Question: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';
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+ Answer
A
+ ExplanationOption 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).