void start() { A a = new A(); B b = new B(); a.s(b); b = null; /* Line 5 / a = null; / Line 6 / System.out.println("start completed"); / Line 7 */ } When is the B object, created in line 3, eligible for garbage collection?

void start() {
A a = new A();
B b = new B();
a.s(b);
b = null; /* Line 5 */
a = null; /* Line 6 */
System.out.println("start completed"); /* Line 7 */
}

When is the B object, created in line 3, eligible for garbage collection?

[A].	after line 5
[B].	after line 6
[C].	after line 7
[D].	There is no way to be absolutely certain.

Answer: Option D

Explanation:

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void start() { A a = new A(); B b = new B(); a.s(b); b = null; /* Line 5 / a = null; / Line 6 / System.out.println("start completed"); / Line 7 */ } When is the B object, created in line 3, eligible for garbage collection?

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void start() { A a = new A(); B b = new B(); a.s(b); b = null; /* Line 5 */ a = null; /* Line 6 */ System.out.println("start completed"); /* Line 7 */ } When is the B object, created in line 3, eligible for garbage collection?

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void start() { A a = new A(); B b = new B(); a.s(b); b = null; /* Line 5 / a = null; / Line 6 / System.out.println("start completed"); / Line 7 */ } When is the B object, created in line 3, eligible for garbage collection?