Multiple choice technology programming languages

Given: 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

In Java, System.out.format expects arguments matching the format specifiers. Math.PI is a double, but %d is the specifier for integer types. Passing a double to %d causes a java.util.IllegalFormatConversionException to be thrown at runtime.

AI explanation

To answer this question, we need to understand the syntax and behavior of the System.out.format() method.

In the given code snippet, System.out.format() is used to format output to the console. The format string "Pi is approximately %d." contains a placeholder %d, which is used to specify that a decimal integer value will be inserted at that position in the output.

However, the Math.PI constant in Java is a double value, not an integer. Therefore, when attempting to format the output using %d, a runtime exception will be thrown.

So, the correct answer is:

D. An exception is thrown at runtime

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