Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 131:

  Given the code fragment:

  

  What is the result?

  A. An ArrayIndexOutofBoundsException is thrown at runtime.
  B. The compilation fails.
  C. gh ij kl
  D. gj hk il
  E. ghi jkl
  A. An ArrayIndexOutofBoundsException is thrown at runtime.

• Question 132:

  Given:

  

  Which would cause s to be AQCD?

  A. s.replace(s.indexOf("A"), s.indexOf("C"), "Q");
  B. s.replace(s.indexOf("B"), s.indexOf("C"), "Q");
  C. s.replace(s.indexOf("B"), s.indexOf("B"), "Q");
  D. s.replace(s.indexOf("A"), s.indexOf("B"), "Q");
  B. s.replace(s.indexOf("B"), s.indexOf("C"), "Q");

• Question 133:

  Given:

  

  Which two lines can replace line 1 so that the Y class compiles? (Choose two.)

  A. map.forEach((k, v) -> set(v)));
  B. set(map.values());
  C. super.set(List map)
  D. super.set(map.values());
  E. set(map)
  B. set(map.values());
  D. super.set(map.values());

• Question 134:

  Given:

  

  Which two statements are valid to be written in this interface? (Choose two.)

  A. public String methodD();
  B. public int x;
  C. final void methodG(){ System.out.println("G"); }
  D. final void methodE();
  E. public abstract void methodB();
  F. public void methodF(){ System.out.println("F") ; }
  G. private abstract void methodC();
  A. public String methodD();
  E. public abstract void methodB();

• Question 135:

  There is a copyServiceAPI that has the org.copyservice. spi. Copy interface To use this service in a module, which module- info.java would be correct?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  C. Option C

• Question 136:

  Which two are valid statements?

  A. BiPredicate test = (final Integer x, var y) -> {x.equals(y)};
  B. BiPredicate test = (Integer x, final var y) -> {x.equals(y)};
  C. BiPredicate test = (var x, final var y) -> {x.equals(y)};
  D. BiPredicate test = (Integer x, final Integer y) -> {x.equals(y)};
  E. BiPredicate test = (final var x, y) -> {x.equals(y)};
  C. BiPredicate test = (var x, final var y) -> {x.equals(y)};
  D. BiPredicate test = (Integer x, final Integer y) -> {x.equals(y)};

• Question 137:

  Given:

  

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

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

• Question 138:

  Given the code fragment:

  

  Which two code fragments, independently, replace line 1 to implement the equivalent reduce operation? (Choose two.)

  A. Integer sum = data.map(a -> a).reduce((a, b) -> a+b);
  B. OptionalInt value = data.mapToInt(a -> a).parallel().reduce(0, (a, b) -> a+b); Integer sum = value.getAsInt();
  C. int s = 0; Integer sum = data.map(a -> a).reduce(0, (a-> a + s));
  D. OptionalInt value = data.mapToInt(a -> a).parallel().reduce((a, b) -> a+b); Integer sum = value.getAsInt();
  E. Integer sum = data.mapToInt(a -> a).reduce(0, (a,b)->a+b));
  D. OptionalInt value = data.mapToInt(a -> a).parallel().reduce((a, b) -> a+b); Integer sum = value.getAsInt();
  E. Integer sum = data.mapToInt(a -> a).reduce(0, (a,b)->a+b));

• Question 139:

  Given the code fragment:

  

  What is the result?

  A. 2
  B. -1
  C. 1
  D. -3
  C. 1

• Question 140:

  Which two statements inserted independently on line 3 will make this code compile?

  A. Return new House();
  B. Return new House();
  C. Return new House () ;
  D. Return new House () ;
  E. Return new House () ;
  A. Return new House();
  C. Return new House () ;