1.下列数组创建并初始化格式错误的是( C )

	A: int[] arr = new int[] {33,22,11};
	B: int[] arr = new int[4];
	C: double[] arr = new double[3]{5.2, 3.14, 6.18};
	D: int[] arr = {11,22,33};

2.数组a的第三个元素表示为（ D ）

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

3.当访问无效的数组下标(就是索引)时，会发生（B  ）现象

	A: 正常执行
	B: 程序出错
	C: 跳过当前行,继续执行下一行
	D: 无现象

4.代码如下,运行结果是7,则横线处应该填写的内容是( C )
public static void main(String[] args){
    int[] arr = { 3,7,6,9,2,5,8 };
    System.out.println(______arr[1]______);
}

	A: arr[6]
	B: arr[2]
	C: arr[1]
	D: arr[0]

5.下列代码的运行结果是( D )
public static void main(String[] args) {
    int arr[] = {1, 3, 5, 7, 9};
    System.out.println("结果是："+arr[1]);
    System.out.println("结果是："+arr[arr.length-1]);
}

	A: 结果是:1 结果是:9
	B: 结果是:1 结果是:7
	C: 结果是:3 结果是:7
	D: 结果是:3 结果是:9

6.下列代码中,有关数组的定义格式错误的是(  C   )

	A: int[] arr = {1,2,3,4,5,6};
	B: int[] arr = new int[3];
	C: int[] arr = new int[6]{1,2,3,4,5,6};
	D: int[] arr = new int[]{1,2,3,4,5,6};

7.下列代码能够正常遍历数组的是( B )

A:

public class Demo{
    public static void main(String[] args){
        int[] arr = {1,2,3,4,5,6,7};
        for (int i = 0; i <= arr.length; i++) {
            System.out.println(arr[i]);
        }
    }
}

B:

public class Demo{
    public static void main(String[] args){
        int[] arr = {1,2,3,4,5,6,7};
        for (int i = 0; i < arr.length; i++) {
            System.out.println(arr[i]);
        }
    }
}

C:

public class Demo{
    public static void main(String[] args){
        int[] arr = {1,2,3,4,5,6,7};
        int i = 0;
        while(i < arr.length){
            System.out.println(arr[i]);
        }
    }
}

D:

public class Demo{
    public static void main(String[] args){
        int[] arr = {1,2,3,4,5,6,7};
        for (int i = 0; ; i++) {
            System.out.println(arr[i]);
        }
    }
}

	A:
	B:
	C:
	D:

8.下列代码能够获取任意数组中元素最大值的是( C )

A:

public class Demo{
    public static void main(String[] args){
        int[] arr = {23,544,56,1,23,45,21,1,78};
        int max = arr[0];
        for (int i = 1; i < arr.length; i++) {            
            if(max < arr[i]){
                arr[i] = max;
            }
            System.out.println(max);
        }
    }
}

B:

public class Demo{  
    public static void main(String[] args){
        int[] arr = {23,544,56,1,23,45,21,1,78};
        int max = arr[0];
        for (int i = 1; i < arr.length; i++) {
            if(max > arr[i]){
                max = arr[i];
            }
        }
        System.out.println(max);
    }
}

C:

public class Demo{
    public static void main(String[] args){
        int[] arr = {23,544,56,1,23,45,21,1,78};
        int max = arr[0];
        for (int i = 1; i < arr.length; i++) {
            if(max < arr[i]){
                max = arr[i];
            }
        }
        System.out.println(max);
    }
}

D:

public class Demo{
    public static void main(String[] args){
        int[] arr = {-23,-544,-56,-1,-23,-45,-21,-1,-78};
        int max = arr[0];
        for (int i = 0; i < arr.length; i++) {
            if(max > arr[i]){
                arr[i] = max;
            }
        }
        System.out.println(max);
    }
}

	A:
	B:
	C:
	D:

9.下面代码用于获取数组的最大值,画横线区域处应填写代码正确的是 ( C )

public static void main(String[] args){
    int[] arr = { 2,7,-1,6,3 };
    _____(1)______
    for(int i=1;i<arr.length;i++){
        if(___(2)____){
           ___(3)____
        }
    }
    System.out.println("最大值是:" + max);
}

	A: (1)int max = 0; (2)arr[i]<max; (3)arr[i] = max;
	B: (1)int max = 0; (2)arr[i] > max; (3)max = arr[i];
	C: (1)int max = arr[0]; (2)arr[i] > max; (3)max = arr[i];
	D: (1)int max = arr[0]; (2)arr[i] > max; (3)arr[i]= max ;

10.【多选题】下列操作中能够正常编译运行的是( AC )

A:

public static void main(String[] args){
    int[] arr = {1,2,3};
    int[] nums = arr;
}

B:

public static void main(String[] args){
    int[] arr = {1,2,3};
    int num = arr0;
}

C:

public static void main(String[] args){
    int[] arr = {1,2,3};
    arr[1] = 5;
}

D:

public static void main(String[] args){
    int[] arr = {1,2,3};
    arr.[0] = 2;
}

	A:
	B:
	C:
	D: