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Language Fundamentals - Programming

Q1:

Which is a valid declarations of a String?

A String s1 = null;

B String s2 = 'null';

C String s3 = (String) 'abc';

D String s4 = (String) '\ufeed';

ANS:A - String s1 = null;

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).