Complete Java 2 certification study guide by Philip Heller

By Philip Heller

Are looking to triumph over of the main tough programmer certifications? the hot variation of the best-selling entire Java 2 Certification examine advisor is the source you would like. Authors Philip Heller and Simon Roberts, builders of Sun's Programmer and Developer tests for the Java 2 Platform, provide you with every little thing you want to go the tests the 1st time. This totally revised variation is up-to-date for the adjustments in either checks, together with insurance of latest ambitions for J2SE 1.4, a brand new emphasis on Swing and RMI, and data for tackling the hot structure of the Developer examination. The e-book is usually stronger with all-new positive factors from Sybex's market-leading research courses, together with examination crucial sections to enhance key topic parts and real-world situation sidebars with pattern programming assignments. The better half CD includes the entire overview questions from the publication, a tradition programmer's examination, and a hundred and fifty random-test questions, together with a hundred new questions. The CD additionally incorporates a totally searchable digital variation of the ebook.

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Com 28 Chapter 1 Language Fundamentals 5. Consider the following line of code: int[] x = new int[25]; After execution, which statements are true? ) A. x[24] is 0. B. x[24] is undefined. C. x[25] is 0. D. x[0] is null. E. length is 25. 6. Consider the following application: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. held++; } } What value is printed out at line 6? A. 0 B. 1 C. 100 D. com Test Yourself 29 7. Consider the following application: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.

Return result; 7. } Here the result is initialized on line 4, but the initialization takes place within the curly braces of lines 3 and 5. ” A common solution is to initialize result to some reasonable default as soon as it is declared: 1. public double fourthRoot(double d) { 2. 0; // Initialize 3. if (d >= 0) { 4. sqrt(d)); 5. } 6. return result; 7. } Now result is satisfactorily initialized. Line 2 demonstrates that an automatic variable may be initialized in its declaration line. Initialization on a separate line is also possible.

Conversely, when a 0 bit is in the most significant position before the shift, 0 bits are introduced during the shift. 3 Signed right shift of positive and negative numbers This might seem like an arbitrary and unduly complex rule governing the bits that are shifted in during a signed right-shift operation, but there is a good reason for the rule. If a binary number is shifted left one position (and provided none of the bits that move off the ends of a left-shift operation are lost), the effect of the shift is to double the original number.

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