Frequent question: When an object is eligible for garbage collection in Java?

An object is eligible for garbage collection when there are no more references to that object. References that are held in a variable are usually dropped when the variable goes out of scope. Or, you can explicitly drop an object reference by setting the variable to the special value null.

Which objects are available for garbage collection in Java?

What are Garbage Collection Roots in Java?

  • Classes loaded by system class loader (not custom class loaders)
  • Live threads.
  • Local variables and parameters of the currently executing methods.
  • Local variables and parameters of JNI methods.
  • Global JNI reference.
  • Objects used as a monitor for synchronization.

How many objects are eligible for garbage collection in Java?

as per the answer given for this question, there is no object eligible for GC at line 11; but according to me at least one object, t2, which is set to point null at line 6, should be eligible for garbage collection.

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What are the ways to make objects eligible for garbage collection?

An object can be made eligible for garbage collection by making sure there are no references pointing to that object. You cannot directly invoke the garbage collector. You can suggest the JVM to perform garbage collection by calling System.

How many objects will be eligible for garbage collection after the execution of the below code?

Explanation : After execution of line 12, t1 becomes eligible for garbage collection.

Which of the given objects are eligible for garbage collection after line 14?

Option B is correct. All references to the Bar object created on line 6 are destroyed when a new reference to a new Bar object is assigned to the variable newBar on line 14. Therefore the Bar object, created on line 6, is eligible for garbage collection after line 14.

How many objects are eligible for garbage collection immediately after line 1?

How many objects are eligible for garbage collection after execution of line ? Explanation: Since t1 and t2 are local objects of m1() method, so they become eligible for garbage collection after complete execution of method unless any of them is returned. 13.

How many objects eligible or GC is reached how many objects are eligible for garbage collection?

How many objects are eligible for garbage collections? According to Kathy Sierra’s answer, it is C . That means two objects are eligible for garbage collection.

How many objects are eligible for garbage collection after execution of line 5?

Two objects are eligible 5) . The number of objects eligible for GC is two.

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Can you force garbage collection in Java?

If you want to force garbage collection you can use the System object from the java. lang package and its gc() method or the Runtime. … In general, using the System. gc() is considered a bad practice and we should tune the work of the garbage collector instead of calling it explicitly.

How many objects are eligible for garbage collections?

All the three objects internally references each other but there is no external reference which makes the three objects eligible for garbage collection.

How many of the String objects are eligible for garbage collection right before the end of the main method?

How many of the String objects are eligible for garbage collection right before the end of the main method? Explanation: All three references point to the String apple. This makes the other two String objects eligible for garbage collection.

What is garbage collector in Java Mcq?

Q) Garbage collection in Java is

Unused package in a program automatically gets deleted. Memory occupied by objects with no reference is automatically reclaimed for deletion. Java deletes all unused java files on the system.

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