If two threads access the same hashmap at the same time, what would happen?(a) ConcurrentModificationException(b) NullPointerException(c) ClassNotFoundException(d) RuntimeExceptionI had been asked this question in an online interview.Asked question is from Data Structures-HashMap topic in portion java.util – The Collections Framework of Java

If two threads access the same hashmap at the same time, what would ha

1.	If two threads access the same hashmap at the same time, what would happen?(a) ConcurrentModificationException(b) NullPointerException(c) ClassNotFoundException(d) RuntimeExceptionI had been asked this question in an online interview.Asked question is from Data Structures-HashMap topic in portion java.util – The Collections Framework of Java
Answer» Right OPTION is (a) ConcurrentModificationException The best I can explain: The code will THROW ConcurrentModificationException if two THREADS ACCESS the same hashmap at the same TIME.

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