Q: Primitive data type 'byte' is having size _______ byte(s) in Java Programming.  

In Java programming, the primitive data type byte has a size of 1 byte.

Here are some details about the primitive data type byte in Java:

1. Size: The byte data type in Java is 8 bits, which means it occupies 1 byte of memory.

2. Range: It is a signed integer type, so it can represent values from -128 to 127 (inclusive). The range is calculated as -2⁷ to 2⁷ -1

3. Default Value: The default value of a byte variable is 0.

4. Usage: The byte data type is often used when dealing with raw binary data or when memory conservation is crucial. For example, it is commonly used in I/O operations or when working with large arrays of data where a small memory footprint is important.

5. Example:

   <span class="pln">
   </span><span class="kwd">byte</span><span class="pln"> myByte </span><span class="pun">=</span><span class="pln"> </span><span class="lit">42</span><span class="pun">;</span><span class="pln"> </span><span class="com">// Assigning a value to a byte variable</span><span class="pln">
   </span>

6. Conversion: When you perform operations with byte values, Java automatically promotes them to int. If you need to store the result back into a byte, you might need to explicitly cast the value.

   <span class="pln">
   </span><span class="kwd">byte</span><span class="pln"> a </span><span class="pun">=</span><span class="pln"> </span><span class="lit">10</span><span class="pun">;</span><span class="pln">
   </span><span class="kwd">byte</span><span class="pln"> b </span><span class="pun">=</span><span class="pln"> </span><span class="lit">20</span><span class="pun">;</span><span class="pln">
   </span><span class="com">// This line will result in a compilation error because the sum of two bytes is promoted to int</span><span class="pln">
   </span><span class="com">// byte sum = a + b;</span><span class="pln">
   </span><span class="com">// To fix the error, you need to explicitly cast it back to byte</span><span class="pln">
   </span><span class="kwd">byte</span><span class="pln"> sum </span><span class="pun">=</span><span class="pln"> </span><span class="pun">(</span><span class="kwd">byte</span><span class="pun">)</span><span class="pln"> </span><span class="pun">(</span><span class="pln">a </span><span class="pun">+</span><span class="pln"> b</span><span class="pun">);</span><span class="pln">
   </span>

It's important to note that while byte can be useful for certain scenarios, for general integer values, int is the preferred choice in Java, as it is the most efficient and is used by the Java Virtual Machine (JVM) in many operations.