Multiple choice technology

Given: 12. System.out.format("Pi is approximately %d.", Math.PI); What is the result?

  1. Compilation fails.

  2. Pi is approximately 3.

  3. Pi is approximately 3.141593.

  4. An exception is thrown at runtime.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The format specifier %d expects an integer argument, but Math.PI is a double. The format() method validates at runtime that the argument type matches the format specifier and throws IllegalFormatConversionException when they don't match. The code compiles due to varargs autoboxing but fails at runtime.

AI explanation

To answer this question, let's analyze the given code snippet:

System.out.format("Pi is approximately %d.", Math.PI);

The code uses the System.out.format method to print the value of Pi.

The format specifier %d is used to format an integer value. However, Math.PI is a constant with a double data type, which means it is a floating-point number.

Therefore, the code will throw an exception at runtime because the format specifier %d is not compatible with the double data type.

So, the correct answer is D) An exception is thrown at runtime.

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