To answer this question, let's go through each line of code and understand its behavior:

1. Integer ten = new Integer(10); - This line creates a new instance of the Integer class and assigns the value 10 to it.

2. Long nine = new Long(9); - This line creates a new instance of the Long class and assigns the value 9 to it.

3. System.out.println(ten + nine); - This line attempts to print the sum of ten and nine. Since ten is an Integer and nine is a Long, the Java compiler will try to promote ten to a Long before performing the addition. However, this operation is not supported, and it will result in an error.

4. int i = 1; - This line declares and initializes an integer variable i with the value 1.

5. System.out.println(i + ten); - This line attempts to print the sum of i and ten. Since ten is an Integer and i is an int, the Java compiler will automatically promote i to an Integer before performing the addition. The sum will be 1 + 10 = 11, and it will be printed as the output.

Therefore, the correct answer is C. Error: Can't convert java lang Integer. The code will fail to compile because the addition of an Integer and a Long is not supported.

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• Wrong explanation

To answer this question, let's go through the line of code:

Double table[];

This line of code declares a variable named table of type Double and specifies that it refers to an array of Double objects.

Option A) table is a variable that refers to a real number - This option is incorrect because Double in Java refers to a wrapper class for the primitive data type double, not a real number.

Option B) table is a variable that refers to two numbers - This option is incorrect because the code does not indicate that table refers to two numbers specifically. It simply declares a variable that can refer to an array.

Option C) It is not legal Java code - This option is incorrect because the code is valid Java syntax. It declares a variable of type Double array.

Option D) table is a variable that refers to an array - This option is correct because the line of code declares a variable named table that refers to an array. The [] syntax indicates that table is an array variable.

The correct answer is D) table is a variable that refers to an array.

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• Wrong explanation