SCJP题 about Garbage Collection

[Patrick_DK]

5. Which is true?
A. Calling System.gc() causes garbage collection to occur, but the time for the process to complete is unspecified.
B. Calling Runtime.gc() causes garbage collection to occur, but the time for the process to complete is unspecified.
C. Memory leaks are impossible in Java.
D. Memory is used more efficiently in Java.
E. Memroy corruption due to double use of memory is impossible in Java.


真火，题目看不太明白，特别是CDE选项．
请帮忙解释一下．

[jean777]

c,d,e is true

[jean777]

:)?

[Patrick_DK]

错了，老大

[javamap]

e

[Patrick_DK]

楼上的，能解释一下整道题，并说说为什么选Ｅ吗？

[javamap]

1) when gc finishes, the process is done
2) System.gc is the same as Runtime.gc
3) If you creates objects and put them into a list but never delete those objects, memory leak still happens.
4) Java is easy to write, but never be efficient. Because Java don't delete objects, so it is not efficient
5) because you don't delete, so memory will not be corrupted.

[waffle]

C. 在java中内存泄漏是不可能的
D. java中内存得到更加有效的利用
E. 由于同一内存块被多次引用而导致错误在java中是不可能的

[Patrick_DK]

那么你说答案是什么？