Oracle 1Z0-809 Online Practice Questions and Exam Preparation

Oracle 1Z0-809 Online Questions & Answers

• Question 101:

  Given the code fragment:

  

  What is the result?

  A. A compilation error occurs at line n1.
  B. Checking...
  C. Checking... Checking...
  D. A compilation error occurs at line n2.
  A. A compilation error occurs at line n1.

• Question 102:

  Which two reasons should you use interfaces instead of abstract classes? (Choose two.)

  A. You expect that classes that implement your interfaces have many common methods or fields, or require access modifiers other than public.
  B. You expect that unrelated classes would implement your interfaces.
  C. You want to share code among several closely related classes.
  D. You want to declare non-static on non-final fields.
  E. You want to take advantage of multiple inheritance of type.
  B. You expect that unrelated classes would implement your interfaces.
  E. You want to take advantage of multiple inheritance of type.

• Question 103:

  Given:

  

  and the code fragment:

  

  What is the result?

  A. An exception is thrown at line n2.
  B. 100
  C. A compilation error occurs because the try block is declared without a catch or finally block.
  D. A compilation error occurs at line n1.
  B. 100

• Question 104:

  Given the code fragment:

  

  Which two code fragments, when inserted at line n1 independently, result in the output PEEK: Unix?

  A. .anyMatch ();
  B. .allMatch ();
  C. .findAny ();
  D. .noneMatch ();
  E. .findFirst ();
  C. .findAny ();
  E. .findFirst ();

• Question 105:

  Given:

  

  Which two interfaces can you use to create lambda expressions? (Choose two.)

  A. T
  B. R
  C. P
  D. S
  E. Q
  F. U
  C. P
  D. S

• Question 106:

  Given:

  

  and the code fragment:

  

  What is the result?

  A. [Java EE: Helen:Houston] [Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
  B. Java EE Java ME
  C. [Java ME: Jessy:Chicago, Java ME: Mark:Chicago] [Java EE: Helen:Houston]
  D. A compilation error occurs.
  D. A compilation error occurs.

• Question 107:

  Given the code fragment:

  

  Assume that:

  The required database driver is configured in the classpath.

  The appropriate database is accessible with the dbURL, userName, and passWord exists. The Employee and Customer tables are available and each table has id column with a few records and the SQL queries are valid.

  What is the result of compiling and executing this code fragment?

  A. The program prints employee IDs.
  B. The program prints customer IDs.
  C. The program prints Exception.
  D. compilation fails on line 13.
  C. The program prints Exception.

• Question 108:

  Given:

  

  and the command: java Product 0 What is the result?

  A. An AssertionError is thrown.
  B. A compilation error occurs at line n1.
  C. New Price: 0.0
  D. A NumberFormatException is thrown at run time.
  C. New Price: 0.0

• Question 109:

  You have been asked to create a ResourceBundle which uses a properties file to localize an application. Which code example specifies valid keys of menu1 and menu2 with values of File Menu and View Menu?

  A. View Menu
  B. menu1File Menu menu2View Menu
  C. menu1, File Menu, menu2, View Menu Menu
  D. menu1 = File Menu menu2 = View Menu
  D. menu1 = File Menu menu2 = View Menu

• Question 110:

  Given the code fragment:

  

  Which should be inserted into line n1 to print Average = 2.5?

  A. IntStream str = Stream.of (1, 2, 3, 4);
  B. IntStream str = IntStream.of (1, 2, 3, 4);
  C. DoubleStream str = Stream.of (1.0, 2.0, 3.0, 4.0);
  D. Stream str = Stream.of (1, 2, 3, 4);
  C. DoubleStream str = Stream.of (1.0, 2.0, 3.0, 4.0);