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What is garbage collection Why is it useful when might it be a problem?
Garbage Collection is a form of automatic memory management. It is a special case of resource management, in which the limited resource being managed is memory. Benefits for the programmer is that garbage collection frees the programmer from manually dealing with memory allocation and deallocation.
Why do you think garbage collector are important?
It is the task of garbage collection (GC) in the Java virtual machine (JVM) to automatically determine what memory is no longer being used by a Java application and to recycle this memory for other uses. Because unreferenced objects are automatically removed from the heap memory, GC makes Java memory-efficient.
What do you mean by garbage collection?
In computer science, garbage collection (GC) is a form of automatic memory management. The garbage collector attempts to reclaim memory which was allocated by the program, but is no longer referenced—also called garbage.
Why does Java not have a garbage collector?
Due to this negligence, at certain point, for creation of new objects, sufficient memory may not be available and entire program will terminate abnormally causing OutOfMemoryErrors. But in Java, the programmer need not to care for all those objects which are no longer in use. Garbage collector destroys these objects.
What are the factors that affect garbage collection?
The two most important factors affecting garbage collection performance are total available memory and proportion of the heap dedicated to the young generation. The most important factor affecting garbage collection performance is total available memory.
When is an object eligible for garbage collection?
Eligibility for garbage collection : An object is said to be eligible for GC (garbage collection) iff it is unreachable. In above image, after i = null; integer object 4 in heap area is eligible for garbage collection.
Who is responsible for garbage collection in C + +?
In C/C++, programmer is responsible for both creation and destruction of objects. Usually programmer neglects destruction of useless objects. Due to this negligence, at certain point, for creation of new objects, sufficient memory may not be available and entire program will terminate abnormally causing OutOfMemoryErrors.