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How do you clear an arraylist in java?
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what is d difference between deep cloning and shallow cloning in core java?
write a program that list all permutations of ABCDEF in which A appears before B?
7) Suppose there is Student class like class student { int age; string name; } We want to store these objects in a HashMap. Do we need to override any methods in Student class? If any which ones and why? what if i just override equals or just hashcode? what will be the results in both the cases?
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