Given: 1. class X { 2. private Y y; 3. public X(Y y) { this.y = y; } 4. } 5. class Y { 6. private X x; 7. public Y() { } 8. public Y(X x) { this.x = x; } 9. } The instance variable y is intended to represent the composition relationship "X is composed of Y". Which code correctly maintains this meaning?

A. X x1 = new X(new Y()); X x2 = new X(new Y());

B. X xx = new X(null); Y y1 = new Y(xx); Y y2 = new Y(xx);

C. X x1 = new Y(); X x1 = new Y(yy); X x2 = new Y(xy);

D. Y y1 = new Y(new X(null)); Y y2 = new Y(new X(null));

Oracle

1Z0-850 · Question #32

1Z0-850 Question #32: Real Exam Question with Answer & Explanation

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Question

Given:
class X {
private Y y;
public X(Y y) { this.y = y; }
}
class Y {
private X x;
public Y() { }
public Y(X x) { this.x = x; }
}
The instance variable y is intended to represent the composition relationship "X is composed of Y".
Which code correctly maintains this meaning?

Options

AX x1 = new X(new Y()); X x2 = new X(new Y());
BX xx = new X(null); Y y1 = new Y(xx); Y y2 = new Y(xx);
CX x1 = new Y(); X x1 = new Y(yy); X x2 = new Y(xy);
DY y1 = new Y(new X(null)); Y y2 = new Y(new X(null));

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