposed by the abstract parent.

Why the distractors fail:

• A, D, F - all use implements Shape, which is illegal; you implement interfaces and extend classes. Since Shape is an abstract class, this is a compile-time error.
• C - writes public void draw(); with no body in a concrete class. A method signature without a body is only legal in an interface or when explicitly marked abstract. A concrete class extending an abstract parent must provide a full implementation.

Memory tip: "Classes extend, interfaces implement." When you see abstract class in the question, immediately cross out every answer that says implements - you've already eliminated half the wrong choices.

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