Q1. Why Java don't use pointers ?
Ans. Pointers are vulnerable and slight carelessness in their use may result in memory problems and hence Java intrinsically manage their use.
Q2. Difference between C++ and Java ?
Ans. Java does not support pointers.
Q3. Do you think that Java should have had pointers ?
Ans.
Q4. Difference between a Pointer and a Reference ?
Ans. We can't get the address of a reference like a pointer. Moreover we cannot perform pointer arithmetic with references.
Q5. When does an application throw NullPointerException ?
Ans. When it tries to access an object element or method using reference which is actually null.