Which error occurs when trailing digits are cut off?

Which error occurs when trailing digits are cut off?

• A. Logical error
• B. Truncation error
• C. Arithmetic error
• D. Semantic error

Answer: (B)

Truncation error happens when you discard digits after a certain point in a number or calculation, leaving an approximation of the true value. If you store a value with limited precision or stop a decimal expansion early, the digits you cut off introduce this error. For example, cutting off digits beyond two decimal places produces a truncated value rather than the exact one, and the difference is the truncation error. This is distinct from rounding, where you decide whether to increase the last kept digit based on the next digit. The other error types describe different problems: a logical error comes from incorrect program logic, an arithmetic error from invalid math operations, and a semantic error from code that doesn’t express the intended meaning.

Truncation error happens when you discard digits after a certain point in a number or calculation, leaving an approximation of the true value. If you store a value with limited precision or stop a decimal expansion early, the digits you cut off introduce this error. For example, cutting off digits beyond two decimal places produces a truncated value rather than the exact one, and the difference is the truncation error. This is distinct from rounding, where you decide whether to increase the last kept digit based on the next digit.

The other error types describe different problems: a logical error comes from incorrect program logic, an arithmetic error from invalid math operations, and a semantic error from code that doesn’t express the intended meaning.