Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 91:

  Given:

  

  What is the result?

  A. An exception is thrown at runtime.
  B. 42=(x+y)=42
  C. 42=(x+y)=6
  D. 6=(x+y)=42
  E. 6=(x+y)=6
  D. 6=(x+y)=42

• Question 92:

  Given the code fragment:

  

  What is the result?

  A. 2 4 6 8
  B. 2 4 6 8 10
  C. 1 3 5 7 9 11
  D. 1 3 5 7 9
  A. 2 4 6 8

• Question 93:

  Given:

  public class X {

  }

  and

  public final class Y extends X {

  }

  What is the result of compiling these two classes?

  A. The compilation fails because there is no zero args constructor defined in class X.
  B. The compilation fails because either class X or class Y needs to implement the toString() method.
  C. The compilation fails because a final class cannot extend another class.
  D. The compilation succeeds.
  B. The compilation fails because either class X or class Y needs to implement the toString() method.

• Question 94:

  Given:

  

  What is the result?

  A. 2-4
  B. 0-6 1-5 2-4 C. 1-5
  D. 1-5 2-4
  E. The compilation fails due to an error in line 1.
  F. 0-6
  G. 0-6 2-4
  C

• Question 95:

  Given:

  

  Which two interfaces can be used in lambda expressions? (Choose two.)

  A. MyInterface1
  B. MyInterface3
  C. MyInterface5
  D. MyInterface2
  E. MyInterface4
  A. MyInterface1
  B. MyInterface3

• Question 96:

  Given:

  

  What is the result?

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  E. Option E
  F. Option F
  C. Option C

• Question 97:

  Which two describe reasons to modularize the JDK? (Choose two.)

  A. easier to understand the Java language
  B. improves security and maintainability
  C. easier to expose implementation details
  D. improves application robustness
  E. easier to build a custom runtime linking application modules and JDK modules
  B. improves security and maintainability
  D. improves application robustness

• Question 98:

  Given this requirement:

  Module vehicle depends on module part and makes its com.vehicle package available for all other modules.

  Which module-info.java declaration meets the requirement?

  

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

• Question 99:

  Given the code fragment:

  

  What is the result?

  A. -1 : 2
  B. 2 : -1
  C. 2 : 3
  D. 3 : 0
  B. 2 : -1

• Question 100:

  Which two safely validate inputs? (Choose two.)

  A. Delegate numeric range checking of values to the database.
  B. Accept only valid characters and input values.
  C. Use trusted domain-specific libraries to validate inputs.
  D. Assume inputs have already been validated.
  E. Modify the input values, as needed, to pass validation.
  A. Delegate numeric range checking of values to the database.
  B. Accept only valid characters and input values.