Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 171:

  Given:

  

  Which action will enable the code to compile?

  A. Replace line 6 with BiFunction func = x -> y -> x * y;
  B. Replace line 6 with Function func = x -> y -> x * y;
  C. Replace line 6 with IntFunction func = x -> y -> x * y;
  C. Replace line 6 with IntFunction func = x -> y -> x * y;

• Question 172:

  Given:

  

  Which two independent changes will make the Main class compile? (Choose two.)

  A. Move the entire Student class declaration to a separate Java file, Student.java.
  B. Change line 2 to public Student(String classname).
  C. Change line 1 to public class Student {.
  D. Change line 3 to Student student = new Student("Biology");.
  E. Change line 1 to static class Student {.
  B. Change line 2 to public Student(String classname).
  D. Change line 3 to Student student = new Student("Biology");.

• Question 173:

  Given: Automobile.java

  

  Car.java

  

  What must you do so that the code prints 4?

  A. Remove the parameter from wheels method in line 3.
  B. Add @Override annotation in line 2.
  C. Replace the code in line 2 with Car ob = new Car();
  D. Remove abstract keyword in line 1.
  A. Remove the parameter from wheels method in line 3.

• Question 174:

  Given:

  

  and

  

  Which two method definitions at line n1 in the Bar class compile? (Choose two.)

  A. public List foo(Set m) {...}
  B. public List foo(Set m) {...}
  C. public List foo(TreeSet m) {...}
  D. public List foo(Set m) {...}
  E. public ArrayList foo(Set m) {...}
  F. public ArrayList foo(Set m) {...}
  B. public List foo(Set m) {...}
  C. public List foo(TreeSet m) {...}

• Question 175:

  Given:

  

  Which statement on line 1 enables this code to compile?

  A. Function f = n > n * 2;
  B. Function f = n > n * 2;
  C. Function f = n > n * 2;
  D. Function f = n > n * 2;
  E. Function f = n > n * 2;
  A. Function f = n > n * 2;

• Question 176:

  Which code is correct?

  A. Runnable r = "Message" > System.out.println();
  B. Runnable r = () > System.out::print;
  C. Runnable r = () -> {System.out.println("Message");};
  D. Runnable r = > System.out.println("Message");
  E. Runnable r = {System.out.println("Message")};
  C. Runnable r = () -> {System.out.println("Message");};

• Question 177:

  Which three initialization statements are correct? (Choose three.)

  A. int[][][] e = {{1,1,1},{2,2,2}};
  B. short sh = (short)'A';
  C. float x = 1f;
  D. byte b = 10; char c = b;
  E. String contact# = "(+2) (999) (232)";
  F. int x = 12_34;
  G. boolean false = (4 != 4);
  B. short sh = (short)'A';
  C. float x = 1f;
  F. int x = 12_34;

• Question 178:

  Given:

  

  What is the result?

  A. two
  B. The compilation fails
  C. one
  D. A NumberFormatExcpetion is thrown at runtime.
  A. two

• Question 179:

  Give:

  

  And the code fragment:

  

  Which three code fragments, at line n1 prints SPRING?

  A. System.out.printin (sA(1)};
  B. System.out.printin(Season,values(1)};
  C. System.out.printin(Season.SPRING);
  D. System.out.printin (sa(0)}:
  E. System.out.printin (Season.valueof(`'SPRING").ordinal() );
  F. System.out.printin(Season.valueOf(`'SPRING"). Ordinal() );
  G. System.out.printin (Season.valueof (`s') );
  A. System.out.printin (sA(1)};
  C. System.out.printin(Season.SPRING);
  E. System.out.printin (Season.valueof(`'SPRING").ordinal() );

• Question 180:

  Given:

  

  Which two lines cause compilation errors? (Choose two.)

  A. line 12
  B. line 6
  C. line 9
  D. line 8
  E. line 7
  B. line 6
  E. line 7