The statement
S1)equalsIgnoreCase(s4)
Is equivalent to which of the following?
A)s1.regionMatches(true,0,s4,0,s4.length());
B)s1.regionMatches(0,s4,0,s4.length());
C)s1.regionMatches(0,s4,0,s4.length);
D)s1.regionMatches(true,s4,0,s4.length);

Question

Quizplus · Accepted Answer

The method regionMatches() compares two strings within a specified range of character positions. The first argument is an index in the calling string (s1) from where the comparison starts. The second argument (true or false) specifies whether the comparison is case sensitive or not. The next two arguments are the index and length of the substring in the second string (s4) that needs to be compared with the substring in the first string. So, s1.regionMatches(true,0,s4,0,s4.length()) is the correct equivalent expression of s1.equalsIgnoreCase(s4) as it ignores the case differences and compares the entire substring of s4 with the starting index 0 of s1.

The Statement S1)equalsIgnoreCase(s4)