超星 - Quiz for Chapter 7

单选题

Analyze the following code: public class Test { public static void main(String[] args) { int[] x = {0, 1, 2, 3, 4, 5};xMethod(x, 5);} public static void xMethod(int[] x, int length) { for (int i = 0; i < length; i++)System.out.print(" " + x[i]);} }

A. The program displays 0 1 2 3 4.
B. The program displays 0 1 2 3 4 5.
C. The program displays 0 1 2 3 4 and then raises a runtime exception.
D. The program displays 0 1 2 3 4 5 and then raises a runtime exception.

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单选题

The reverse method is defined in this section. What is list1 after executing the following statements? int[] list1 = {1, 2, 3, 4, 5, 6}; int[] list2 = reverse(list1);

A. list1 is 1 2 3 4 5 6
B. list1 is 0 0 0 0 0 0
C. list1 is 6 6 6 6 6 6
D. list1 is 6 5 4 3 2 1

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单选题

In the following code, what is the printout for list1? public class Test {public static void main(String[] args) {int[] list1 = {1, 2, 3};int[] list2 = {1, 2, 3};list2 = list1;list1[0] = 0; list1[1] = 1; list2[2] = 2; for (int i = 0; i < list1.length; i++)System.out.print(list1[i] + " ");} }

A. 0 1 3
B. 1 1 1
C. 0 1 2
D. 1 2 3

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单选题

What is the representation of the third element in an array called a?

A. a[3]
B. a[2]
C. a(3)
D. a(2)

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单选题

Use the selectionSort method presented in this section to answer this question. What is list1 after executing the following statements? double[] list1 = {3.1, 3.1, 2.5, 6.4}; selectionSort(list1);

A. list1 is 3.1, 3.1, 2.5, 6.4
B. list1 is 3.1, 2.5, 3.1, 6.4
C. list1 is 2.5 3.1, 3.1, 6.4
D. list1 is 6.4, 3.1, 3.1, 2.5

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单选题

If you declare an array double[] list = {3.4, 2.0, 3.5, 5.5}, list[1] is ________.

A. 3.5
B. 2.0
C. undefined
D. 3.4

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单选题

When you return an array from a method, the method returns __________.

A. the reference of the array
B. the length of the array
C. a copy of the array
D. a copy of the first element

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单选题

How many elements are in array double[] list = new double[5]?

A. 4
B. 0
C. 5
D. 6

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单选题

If you declare an array double[] list = {3.4, 2.0, 3.5, 5.5}, the highest index in array list is __________.

A. 1
B. 4
C. 2
D. 3

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单选题

The array index is not limited to int type.

A. false
B. true

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