超星 - Quiz for Chapter 7 - 查题吧

单选题

Binary search can be applied on an unsorted list.

A. false
B. true

单选题

An array can be used in which of the following ways?

As a local variable
B. As a parameter of a method
C. All of the above
D. As a return value of a method

单选题

Suppose array a is int[] a = {1, 2, 3}, what is a[0] - a[2]?

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

单选题

What is the output of the following code? double[] myList = {1, 5, 5, 5, 5, 1}; double max = myList[0]; int indexOfMax = 0; for (int i = 1; i < myList.length; i++) {if (myList[i] > max) {max = myList[i];indexOfMax = i;} }System.out.println(indexOfMax);

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

单选题

What is the output of the following code?int[] myList = {1, 2, 3, 4, 5, 6}; for (int i = myList.length - 2; i >= 0; i--) {myList[i + 1] = myList[i];} for (int e: myList) System.out.print(e + " ");

A. 6 1 2 3 4 5
B. 6 2 3 4 5 1
C. 1 2 3 4 5 6
D. 1 1 2 3 4 5

单选题

What is the output of the following code? double[] myList = {1, 5, 5, 5, 5, 1}; double max = myList[0]; int indexOfMax = 0; for (int i = 1; i < myList.length; i++) {if (myList[i] >= max) {max = myList[i];indexOfMax = i;} }System.out.println(indexOfMax);

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

单选题

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("Value is " + x[1]);} }

A. The program compiles and runs fine and the output "Value is 2.0" is printeD.
B. The program has a compile error because the syntax new double[]{1, 2, 3} is wrong and it should be replaced by new double[]{1.0, 2.0, 3.0};
C. The program has a compile error because the syntax new double[]{1, 2, 3} is wrong and it should be replaced by new double[3]{1, 2, 3};
D. The program has a compile error because the syntax new double[]{1, 2, 3} is wrong and it should be replaced by {1, 2, 3}.

单选题

What is output of the following code: public class Test { public static void main(String[] args) { int[] x = {120, 200, 016}; for (int i = 0; i < x.length; i++)System.out.print(x[i] + " ");} }

A. 120 200 14
B. 120 200 16
C. 016 is a compile error. It should be written as 16.
D. 120 200 20

单选题

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

A. 1 2
B. 2 2
C. 2 1
D. 1 1

单选题

What is output of the following code: public class Test { public static void main(String[] args) {int list[] = {1, 2, 3, 4, 5, 6}; for (int i = 1; i < list.length; i++)list[i] = list[i - 1];for (int i = 0; i < list.length; i++)System.out.print(list[i] + " ");} }

A. 1 1 1 1 1 1
B. 2 3 4 5 6 1
C. 2 3 4 5 6 6
D. 1 2 3 4 5 6

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