When is the Demo object eligible for garbage collection? class Test
{
private Demo d;
void start()
{
d = new Demo();
this.takeDemo(d); /* Line 7 */
} /* Line 8 */
void takeDemo(Demo demo)
{ …

Question

When is the Demo object eligible for garbage collection? class Test 
{  
    private Demo d; 
    void start() 
    {  
        d = new Demo(); 
        this.takeDemo(d); /* Line 7 */
    } /* Line 8 */
    void takeDemo(Demo demo) 
    { …

Accepted Answer

Option D is correct. By a process of elimination.

Option A is wrong. The variable d is a member of the Test class and is never directly set to null.

Option B is wrong. A copy of the variable d is set to…

When is the Demo object eligible for garbage collection? class Test { private Demo d; void start() { d = new Demo(); this.takeDemo(d); /* Line 7 / } / Line 8 */ void takeDemo(Demo demo) { demo = null; demo = new Demo(); } }

Discussion & Comments

When is the Demo object eligible for garbage collection? class Test { private Demo d; void start() { d = new Demo(); this.takeDemo(d); /* Line 7 */ } /* Line 8 */ void takeDemo(Demo demo) { demo = null; demo = new Demo(); } }

Discussion & Comments

When is the Demo object eligible for garbage collection? class Test { private Demo d; void start() { d = new Demo(); this.takeDemo(d); /* Line 7 / } / Line 8 */ void takeDemo(Demo demo) { demo = null; demo = new Demo(); } }