Question

Suppose s is a String which contains 5 characters. Which of the following calls will not cause an error?

a) None of the calls shown will cause an error
b) s.substring(0, 5)
c) s.substring(5, 5)
d) All the calls shown will cause an error
e) s.substring(5)

Answer 1

a) None of the calls shown will cause an error.

The correct calls to the substring method for a string of 5 characters that will not cause an error are b) s.substring(0, 5) and c) s.substring(5, 5), as these stay within the bounds of the string.

Step-by-step explanation:

The question pertains to the substring method in the context of string manipulation in programming. If s is a String which contains 5 characters, the call that will not cause an error is b) s.substring(0, 5).

This is because the substring method in many programming languages, including Java, takes two arguments: the starting index and the ending index, and returns the substring that starts at the starting index and extends to the character at index end - 1.

Since strings are zero-indexed, the indices for a 5-character string range from 0 to 4. Option c) s.substring(5, 5) will also not cause an error because it is a valid call that would return an empty string.

However, option e) s.substring(5) will throw an IndexOutOfBoundsException because you are trying to access a point beyond the string's length. The correct answer is: b) s.substring(0, 5) and c) s.substring(5, 5).