A byte can be of what size
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-128 to 127
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(-2 power 8 )-1 to 2 power 8
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-255 to 256
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depends on the particular implementation of the Java Virtual machine
In Java, the byte data type is a signed 8-bit two's complement integer. Its value range is strictly defined from -128 to 127. This size is platform-independent and does not depend on the particular implementation of the Java Virtual Machine.
To answer this question, you 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 be either a 0 or a 1, representing a binary value. With 8 bits, a byte can represent 2^8 (256) different values.
Option A) -128 to 127 - This option is correct because a byte can represent values from -128 to 127. In 2's complement representation, the leftmost bit is used as the sign bit, where 0 represents a positive value and 1 represents a negative value. This allows for a range of -2^7 (-128) to 2^7-1 (127).
Option B) (-2^8)-1 to 2^8 - This option is incorrect because it states a range from -255 to 256, which exceeds the valid range for a byte. The valid range for a byte is from -128 to 127.
Option C) -255 to 256 - This option is incorrect for the same reason as option B. The valid range for a byte is from -128 to 127.
Option D) depends on the particular implementation of the Java Virtual machine - This option is incorrect because the size of a byte is standardized and consistent across different implementations of the Java Virtual Machine. The range of -128 to 127 is universally accepted for a byte.
The correct answer is A) -128 to 127. This option is correct because it accurately represents the valid range for a byte.