which-is-a-valid-declarations-of-a-string-5e8ac7f19f5f597f4815a15d

Which is a valid declarations of a String?

String s1 = null;
String s2 = 'null';
String s3 = (String) 'abc';
String s4 = (String) '\ufeed';

Option A sets the String reference to null.

Option B is wrong because null cannot be in single quotes.

Option C is wrong because there are multiple characters between the single quotes ('abc').

Option D is wrong because you can't cast a char (primitive) to a String (object).