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In Java, if you forget to call a superclass constructor explicitly in the constructor of a subclass, what will happen?

Suppose you wish to implement the Comparable interface to allow your Vehicle class to compare Auto objects only. Which of the following is the correct way to do this?

Consider the following code snippet: myImage.add(new Rectangle(10,10,10,10)); This code is an example of using  ____.

The method below implements the exponentiation operation recursively by taking advantage of the fact that, if the exponent n is even, then xn = (x n/2)2. Select the expression that should be used to complete the method so that it computes the result correctly. public static double power(double base, int exponent) { if (exponent % 2 != 0) // if exponent is odd { return base * power(base, exponent – 1); } else if (exponent > 0) { double temp = ________________________ ; return temp * temp; } return base; }

In Java, if you forget to call a superclass constructor explicitly in the constructor of a subclass, what will happen?

A class that implements an interface must provide an implementation for all ____ methods.

Consider the following code snippet: Scanner in = new Scanner(. . .); in.useDelimiter(“[^0-9A-Za-z]+”); What characters will be ignored and not read in using this code?

Consider the following code snippet: Scanner in = new Scanner(. . .); in.useDelimiter(“[^A-Za-z]+”); What characters will be ignored and not read in when using this code?

Consider the following code snippet: Scanner in = new Scanner(. . .); in.useDelimiter(“[^0-9A-Za-z]+”); What characters will be ignored and not read in using this code?

Why does the best recursive method usually run slightly slower than its iterative counterpart?