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Oracle

1Z0-803 · Question #216

Given the fragment: What is the result?

The correct answer is A. 13480.0. The question asks for the numeric result of an arithmetic expression involving mixed double, int, and float data types.

Working with Java Data Types

Question

Given the fragment:

What is the result?

Options

  • A13480.0
  • B13480.02
  • CCompilation fails
  • DAn exception is thrown at runtime

How the community answered

(33 responses)
  • A
    73% (24)
  • B
    3% (1)
  • C
    9% (3)
  • D
    15% (5)

Why each option

The question asks for the numeric result of an arithmetic expression involving mixed `double`, `int`, and `float` data types.

A13480.0Correct

In Java, when performing arithmetic operations involving `double`, `int`, and `float` types, smaller data types are automatically promoted to the largest type in the expression to prevent data loss. The specific fragment's calculations, applying these promotion rules, would lead to the result `13480.0` as a `double` value.

B13480.02

This result indicates a different calculation or a potential floating-point precision error that is not the intended correct answer for the given fragment.

CCompilation fails

Mixed-type arithmetic operations are generally handled by Java's automatic type promotion and do not typically cause compilation errors unless there's an explicit type mismatch without promotion.

DAn exception is thrown at runtime

Standard arithmetic operations with type promotion do not throw runtime exceptions unless specific conditions like division by zero or null pointer access occur, which are not implied by the choice being a numeric result.

Concept tested: Java implicit type promotion in arithmetic

Source: https://docs.oracle.com/javase/specs/jls/se11/html/jls-5.html#jls-5.6.2

Topics

#primitive types#type casting#arithmetic operators

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