최신 1Z0-819 무료덤프 - Oracle Java SE 11 Developer

문제1

Given:

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

A. MyInterface1

B. MyInterface2

C. MyInterface3

D. MyInterface5

E. MyInterface4

정답: B,D

문제2

Given:
jdeps -jdkinternals C:\workspace4\SimpleSecurity\jar\classes.jar
Which describes the expected output?

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

B. 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.

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

D. 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.

정답: B

설명: (DumpTOP 회원만 볼 수 있음)

문제3

Given:

What is the result?

A. [A, B, C]
[ B, C]

B. [A, B, C]
followed by an exception thrown on line 11.

C. On line 9, an exception is thrown at run time.

D. [A, B, C]
[A, B, C]

정답: D

문제4

Given:

Which two allow a.Main to allocate a new Person? (Choose two.)

A. In Line 2, add extends Person to the Main classpublic class Main extends Person {and change Line 3 to create a new Main objectPerson person = new Main();

B. In Line 2, change the access modifier to protectedprotected class Main {

C. In Line 1, remove the access modifierPerson() {

D. In Line 1, change the access modifier to privateprivate Person() {

E. In Line 1, change the access modifier to publicpublic Person() {

정답: A,E

문제5

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.properties

B. MessageBundle.properties

C. MessageBundle_fr_FR.properties

D. MessageBundle_US.properties

E. MessageBundle_en_US.properties

정답: C

문제6

Given TripleThis.java:

Compiling TripleThis.java gives this compiler warning:
Note: TripleThis.java uses unchecked or unsafe operations.
Which two replacements done together remove this compiler warning?

A. Replace line 12 with public static <T> void printValue (Function<T, T> f, T num ) {,

B. Replace line 12 with public static int printValue function<Integer, Integer>, f, T num {.

C. Replace line 12 with public static void printValue function<Integer> f, int num) {.

D. Replace line 9 with function<Integer>, Integer> = X -> { return (integer) x * 3; }.

E. Replace line 9 with function<Integer> tripler = x-> - { return (Integer) X * 3 ; }.

정답: B,E

문제7

Given the code fragment from Box. Java:

Given the code fragment from item.java:

Given the information:
The classes Box and items are encapsulated with getters and setters methods. The classes Box and Item contains required constructors source code.
and the code fragment:

Which action serializes the b1 object?

A. Add SerialVersionID to the Box and item class

B. Remove out.flush () method invocation.

C. Override readObject () and writeObject () method in the Book class.

D. Handle NoteSerilaizeableException in the try clause or throw in the main() method definition.

E. Implement the Serializable interface in the item class.

정답: E

문제8

Given the code fragment:
What is the result?

A. [Kale, Lettuce]
[Salmon, Seabass]

B. [Lettuce, Kale]

C. [Lettuce, Kale]
[Seabass, Salmon]

D. A compilation error is thrown.

정답: D

문제9

Given:

Which statement on line 1 is calling the method of the supplier object correctly?

A. System.out.printin(supplier.test() );

B. System.out.printin(supplier.get() );

C. System.out.printin(supplier.apply() );

D. System.out.printin(supplier.accept() );

정답: B

문제10

Given the content from the course.txt file:

Which code fragment at line 1 prints the lines that contain Java from the course.txt file?
A)

B)

C)

D)

E)

A. Option E

B. Option D

C. Option C

D. Option B

E. Option A

정답: D

문제11

Which two are successful examples of autoboxing? (Choose two.)

A. String a = "A";

B. Float f = 6.0;

C. Float g = Float.valueOf(null);

D. Long c = 23L;

E. Double d = 4;

F. Integer e = 5;

정답: A,F

문제12

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

A. Locale.setDefault(Locale.SIMPLIFIED_CHINESE);

B. Locale.setDefault(Locale.Category.FORMAT, "zh-CN");

C. Locale.setDefault("en_CA");

D. Locale.setDefault(Locale.Category.FORMAT, Locale.CANADA_FRENCH);

E. Locale.setDefault("es", Locale.US);

정답: C,D

문제13

Which code fragment added to line 1 enables the code to compile and print Hello Joe?

A.

B.

C.

D.

정답: C

문제14

Given:

Which two statements are valid to be written in this interface? (Choose two.)

A. public abstract void methodB();

B. public String methodD();

C. private abstract void methodC();

D. public int x;

E. final void methodG(){System.out.println("G");}

F. public void methodF(){System.out.println("F");}

G. final void methodE();

정답: A,B

문제15

Given:

Which code fragment on line 1 makes the m map contain the employee with the highest salary for each neighborhood?

A.

B.

C.

D.

정답: D

문제16

Given:

Which would cause s to be AQCD?

A. s.replace(s.indexOf("B"), s.indexOf("B"), "Q");

B. s.replace(s.indexOf("A"), s.indexOf("B"), "Q");

C. s.replace(s.indexOf("A"), s.indexOf("C"), "Q");

D. s.replace(s.indexOf("B"), s.indexOf("C"), "Q");

정답: D

문제17

Given:

and:

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

A. map(e -> e.getLocality())
.count();

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

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

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

정답: C

문제18

Which is a proper JDBC URL?

A. jdbe.mysql.com://localhost:3306/database

B. jdbc:mysql://localhost:3306/database

C. http://localhost mysql.jdbc:3306/database

D. http://localhost.mysql.com:3306/database

정답: B

최신 1Z0-819 무료덤프 - Oracle Java SE 11 Developer

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