Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 181:

  Which two var declarations are correct? (Choose two.)

  A. var names = new ArrayList();
  B. var _ = 100;
  C. var var = "hello";
  D. var y = null;
  E. var a;
  A. var names = new ArrayList();
  C. var var = "hello";

• Question 182:

  Given: What is the result?

  

  A. It throws a runtime exception.
  B. Value of Euler = 2.71828
  C. The code does not compile.
  D. Value of Euler = "2.71828"
  C. The code does not compile.

• Question 183:

  Given:

  

  and checkQuality(QUALITY.A); and

  

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

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

• Question 184:

  What is the result?

  

  A. 357
  B. 35
  C. 235
  D. 2357
  E. An ArrayIndexOutOfBoundsException is thrown at runtime.
  A. 357

• Question 185:

  Given:

  

  Which two methods facilitate valid ways to read instance fields? (Choose two.)

  A. getTCount
  B. getACount
  C. getTotalCount
  D. getCCount
  E. getGCount
  A. getTCount
  C. getTotalCount

• Question 186:

  Given:

  

  Which statement is true about the Fox class?

  A. Fox class does not have to override inhabit method, so long as it does not try to call it.
  B. Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.
  C. Fox class must implement either Forest or Town interfaces, but not both.
  D. The inhabit method implementation from the first interface that Fox implements will take precedence.
  E. Fox class must provide implementation for the inhabit method.
  B. Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.

• Question 187:

  Given:

  

  Which is true?

  A. System.out is the standard output stream. The stream is open only when System.out is called.
  B. System.in cannot reassign the other stream.
  C. System.out is an instance of java.io.OutputStream by default.
  D. System.in is the standard input stream. The stream is already open.
  D. System.in is the standard input stream. The stream is already open.

• Question 188:

  Given the code fragment from Box.java:

  

  Given the code fragment from Item.java:

  

  Given the information:

  1.

  The classes Box and Item are encapsulated with getters and setters methods.

  2.

  The classes Box and Item contains required constructors source code. and the code fragment:

  

  Which action serializes the b1 object?

  A. Handle NotSerializableException in the try clause or throw in the main() method definition.
  B. Add SerialVersionUID to the Box and Item class.
  C. Implement the Serializable interface in the Item class.
  D. Override readObject() and writeObject() methods in the Book class.
  E. Remove out.flush() method invocation.
  C. Implement the Serializable interface in the Item class.

• Question 189:

  Which two are functional interfaces? (Choose two.)

  

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

• Question 190:

  Given the code fragment:

  Supplier supplier = () -> "Hello World":

  // line 1

  Which statement on line 1 is calling the method of the supplier object correctly?

  A. System.out.println(supplier.apply())
  B. System.out.println(supplier.accept());
  C. System.out.println(supplier.get());
  D. System.out.println(supplier.test());
  C. System.out.println(supplier.get());