Question

Which of the following statements contains an error?

I. char gender = genderString.charAt(0);
II. boolean isFemale = gender == "F";
III. int age = Integer.parseInt(ageString);

A. I only
B. II only
C. III only
D. I and II only
E. II and III only

Answer 1

I. is syntactically correct if genderString exists. if genderString, for example, is "Male", then char gender would be the character at index 0 (the first character), meaning 'M'.

II. is incorrect. It is using the comparison operator (==) instead of the assignment operator (=). It is also setting a boolean variable to a String value of 'F'. Boolean values cannot hold string values, and can only hold true & false.

III. is correct if ageString only contains numbers (presumably, it does, as it's called ageString). Integer.parseInt is a function that converts String values to integer values if the string values only contain numerical characters.

The answer in this case should be B. II only.