INTRODUCTION TO JAVA PROGRAMMING教学（华南理工）TEST6.docVIP

1 What is the representation of the third element in an array called a? A. a[2] B. a(2) C. a[3] D. a(3) A 2 If you declare an array double[] list = {3.4, 2.0, 3.5, 5.5}, list[1] is ________. A. 3.4 B. 2.0 C. 3.4 D. 5.5 E. undefined B 3 Which of the following is incorrect? A. int[] a = new int[2]; B. int a[] = new int[2]; C. int[] a = new int(2); D. int a = new int[2]; E. int a() = new int[2]; CDE 4 If you declare an array double[] list = {3.4, 2.0, 3.5, 5.5}, the highest index in array list is __________. A. 0 B. 1 C. 2 D. 3 E. 4 D 5 How many elements are in array double[] list = new double[5]? A. 4 B. 5 C. 6 D. 0 6 Suppose int i = 5, which of the following can be used as an index for array double[] t = new double[100]? A. i B. (int)(Math.random() * 100)) C. i + 10 D. i + 6.5 E. Math.random() * 100 ABC 7 Analyze the following code.public class Test {??public static void main(String[] args) {????int[] x = new int[3];????System.out.println(x[0] is + x[0]);??}} A. The program has a compile error because the size of the array wasnt specified when declaring the array. B. The program has a runtime error because the array elements are not initialized. C. The program runs fine and displays x[0] is 0. D. The program has a runtime error because the array element x[0] is not defined. C 8 Which of the following statements is valid? A. int i = new int(30); B. double d[] = new double[30]; C. int[] i = {3, 4, 3, 2}; D. char[] c = new char(); E. char[] c = new char[4]{a, b, c, d}; BC Explanation: char[] c = new char[]{a, b, c, d}; 9 How can you initialize an array of two characters to a and b? A. char[] charArray = new char[2]; charArray = {a, b}; B. char[2] charArray = {a, b}; C. char[] charArray = {a, b}; D. char[] charArray = new char[]{a, b}; CD 10 What would be the result of attempting to compile and run the following code?????????????????public class Test {??public static void main(String[] args) {????double[] x = new double[]{1, 2, 3};????System.out.println(Va