Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 1:

  Given the code fragment:

  

  What should be inserted at line n1 so that the code fragment prints Name is required?

  A. name.trim() == '' '' B name, isBlanl ()
  B. name. compareTo('' '') == 0
  C. name.isEmpty
  B. name. compareTo('' '') == 0

• Question 2:

  Given: What is the result?

  

  A. 1.99,2.99,0
  B. 1.99,2.99,0.0
  C. The compilation fails.
  D. 1.99,2.99
  C. The compilation fails.

• Question 3:

  Given:

  

  This code results in a compilation error.

  Which code should be inserted on line 1 for a successful compilation?

  A. Consumer consumer = msg -> { return System.out.print(msg); };
  B. Consumer consumer = var arg > {System.out.print(arg);};
  C. Consumer consumer = (String args) > System.out.print(args);
  D. Consumer consumer = System.out::print;
  D. Consumer consumer = System.out::print;

• Question 4:

  Given:

  

  What is the result?

  A. null
  B. nothing
  C. It fails to compile.
  D. java.lang.IllegalAccessException is thrown.
  E. Student
  C. It fails to compile.

• Question 5:

  Given:

  

  Which three are correct? (Choose three.)

  A. f2.foo(li) prints Hola Mundo!
  B. b1.foo(li) prints Bonjour le monde!
  C. b1.foo(li) prints Hello world!
  D. f1.foo(li) prints Bonjour le monde!
  E. f2.foo(li) prints Hello world!
  F. f2.foo(li) prints Bonjour le monde!
  G. f1.foo(li) prints Hola Mundo!
  H. b1.foo(li) prints Hola Mundo!
  I. f1.foo(li) prints Hello world!
  D. f1.foo(li) prints Bonjour le monde!
  E. f2.foo(li) prints Hello world!
  H. b1.foo(li) prints Hola Mundo!

• Question 6:

  Given:

  

  What is the result?

  A. hey oh hi
  B. yo ey
  C. A compile time error occurs.
  D. oh hi hey
  E. hey oh hi yo ey
  F. hey oh hi ey
  E. hey oh hi yo ey

• Question 7:

  Given: What is the result?

  

  A. WorkingUnknown
  B. Unknown
  C. TuesdayUnknown
  D. The compilation fails.
  E. Tuesday
  F. Working
  B. Unknown

• Question 8:

  Given:

  

  What is the result?

  A. The program prints nothing.
  B. The program prints: 12 and the RuntimeException is thrown.
  C. The program prints: 123 and the RuntimeException is thrown.
  D. The program prints 1234 and a java.lang.IllegalStateException is thrown.
  A. The program prints nothing.

• Question 9:

  Given:

  

  Which two are correct? (Choose two.)

  

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

• Question 10:

  Given TripleThis.java:

  

  Compiling TripleThis.java gives this compiler warning:

  Note: TripleThis.java uses unchecked or unsafe operations.

  Which two replacements done together remove this compiler warning?

  A. Replace line 12 with public static void printValue(Function f, int num) {
  B. Replace line 12 with public static void printValue(Function f, T num) {
  C. Replace line 9 with Function tripler = x --> { return (Integer) x * 3; }
  D. Replace line 12 with public static void printValue(Function f, Integer num) {
  E. Replace line 9 with Function tripler = x -> { return x * 3; }
  A. Replace line 12 with public static void printValue(Function f, int num) {
  D. Replace line 12 with public static void printValue(Function f, Integer num) {