Free Oracle 1Z1-804 Exam Dumps Questions & Answers

Given:

What is the result?

• A.George Washington John Adams Thomas Jefferson
• B.John Adams George Washington Thomas Jefferson
• C.Compilation fails
• D.An exception is thrown at runtime
• E.Thomas Jefferson John Adams George Washington

Given:

What is the result?

• A.Compilation fails.
• B.class java.lang.Exception
• C.class java.lang.ArraylndexOutOfBoundsException
• D.Null
• E.class java.lang.NullPointerException

Given the interface:
Public interface Idgenerator {
int getNextId();
}
Which class implements IdGenerator in a thread-safe manner, so that no threads can get a duplicate id value current access?

• A.Public class Generator Implements IdGenerator {
  private int id = 0;
  public int getnextId() {
  synchronized (id) {
  return ++id;
  }}}
• B.Public class Generator Implements IdGenerator {
  private int id = 0;
  public int getNextId() {
  synchronized (new Generator()) {
  return ++id;
  }}}
• C.Public class Generator Implements IdGenerator {
  private volatile int Id = 0;
  return ++Id;
  }
• D.Public class generator Implements IdGenerator {
  Private AtomicInteger id = new AtomicInteger (0);
  return id.incrementAndget();
  }}
• E.Public class Generator Implements idGenerator {
  private int id = 0;
  return ++id;
  }}

Given: What is the most likely result?

• A.a ConcurrentModification Exception is thrown
• B.size: 5, elements: 11 22 33 44 77
• C.size: 5, elements: 11 22 33 44
• D.size: 4, elements: 11 22 33 44
• E.size: 4, elements: 11 22 33 44 77

Given:

What is the result?

• A.The program runs, but prints no output.
• B.Compilation fails.
• C.Three
• D.One