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Understanding functional and technical aspects of Java SE 11 Developer Exam Number: 1Z0-819

The following will be discussed in the ORACLE 1Z0-006 exam dumps pdf:

  • Implement functional interfaces using lambda expressions, including interfaces from the java.util.function package
  • Use Java Streams to filter, transform and process data
  • Use a Java array and List, Set, Map and Deque collections, including convenience methods
  • Create worker threads using Runnable and Callable, and manage concurrency using an ExecutorService and java.util.concurrent API
  • Develop thread-safe code, using different locking mechanisms and java.util.concurrent API
  • Sort collections and arrays using Comparator and Comparable interfaces

For more info read reference:

1Z0-006 Official Certification SiteOracle Cloud Learning Resources >> Oracle 1Z0-819 Valid Exam Practice <<

Pass Guaranteed Quiz 1Z0-819 - High Pass-Rate Java SE 11 Developer Valid Exam Practice

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Oracle Java SE 11 Developer Sample Questions (Q174-Q179):

NEW QUESTION # 174
Given the Person class with age and name along with getter and setter methods, and this code fragment:

What will be the result?

  • A. Aman Tom Peter
  • B. Tom Peter Aman
  • C. Tom Aman Peter
  • D. Aman Peter Tom

Answer: D
NEW QUESTION # 175
Given the code fragment:

You must make the countvariable thread safe.
Which two modifications meet your requirement? (Choose two.)

  • A. replace line 3 with
    synchronized(test) {
    test.count++;
    }
  • B. replace line 3 with
    synchronized(test.count) {
    test.count++;
    }
  • C. replace line 1 with private AtomicInteger count = new AtomicInteger(0);and replace line 3 with test.count.incrementAndGet();
  • D. replace line 1 with private volatile int count = 0;
  • E. replace line 2 with public static synchronized void main(String[] args) {

Answer: B,C Explanation:
Explanation/Reference: https://stackoverflow.com/questions/15852123/java-thread-safe-counter/15852164
NEW QUESTION # 176
Given:

executed using command:
java Hello "Hello World" Hello World
What is the output?

  • A. An exception is thrown at runtime.
  • B. Hello World Hello World
  • C. Hello WorldHello World
  • D. Hello WorldHelloWorld
  • E. HelloHello WorldHelloWorld

Answer: B
NEW QUESTION # 177
Given:

and
checkQuality(QUALITY.A);
and

Which code fragment can be inserted into the switch statement to print Best?

  • A. A
  • B. QUALITY.A
  • C. QUALITY.A.ValueOf()
  • D. A.toString()

Answer: A
NEW QUESTION # 178
What makes Java dynamic?

  • A. The Java compiler uses reflection to test if class methods are supported by resources of a target platform.
  • B. The Java compiler preprocesses classes to run on specific target platforms.
  • C. The runtime can process machine language sources as well as executables from different language compilers.
  • D. At runtime, classes are loaded as needed, and new code modules can be loaded on demand.

Answer: D
NEW QUESTION # 179
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