Multiple Choice

1. What do you lose when you add a constructor to a class?

   • The copy constructor that was generated automatically by Java

   • The default constructor that was generated automatically by Java

   • The basic constructor that was generated automatically by Java

   • The public constructor that was generated automatically by Java

2. What is the most correct description of a constructor?

   • A method that creates and initializes objects into a valid state

   • A method that creates objects and makes all methods accessible

   • A method that creates objects and gives it a name

   • A method that creates a class and allows you to make multiple objects

3. How do we call the constructor depicted in the code snippet below?

    public class Point {
      private double x;
      private double y;
   
      // ...
   
      public Point(Point original) {
        this(original.x, original.y);
      }
    }

   • A copy constructor

   • A default constructor

   • A basic constructor

   • A public constructor

4. Which code block contains a default constructor?

    // Code block A
    class Foo {
      public Bar() {
        // ...
      }
    }

    // Code block B
    class Bar {
      public Bar(int x) {
        // ...
      }
    }

    // Code block C
    class Bar {
      public Foo(int x) {
        // ...
      }
    }

    // Code block D
    class Bar {
      public Bar() {
        // ...
      }
    }

   • Code block A

   • Code block B

   • Code block C

   • Code block D