Multiple choice technology

Given: 12. NumberFormat nf = NumberFormat.getInstance(); 13. nf.setMaximumFractionDigits(4); 14. nf.setMinimumFractionDigits(2); 15. String a = nf.format(3.1415926); 16. String b = nf.format(2); Which two statements are true about the result if the default locale is Locale.US? (Choose two.)

  1. The value of b is 2.

  2. The value of a is 3.14.

  3. The value of b is 2.00.

  4. The value of a is 3.141

  5. The value of a is 3.1416

  6. The value of b is 2.0000
Reveal answer Fill a bubble to check yourself
C,E Correct answer
Explanation

NumberFormat with minFractionDigits=2 ensures at least 2 decimal places, so format(2) produces '2.00'. With maxFractionDigits=4, format(3.1415926) rounds to 4 decimal places using standard rounding rules, giving '3.1416' (the 5th digit is 9, so 3.1415 rounds up to 3.1416).

AI explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) The value of b is 2 - This statement is incorrect. The value of b is not affected by the NumberFormat settings, so it remains as the original value, which is 2.

Option B) The value of a is 3.14 - This statement is incorrect. The NumberFormat settings specified that the maximum fraction digits should be 4. Therefore, the value of a will be rounded to 4 decimal places, resulting in 3.1416, not 3.14.

Option C) The value of b is 2.00 - This statement is correct. The NumberFormat settings specified that the minimum fraction digits should be 2. Since the value of b is an integer (2), it will be formatted with 2 decimal places, resulting in 2.00.

Option D) The value of a is 3.141 - This statement is incorrect. As mentioned earlier, the NumberFormat settings specified that the maximum fraction digits should be 4. Therefore, the value of a will be rounded to 4 decimal places, resulting in 3.1416, not 3.141.

Option E) The value of a is 3.1416 - This statement is correct. The NumberFormat settings specified that the maximum fraction digits should be 4. Since the value of a has more than 4 decimal places, it will be rounded to 4 decimal places, resulting in 3.1416.

Option F) The value of b is 2.0000 - This statement is incorrect. The value of b is not affected by the NumberFormat settings, so it remains as the original value, which is 2.

The correct answers are options C and E. These options correctly describe the values of a and b after applying the NumberFormat settings.

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