What will be the output when the following code segment is executed?
a) string str = "welcome to cst1201";
b) string code;
c) int len = str. length();
d) system. out. println(len);
e) system. out. println(str. charat(3));
f) system. out. println(str. substring(len-4);

18

c

1201

Explanation:

In step A, a string str is initialized as "welcome to CST1201"In step B, a string naming code is declared.Step C says that the length of the str (number of characters in str) is stored in an integer len.Step D will print out the integer len which is equal to 18.Step E will print the character of string str at index 3. As indexes start from 0 so "c" will be at index 3.Step F will print the sub string from string str which will start from 4th last character of string str till end of str. So it will be 1201.

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