Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 81:

  Which two statements correctly describe capabilities of interfaces and abstract classes? (Choose two.)

  A. Interfaces cannot have protected methods but abstract classes can.
  B. Both interfaces and abstract classes can have final methods.
  C. Interfaces cannot have instance fields but abstract classes can.
  D. Interfaces cannot have static methods but abstract classes can.
  E. Interfaces cannot have methods with bodies but abstract classes can.
  A. Interfaces cannot have protected methods but abstract classes can.
  C. Interfaces cannot have instance fields but abstract classes can.

• Question 82:

  Given the code fragment:

  

  What is the result?

  A. EUR -> 0.84 GBP -> 0.75 USD -> 1.00 CNY -> 6.42
  B. The compilation fails.
  C. CNY -> 6.42 EUR -> 0.84 GBP -> 0.75 USD -> 1.00
  D. USD -> 1.00 GBP -> 0.75 EUR -> 0.84 CNY -> 6.42
  B. The compilation fails.

• Question 83:

  Given:

  

  You want to use the myResource class in a try-with-resources statement. Which change will accomplish this?

  A. Extend AutoCloseable and override the close method.
  B. Implement AutoCloseable and override the autoClose method.
  C. Extend AutoCloseable and override the autoClose method.
  D. Implement AutoCloseable and override the close method.
  D. Implement AutoCloseable and override the close method.

• Question 84:

  Assume ds is a DataSource and the EMP table is defined appropriately.

  

  What does executing this code fragment do?

  A. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', NULL)
  B. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', 'HR')
  C. inserts one row (101, 'SMITH', 'HR')
  D. throws a SQLException
  C. inserts one row (101, 'SMITH', 'HR')

• Question 85:

  Which statement about access modifiers is correct?

  A. An instance variable can be declared with the static modifier.
  B. A local variable can be declared with the final modifier.
  C. An abstract method can be declared with the private modifier.
  D. An inner class cannot be declared with the public modifier.
  E. An interface can be declared with the protected modifier.
  B. A local variable can be declared with the final modifier.

• Question 86:

  Given:

  

  What is the result?

  A. 2134
  B. 2143
  C. 214
  D. 234
  D. 234

• Question 87:

  Which command line runs the main class com.acme.Main from the module com.example?

  A. java --module-path mods com.example/com.acme.Main
  B. java lasspath com.example.jar com.acme.Main
  C. java --module-path mods -m com.example/com.acme.Main
  D. java -classpath com.example.jar com.example/com.acme.Main
  D. java -classpath com.example.jar com.example/com.acme.Main

• Question 88:

  Which is the correct order of possible statements in the structure of a Java class file?

  A. class, package, import
  B. package, import, class
  C. import, package, class
  D. package, class, import
  E. import, class, package
  B. package, import, class

• Question 89:

  Given the code fragment: Which can replace line 11?

  

  A. UnaryOperator uo = (var x ) -> (x * 3);
  B. UnaryOperatoruo = var x -> { return x 3 ; };
  C. UnaryOperatoruo = x -> { return x * 3; };
  D. UnaryOperatoruo = (int x) -> x * 3;
  A. UnaryOperator uo = (var x ) -> (x * 3);

• Question 90:

  Given the code fragment:

  

  What is the result?

  A. 23
  B. 12
  C. 123
  D. 13
  A. 23