Short answerModerate2 marks
Name the following: (a) The return data type of the method equals(). (b) The String method which has no parameter and returns a String.
Topic: String method return types
Previous-year question practice database
Answer
Exam answer
(a) boolean (b) trim() — it removes the leading and trailing spaces and returns the resulting String. (toUpperCase() and toLowerCase() are equally acceptable.)
Explanation
(a) equals() compares two strings and answers a yes-or-no question, so it returns boolean — true or false. Do not confuse it with compareTo(), which returns an int. (b) The requirement is two-fold: no parameter AND a String return. trim(), toUpperCase() and toLowerCase() all qualify. substring() returns a String but takes parameters; length() takes none but returns an int; charAt() fails on both counts. Reading both conditions is the whole test here.
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