By Jeanne Boyarsky, Scott Selikoff
Entire, relied on instruction for the Java Programmer II examination OCP: Oracle qualified specialist Java SE eight Programmer II examine Guide is your finished better half for getting ready for examination 1Z0-809 in addition to improve examination 1Z0-810 and examination 1Z0-813.
With complete assurance of a hundred% of examination ambitions, this worthy consultant reinforces what you recognize, teaches you what you don't understand, and provides you the hands-on perform you must develop your abilities. Written through specialist Java builders, this publication is going past mere examination prep with the perception, motives and views that come from years of expertise. You'll evaluation the fundamentals of object-oriented programming, comprehend practical programming, follow your wisdom to database paintings, and masses extra. From the elemental to the complicated, this advisor walks you thru every thing you want to comprehend to with a bit of luck take the OCP 1Z0-809 examination and improve checks 1Z0-810 and 1Z0-813.
Java eight represents the largest alterations to the language thus far, and the newest examination now calls for that you simply reveal practical programming competence with a view to go.
This advisor has you lined, with transparent causes and specialist recommendation.
• comprehend summary sessions, interfaces, and sophistication layout
• research object-oriented layout ideas and styles
• Delve into practical programming, complicated strings, and localization grasp IO, NIO, and JDBC with expert-led database practice
If you're able to take your next step on your IT profession, OCP: Oracle qualified expert Java SE eight Programmer II examine Guide is your excellent better half at the street to certification.
Read Online or Download OCP: Oracle Certified Professional Java Se 8 Programmer II Study Guide: Exam 1Z0-809 PDF
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Additional resources for OCP: Oracle Certified Professional Java Se 8 Programmer II Study Guide: Exam 1Z0-809
The code throws a ConcurrentModificationException at runtime on line c2, because mammals is a synchronized list and not a concurrent one. Therefore, it is not safe to be used inside an iterator, and F is the correct answer. Note that if line c2 were removed, the rest of the code would run without throwing an exception, outputting 8 4 5. See Chapter 7 for more information. 6. B, C, F. A is incorrect, since there are definitely some problems with the immutable objects implementation. B is correct, because all instance variables should be marked final and private for the class to be considered immutable.
G. H. It outputs Clean! at least once. It outputs Clean! four times. The code will not compile because of line u1. The code will not compile because of line u2. The code will not compile because of line u3. The code will not compile because of line u4. It compiles but throws an exception at runtime. It compiles but waits forever at runtime. 2. What is the result of the following program? println("Text message to " + recipient); } } } A. Text message to null. B. Text message to 1234567890. C. A compiler error occurs on line 1.
D. The code does not compile because a method is not allowed to be both abstract and final. If final were removed, the answer would be B. An abstract class may contain an abstract method. A static nested class may extend other classes. For more information, see Chapter 1. 3. D, E. The code does not compile due to a number of issues, so A and F are incorrect. First off, the readObject() method is not available to the InputStream class, and since the ObjectInputStream has been upcast to InputStream, the code will not compile due to line 18, so E is correct.