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When a StackADT is implemented using an oversized array, which of the following is a MORE efficient implementation? Having the bottom of the stack at index 0 of the array. Having the top of the stack at index 0 of the array. Both choices are equally efficient. In order for the following code to work as expected, 's data type MUST implement which of these interfaces? for (String s : myDataStructure) \{ System. out.println(s); \} Vhat does the recursive method described below do? public static int mystery( ( LinkedNode current) \{ if ( current == null) \{ return ; int x= mystery ( current. getNext ()); if ( current. getData() =0){ x++; return x; The mystery method always returns 0. The mystery method returns 0 if is null and 1 otherwise. The mystery method returns the index of the first 0 in a linked list starting from The mystery method returns the number of 0 s which occur in a linked list starting from At most, how many references may be and have caused a NullPointerException to be thrown from the following line of code? boolean correct = queue peek().getName( ). isBlank(); 1 2 3 4Step by Step Solution
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