OCP Java SE 6 Programmer Practice Exams (Exam 310 ... - Kitabxana

292Chapter 6: Practice Exam 3Which are true? (Choose all that apply.)A. Compilation fails.B. No output is produced.C. The output will contain "t1 "D. The output will contain "t2 "E. The output will contain "!= "F. The output is "t1 ", followed by an exception.Answer (for Objective 2.1): D is correct. Unboxing automatically converts the Boolean objects to booleanprimitives. The Boolean(String) constructor views null Strings AND Stringsthat don’t have the value of "true" (case-insensitive) to be false. It’s legal for "if"tests to be based on method calls that return a boolean. Finally, when "==" or "!=" isused to compare a wrapper object with a primitive, the wrapper is unwrapped before thecomparison. A, B, C, E, and F are incorrect based on the above.27. Which are valid command-line switches when working with assertions? (Choose all that apply.)A. -eaB. -daC. -dsaD. -evaE. -enableassertionsAnswer (for Objective 2.3): A, B, C, and E are valid command-line switches. D is incorrect because -eva does not exist.28. Given:4. class Account { Long acctNum, password; }5. public class Banker {6. public static void main(String[] args) {7. new Banker().go();