Quiz 9
Version 1

Quiz for CS 5 Week 9 0. What's wrong with your program if it produces this error message when you try to run it: java.lang.ArrayIndexOutOfBoundsException 1. What is the difference between the declaration: int[] fred, alice, suzie; and the declaration: int fred[], alice, suzie; 2. Maxwell declared times to be an array of doubles using: double[] times; and then followed this immediately with the line: times[4] = 5; What did he forget to do? 3. What is the index of the first element of an array? The third element? 4. What is a fence-post error? 5. How would you find out the number of elements of an array named idnums? 6. Give the header of a for loop designed to enumerate all the elements of the array idnums? 7. In order to use binary search to find a value in an array, the data in the array must have a particular property. What is it? 8. Suppose that phvals is declared as an array of doubles. What happens if you try to allocate it using the statement phvals = new double[Math.PI];? 9. Marcia declared an array of 15 ints, named sprockets using the line: int sprockets[] = new int[15]; She then attempted to initialize the array as follows: for (int i = 1 ; i <= 15 ; i++) { sprockets[i]=23; } Why didn't this work? 10. It takes a bit longer to access an array element in Java than it does in C. Why? What benefit do you get in return for this decrease in speed?

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