Oracle Oracle Certifications 1Z0-819 Questions & Answers

• Question 211:

  Given:

  

  What will secure this code from a potential Denial of Service condition?

  A. After Line 4, add indexReader.close().

  B. On Line 3, enclose processData(dataReader) with try with resources.

  C. After Line 3, add dataReader.close().

  D. On Line 1, use try with resources when opening each dataReader.

  E. Before Line 1, check the size of dataFiles to make sure it does not exceed a threshold.

  Correct Answer: B

• Question 212:

  Given the code fragment: What is the result?

  

  A. 1

  B. The compilation fails at line

  C. 10

  D. The compilation fails at line 16.

  E. The compilation fails at line 13.

  Correct Answer: E

• Question 213:

  Which two expressions create a valid Java Path instance? (Choose two.)

  A. Paths.get("foo")

  B. Paths.getPath("too")

  C. Path.get(new URI("file:///domains/oracle/test.txt"))

  D. new Path("foo")

  E. Paths.get(URL.create("file:///domains/oracle/test.txt"))

  Correct Answer: AE

• Question 214:

  Given:

  

  What is the expected result of javac?

  A. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: package java does not exist

  B. javac compiles Mycar.java without errors or warnings.

  C. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: expected import java.lang

  D. javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class

  Correct Answer: B

• Question 215:

  Given:

  

  and:

  

  Which code, when inserted on line 10, prints the number of unique localities from the roster list?

  A. .map(Employee::getLocality) .distinct() .count();

  B. map(e > e.getLocality()) .count();

  C. .map(e > e.getLocality()) .collect(Collectors.toSet()) .count();

  D. .filter(Employee::getLocality) .distinct() .count();

  Correct Answer: D

  Reference: https://developer.android.com/reference/android/location/Address

• Question 216:

  Given: Which three are correct? (Choose three.)

  

  A. f2.foo(li) prints Hola Mundo!

  B. b1.foo(li) prints Bonjour le monde!

  C. b1.foo(li) prints Hello world!

  D. f1.foo(li) prints Bonjour le monde!

  E. f2.foo(li) prints Hello world!

  F. f2.foo(li) prints Bonjour le monde!

  G. f1.foo(li) prints Hola Mundo!

  H. b1.foo(li) prints Hola Mundo!

  I. f1.foo(li) prints Hello world!

  Correct Answer: DEH

• Question 217:

  Given:

  

  What is the result?

  A. The compilation fails.

  B. Y@<< hashcode>>

  C. Null

  D. HH

  Correct Answer: B

• Question 218:

  Given:

  

  What is the result?

  A. Orange Juice

  B. The compilation fails.

  C. Orange Juice Apple Pie Lemmon Ice Raspberry Tart

  D. The program prints nothing.

  Correct Answer: C

  

• Question 219:

  Given:

  

  What is the type of x?

  A. char

  B. List

  C. String

  D. List

  Correct Answer: C

• Question 220:

  Given:

  

  Which three actions implement Java SE security guidelines? (Choose three.)

  A. Change line 7 to return names.clone();.

  B. Change line 4 to this.names = names.clone();.

  C. Change the getNames() method name to get$Names().

  D. Change line 6 to public synchronized String[] getNames() {.

  E. Change line 2 to private final String[] names;.

  F. Change line 3 to private Secret(String[] names) {.

  G. Change line 2 to protected volatile String[] names;.

  Correct Answer: EFG