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Suppose s1 and s2 are variables of type string

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Reference no: EM132211091

Suppose s1 and s2 are variables of type String, and both have been properly initialized with non-empty values. Which one of the following instructions will produce an error message (either at compile time or at execution time)?

A. String s3 = s1 + s2;

B. if (s1 == s2) System.out.println ("Foobar");

C. boolean b = (s1.startsWith(s2));

D. s1.charAt (0) = 'x';

E. int i = s1.toUpperCase().indexOf("blah");

Reference no: EM132211091

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