Oracle Oracle Certifications 1Z0-819 Questions & Answers

• Question 251:

  

  Which is true?

  A. Code compiles but throws a runtime exception when run.

  B. It prints 666.

  C. The code compiles and runs successfully but with a wrong answer (i.e., a bug).

  D. The code does not compile successfully.

  Correct Answer: D

• Question 252:

  Given: What is the result?

  

  A. 2134

  B. 2143

  C. 214

  D. 234

  Correct Answer: D

• Question 253:

  Given:

  

  What is the output?

  A. A compilation error is thrown.

  B. Message from Copier: Attempt00

  C. Message from Abstract Copier: Attempt00

  D. A runtime error is thrown.

  Correct Answer: A

• Question 254:

  Given:

  

  What is the result?

  A. b1

  B. 2

  C. b2

  D. 1

  E. b3

  F. 3

  G. The compilation fails due to an error in line 1.

  Correct Answer: F

  

• Question 255:

  Given:

  

  Which is true about line 1?

  A. If the value is not present, a NoSuchElementException is thrown at run time.

  B. It always executes the System.out::print statement.

  C. If the value is not present, a NullPointerException is thrown at run time.

  D. If the value is not present, nothing is done.

  Correct Answer: D

  

• Question 256:

  Given:

  jdeps -jdkinternals C:\workspace4\SimpleSecurity\jar\classes.jar

  Which describes the expected output?

  A. jdeps lists the module dependencies and the package names of all referenced JDK internal APIs. If any are found, the suggested replacements are output in the console.

  B. jdeps outputs an error message that the -jdkinternals option requires either the - summary or the - verbose options to output to the console.

  C. The -jdkinternals option analyzes all classes in the .jar and prints all class-level dependencies.

  D. The -jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.

  Correct Answer: D

  -jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.

• Question 257:

  Given the code fragment:

  

  What is the result?

  A. A java.lang, UnsupportedOperationException is thrown.

  B. True

  C. False

  D. A java.lang.NullPointerException is thrown.

  Correct Answer: A

• Question 258:

  Given:

  

  Which is true?

  A. The code compiles but does not print any result.

  B. The code prints 25.

  C. The code does not compile.

  D. The code throws an exception at runtime.

  Correct Answer: C

• Question 259:

  Given:

  

  Which two lines inserted in line 1 will allow this code to compile? (Choose two.)

  A. protected void walk(){}

  B. void walk(){}

  C. abstract void walk();

  D. private void walk(){}

  E. public abstract void walk();

  Correct Answer: AE

• Question 260:

  Given:

  

  and

  

  What is the result?

  A. An exception is thrown at runtime.

  B. The compilation fails.

  C. SILVER10

  D. SILVER10 platinum20

  E. SILVER10 PLATINUM20

  Correct Answer: B