Free Oracle 1Z0-819 Exam Dumps Questions & Answers

Which code fragment added to line 1 enables the code to compile and print Hello Joe?

• A. 
• B. 
• C. 
• D. 

Which two are functional interfaces? (Choose two.)

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

Given:

and

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

• A.  public List<Integer> foo(TreeSet<String> m) {...}
• B.  public List<Object> foo(Set<CharSequence> m) {...}
• C.  public ArrayList<Number> foo(Set<CharSequence> m) {...}
• D.  public List<Number> foo(Set<String> m) {...}
• E.  public List<Integer> foo(Set<CharSequence> m) {...}
• F.  public ArrayList<Integer> foo(Set<String> m) {...}

Given:

Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)

• A.  public List<Integer> foo(TreeSet<String> m) { ... }
• B.  public ArrayList<Number> foo(Set<CharSequence> m) { ... }
• C.  public List<Integer> foo(Set<String> m) { ... }
• D.  public List<Integer> foo(Set<CharSequence> m) { ... }
• E.  public List<Object> foo(Set<CharSequence> m) { ... }
• F.  public ArrayList<Integer> foo(Set<String> m) { ... }

Which statement about a functional interface is true?

• A.  It must be annotated with @FunctionalInterface.
• B.  It must be defined with the public access modifier.
• C.  It is declared with a single default method.
• D.  It cannot have any private methods and static methods.
• E.  It is declared with a single abstract method.