Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 111:

  Given:

  

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

  A. public List foo(Set m) { ... }
  B. public ArrayList foo(Set m) { ... }
  C. public List foo(TreeSet m) { ... }
  D. public List foo(Set m) { ... }
  E. public List foo(Set m) { ... }
  F. public ArrayList foo(Set m) { ... }
  B. public ArrayList foo(Set m) { ... }
  C. public List foo(TreeSet m) { ... }

• Question 112:

  Given:

  

  Why does D cause a compilation error?

  A. D inherits a() only from C.
  B. D inherits a() from B and C but the return types are incompatible.
  C. D extends more than one interface.
  D. D does not define any method.
  B. D inherits a() from B and C but the return types are incompatible.

• Question 113:

  Given:

  

  executed with this command: java Main one two three What is the output of this class?

  A. The compilation fails.
  B. 1) one 2) two 3) three
  C. A java.lang.ArrayIndexOutOfBoundsException is thrown.
  D. 1) one
  E. nothing
  B. 1) one 2) two 3) three

• Question 114:

  Given the content from lines.txt: C C++ Java Go Kotlin

  and

  

  What is the result?

  A. C C++ Go Kotlin
  B. JAVA
  C. C C++ GO KOTLIN
  D. C C++ JAVA GO KOTLIN
  D. C C++ JAVA GO KOTLIN

• Question 115:

  Which module is required for any application using Swing or AWT?

  A. java.desktop
  B. java.prefs
  C. java.se
  D. java.logging
  E. java.rmi
  A. java.desktop

• Question 116:

  Which two statements set the default locale used for formatting numbers, currency, and percentages? (Choose two.)

  A. Locale.setDefault(Locale.Category.FORMAT, "zh-CN");
  B. Locale.setDefault(Locale.Category.FORMAT, Locale.CANADA_FRENCH);
  C. Locale.setDefault(Locale.SIMPLIFIED_CHINESE);
  D. Locale.setDefault("en_CA");
  E. Locale.setDefault("es", Locale.US);
  B. Locale.setDefault(Locale.Category.FORMAT, Locale.CANADA_FRENCH);
  D. Locale.setDefault("en_CA");

• Question 117:

  Given the code fragment:

  

  Which "for" loop produces the same output?

  

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

• Question 118:

  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;.
  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;.

• Question 119:

  Given the contents:

  MessageBundle.properties file:

  message=Hello

  MessageBundle_en.properties file:

  message=Hello (en)

  MessageBundle_US.properties file:

  message=Hello (US)

  MessageBundle_en_US.properties file:

  message=Hello (en_US)

  MessageBundle_fr_FR.properties file:

  message=Bonjour

  and the code fragment:

  Locale.setDefault(Locale.FRANCE);

  Locale currentLocale = new Locale.Builder().setLanguage("en").build(); ResourceBundle messages = ResourceBundle.getBundle("MessageBundle", currentLocale);

  System.out. println(messages.getString("message"));

  Which file will display the content on executing the code fragment?

  A. MessageBundle_en_US.properties
  B. MessageBundle_en.properties
  C. MessageBundle_fr_FR.properties
  D. MessageBundle_US.properties
  E. MessageBundle.properties
  C. MessageBundle_fr_FR.properties

• Question 120:

  Given:

  

  Which three are true? (Choose three.)

  A. f1.foo(c) prints Hello world!
  B. f1.foo(c) prints Bonjour le monde!
  C. f2.foo(c) prints Bonjour le monde!
  D. f2.foo(c) prints Hello world!
  E. b1.foo(c) prints Bonjour le monde!
  F. b1.foo(c) prints Hello world!
  C. f2.foo(c) prints Bonjour le monde!
  F. b1.foo(c) prints Hello world!