Tag: programming languages

To answer this question, we need to understand the concept of a byte and its size.

A byte is a unit of digital information that consists of 8 bits. Each bit can either be a 0 or a 1. Therefore, a byte can represent 2^8 (256) different values.

Option A) -128 to 127 - This option is correct. In a byte, the range of values is typically represented as -2^7 to 2^7 - 1. This means that the minimum value that can be stored in a byte is -128 (-2^7) and the maximum value is 127 (2^7 - 1).

Option B) (-2^8)-1 to 2^8 - This option is incorrect. The range mentioned in this option is incorrect. The correct range should be from -2^7 to 2^7 - 1.

Option C) -255 to 256 - This option is incorrect. The range mentioned in this option is incorrect. The correct range should be from -128 to 127.

Option D) depends on the particular implementation of the Java Virtual Machine - This option is incorrect. The size of a byte is standardized across different programming languages and platforms. It is always 8 bits.

Based on the explanations above, the correct answer is option A. A byte can represent values from -128 to 127.

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

public class myprog {
    public static void main(String argv[]) {
        System.out.println(argv[2]);
    }
}

The main method is the entry point of the program. It takes a String array called argv as a parameter, which represents the command-line arguments passed to the program.

In the given command line: java myprog good morning, the arguments passed are "myprog", "good", and "morning".

The line System.out.println(argv[2]); attempts to print the element at index 2 of the argv array. In Java, arrays are zero-indexed, which means the first element is at index 0, the second element is at index 1, and so on.

However, in this case, the argv array only has 3 elements: "myprog", "good", and "morning". Since there is no element at index 2, an ArrayIndexOutOfBoundsException will be raised.

Therefore, the correct answer is:

D. Exception raised: "java.lang.ArrayIndexOutOfBoundsException: 2"

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• Wrong explanation