Oracle Oracle Certifications 1Z0-819 Questions & Answers

• Question 111:

  Given:

  

  Which two are correct? (Choose two.)

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: CD

• Question 112:

  Given:

  

  What is the result?

  A. 2134

  B. 234

  C. 2341

  D. 214

  Correct Answer: B

• Question 113:

  Given:

  

  What is the result?

  A. watermelon orange lemon grape apricot apple

  B. nothing

  C. apple apricot grape lemon orange watermelon

  D. apple orange grape lemon apricot watermelon

  Correct Answer: A

  

• Question 114:

  Given:

  

  What is the result?

  A. Map: 0 Keys: 0 Values: 0

  B. The compilation fails.

  C. Map: 4 Keys: 4 Values: 4

  D. Map: 4 Keys: 0 Values: 0

  E. Map: 0 Keys: 4 Values: 4

  Correct Answer: D

  

• Question 115:

  Given:

  

  What is the correct definition of the JsonField annotation that makes the Point class compile?

  

  A. Option A

  B. Option B

  C. Option C

  Correct Answer: A

• Question 116:

  Which code fragment does a service use to load the service provider with a Print interface?

  A. private Print print = com.service.Provider.getInstance();

  B. private java.util.ServiceLoader loader = ServiceLoader.load (Print.class);

  C. private java.util.ServiceLoader loader = new java.util.ServiceLoader<> ();

  D. private Print print = new com.service.Provider.PrintImpl();

  Correct Answer: B

  Reference: https://docs.oracle.com/javase/8/docs/api/?java/util/ServiceLoader.html

• Question 117:

  Given the code fragment:

  

  Which two code snippets inserted independently inside println method print Mondial:domainmodel? (Choose two.)

  A. Main.prefix + Main.name

  B. prefix + getName

  C. Main.prefix + Main.getName()

  D. new Main().prefix + new Main().name

  E. prefix + name

  F. prefix + Main.name

  Correct Answer: CD

• Question 118:

  Given:

  

  Which two statements are true if the method is added to Bar? (Choose two.)

  A. public Collection foo(Collection arg) { ... } overrides Foo.foo.

  B. public Collection foo(Stream arg) { ... } overloads Foo.foo.

  C. public List foo(Collection arg) { ... } overrides Foo.foo.

  D. public Collection foo(Collection arg) { ... } overloads Foo.foo.

  E. public Collection bar(Collection arg) { ... } overloads Foo.foo.

  F. public Iterable foo(Collection arg) { ... } overrides Foo.foo.

  Correct Answer: CF

• Question 119:

  Given:

  

  What is the result?

  A. 5 4 3 2 1

  B. 5

  C. nothing

  D. 5 4 3 2 1 4 3 2 1 3 2 1 2 1 1

  Correct Answer: D

• Question 120:

  Which describes an aspect of Java that contributes to high performance?

  A. Java prioritizes garbage collection.

  B. Java has a library of built-in functions that can be used to enable pipeline burst execution.

  C. Java monitors and optimizes code that is frequently executed.

  D. Java automatically parallelizes code execution.

  Correct Answer: C