How would you define an even number in an array of integers in Java?

• A. By checking if a number is divisible by 3
• B. By checking if a number is divisible by 4
• C. By checking if a number is divisible by 2
• D. By checking if a number ends with 0

Answer: (C)

An even number is defined as any integer that is divisible by 2. This means that when an even number is divided by 2, there is no remainder. In Java, you can determine if a number is even using the modulus operator (%) to check if the number modulo 2 equals zero. This simple condition accurately identifies even numbers in an array of integers.

The other options do not accurately define even numbers. Checking for divisibility by 3 or 4 identifies different sets of numbers and does not relate to the characteristics of even numbers. Similarly, the condition about a number ending with 0 applies to multiples of 10, which can include both even and odd numbers but does not specifically define even numbers exclusively. Thus, the most accurate definition of an even number is through its divisibility by 2.