Oracle 1Z0-809 Exam to Tactically Prepare Your Java SE 8 Programmer II Certification

In today's fast-paced and competitive IT industry, acquiring certifications can significantly increase your career opportunities and demonstrate your expertise in a particular technology or platform. One such valuable certification is the Oracle 1Z0-809 certification.Importance of Oracle 1Z0-809 CertificationThe Oracle 1Z0-809 certification, also known as the Java SE 8...

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Quiz yourself: Java’s sealed types—true-or-false quiz

Test your knowledge of valid sealed classes, subclasses, and the permits section.Which statement is true? Choose one.A. A sealed type declaration must have a permits section. B.  A sealed class must have at least one direct subclass. C. A sealed interface must have at least one direct implementation....

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Quiz yourself: Comparing Java arrays and interpreting the mismatch method

The java.util.Arrays class methods aren’t always intuitive.Given the following code fragmentint a1[] = { 5, 24, 54, 22 };int a2[] = { 5, 23, 56, 202 };int a3[] = { 3, 8, 19, 39, 56 };System.out.print(Arrays.compare(a1, a2));System.out.print(Arrays.compare(a3, a2));System.out.print(Arrays.mismatch(a1, a1));System.out.print(Arrays.mismatch(a2, a1));Which output is guaranteed? Choose one.A. 1-1-11 B. 2-1-12...

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Handling time zones in distributed systems, Part 2

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REST APIs can simplify and automate time zone processing in distributed Java applications.The first article in this series, “Handling time zones in distributed systems, Part 1,” discussed how to consider customers’ time zones. It’s a complex topic, and after a bit of discussion, I recommended that the most...

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