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单选题
Given: When the doSomething method is called, after which line does the Object created in line 5 become available for garbage collection?()
A

Line 5

B

Line 6

C

Line 7

D

Line 8

E

Line 9

F

Line 10


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考题 单选题Given: Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection?()A Line 16B Line 17C Line 18D Line 19

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考题 单选题1. public class GC {  2. private Object o;  3. private void doSomethingElse(Object obj) { o = obj; }  4. public void doSomething() {  5. Object o = new Object();  6. doSomethingElse(o);  7. o = new Object();  8. doSomethingElse(null);  9.o=null;  10. }  11. }  When the doSomething method is called, after which line does the Object created in line 5 become available for garbage collection?()A  Line 5B  Line 6C  Line 7D  Line 8E  Line 9F  Line 10

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考题 单选题Given: When the doSomething method is called, after which line does the Object created in line 5 become available for garbage collection?()A Line 5B Line 6C Line 7D Line 8E Line 9F Line 10

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考题 单选题Which is the earliest line in the following code after which the object created on the line marked (0) will be a candidate for being garbage collected, assuming no compiler optimizations are done? ()  public class Q76a9 {   static String f() {   String a = "hello";   String b = "bye"; // (0)   String c = b + "!"; // (1)   String d = b;  b = a; // (2)   d = a; // (3)   return c; // (4)  }   public static void main(String args[]) {   String msg = f();   System.out.println(msg); // (5)   }   }A The line marked (1).B The line marked (2).C The line marked (3).D The line marked (4).E The line marked (5).

考题 单选题public class X {   public object m () {   object o = new float (3.14F);   object oa = new object [1];   oa[0]= o;   o = null;   oa[0] = null;   return o;   }   }   When is the float object created in line 3, eligible for garbage collection?()A  Just after line 5.B  Just after line 6.C  Just after line 7.D  Just after line 8(that is, as the method returns).

考题 单选题1. public class X {  2. public object m ()  {  3. object o = new float (3.14F);  4. object [] oa = new object [1]; 5. oa[0]= o;  6. o = null;  7. oa[0] = null;  10. return o;  9. }  10. }  When is the float object created in line 3, eligible for garbage collection?()A  Just after line 5.B  Just after line 6.C  Just after line 7.D  Just after line 8(that is, as the method returns).

考题 单选题public class X {  public object m () {   object o = new float (3.14F);   object oa = new object [1];   oa[0]= o;   o = null;   return oa[0];   }   }   When is the float object created in line 3, eligible for garbage collection?()A  Just after line 5B  Just after line 6C  Just after line 7 (that is, as the method returns)D  Never in this method.

考题 单选题12. void start() {  13. A a = new A();  14. B b = new B();  15. a.s(b);  16. b = null;  17. a = null;  18. System.out.println(“start completed”); 19. }  When is the B object, created in line 14, eligible for garbage collection?()A  After line 16.B  After line 17.C  After line 18 (when the methods ends).D  There is no way to be absolutely certain.E  The object is NOT eligible for garbage collection.

考题 单选题1. public class X (  2. public object m ()  {  3. object o = new float (3.14F);  4. object [] oa = new object [1];  5. oa[0]= o;  6. o = null;  7. return oa[0];  8. }  9. }   When is the float object created in line 3, eligible for garbage collection?()A  Just after line 5B  Just after line 6C  Just after line 7 (that is, as the method returns)D  Never in this method.