Complete Java2 Certification Study Guide by Philip Heller

By Philip Heller

Here's a revised and superior variation of the main respected Java certification advisor, with in-depth insurance of the newest types of the Java Programmer and Developer checks. Written by means of the folk who really created the checks for sunlight, this insider's consultant will organize you to take those scorching checks with self assurance. Sybex examine courses are filled with unprecedented research tools--hundreds of demanding assessment questions and digital flashcards that support make stronger key subject matters, and real-world situations that provide views and insights from pro execs. The CD comprises a sophisticated trying out engine with enormous quantities of pattern examination questions and the full ebook in PDF.

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Formula f = new Formula(); 2. Vector(); Line 2 is a mess. util package, so it must be referred to by its full name…twice! ) If there were no workaround, the only thing worse than writing Java code would be reading Java code. Fortunately, Java provides a workaround. Vector; Then line 2 becomes 2. util” prefix. When the compiler encounters a short class name, it checks the current package. If the class name is not found, the compiler then checks its import statements. In our example, the compiler will notice that there is no Vector class in the current package, but there is an import statement.

A class cannot extend a class that has been declared final. See Chapter 3 for more information. 11. D. The declaration of the integer array is incorrect. An array is declared by using curly braces ({}) instead of square brackets ([]). See Chapter 1 for more information. 12. D. The modulo (%) operator returns the leftover value after a division operation. In the given example, 23 / 4 = 5, with 3 remaining after the division. Therefore, the answer is 3. See Chapter 2 for more information. 13. C. The break keyword is used to stop execution of a loop.

A. Integer i = 7; B. Integer i = new Integer(5); int j = i; C. byte b = 7; D. int i = 7; byte b = i; E. None of the above 26. What will be the output of the following code? println("different"); } } } A. The code will compile but not run. B. The code will not compile. C. “different” will be printed out to the console. D. “same” will be printed out to the console. E. None of the above. 27. Java arrays always start at index 1. A. True B. False 28. Which of the following statements accurately describes how variables are passed to methods?

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