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Oracle 1z0-809日本語 Exam Syllabus Topics:

SectionObjectives
Java File I/O- NIO.2 API
  • 1. Read file attributes
  • 2. Traverse directory structures
  • 3. Use Path and Files classes
Building Database Applications with JDBC- Database connectivity
  • 1. Use JDBC drivers and connections
  • 2. Execute SQL statements
  • 3. Process ResultSet data
Java Concurrency- Multithreading
  • 1. Use synchronized blocks and locks
  • 2. Create and manage threads
  • 3. Use concurrent collections
  • 4. Use ExecutorService
Java SE 8 Date/Time API- Date and time handling
  • 1. Use LocalDate, LocalTime, and LocalDateTime
  • 2. Use Period and Duration
  • 3. Format and parse date values
Exceptions and Assertions- Error handling
  • 1. Use assertions
  • 2. Create custom exceptions
  • 3. Use try-catch and try-with-resources
Java Class Design- Object-oriented principles
  • 1. Override equals, hashCode, and toString
  • 2. Implement inheritance and polymorphism
  • 3. Implement encapsulation
  • 4. Create singleton and immutable classes
  • 5. Use static variables, methods, and initialization blocks
Localization- Internationalization
  • 1. Handle localization properties
  • 2. Use Locale and ResourceBundle
  • 3. Format dates and numbers
Java I/O Fundamentals- Input and output
  • 1. Use serialization
  • 2. Read and write files
  • 3. Use BufferedReader and BufferedWriter
Advanced Java Class Design- Advanced object-oriented features
  • 1. Create nested and inner classes
  • 2. Use the final keyword
  • 3. Use abstract classes and interfaces
  • 4. Use enum types
  • 5. Develop Lambda expressions
Java Stream API- Stream processing
  • 1. Collect and group stream results
  • 2. Sort and filter data using streams
  • 3. Use Optional
  • 4. Use findFirst, findAny, and match methods
  • 5. Use map, flatMap, and peek
Generics and Collections- Collections framework
  • 1. Use Comparator and Comparable
  • 2. Use ArrayList, TreeSet, TreeMap, and ArrayDeque
  • 3. Iterate collections with Streams and forEach
  • 4. Create and use generic classes
Lambda Built-in Functional Interfaces- Functional programming
  • 1. Use UnaryOperator and BinaryOperator
  • 2. Use Predicate, Consumer, Function, and Supplier
  • 3. Use primitive functional interfaces

Oracle Java SE 8 Programmer II (1z0-809日本語版) Exam FAQ — Brand-New Answers

The Oracle Java SE 8 Programmer II (1z0-809日本語版) blueprint spans 12 domains — including Localization, Generics and Collections, Lambda Built-in Functional Interfaces. Work the domains in order of weight; the complete outline above lists every subtopic.

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The Oracle Java SE 8 Programmer II (1z0-809日本語版) is Oracle's certification exam for Java SE, at the Professional level. It's harder than a driver's license test — but brand-new learning ways make it manageable. Related credentials include Oracle Certified Professional, Java SE 8 Programmer.

Candidates must first pass Oracle Certified Associate Java SE 8 Programmer (1Z0-808). Eligibility rules change over time, so verify the current requirements on the official page (official 1z0-809日本語 exam page) before registering.

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Oracle Java SE 8 Programmer II (1z0-809日本語版) Sample Questions:

Question #1

与えられた:
class Book {
int id;
String name;
public Book (int id, String name) {
this.id = id;
this.name = name;
}
public boolean equals (Object obj) { //line n1
boolean output = false;
Book b = (Book) obj;
if (this.id = = b.id) {
output = true;
}
return output;
}
}
and the code fragment:
Book b1 = new Book (101, "Java Programing");
Book b2 = new Book (102, "Java Programing");
System.out.println (b1.equals(b2)); //line n2
どの文が真実ですか?

  • A. プログラムはtrueを出力します。
  • B. A compilation error occurs. To ensure successful compilation, replace line n2 with:System.out.println (b1.equals((Object) b2));
  • C. コンパイルエラーが発生します。To ensure successful compilation, replace line n1 with:boolean equals (Book obj) {
  • D. プログラムはfalseを出力します。
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Question #2

このコードを考えると、

このクラスがインスタンス化されテストされた後、正しい 2 つはどれですか?

  • A. i の値が 5 に設定されている場合、j の値は 1 になります。
  • B. i の値が 8 に設定されている場合、j の値は任意の整数値になります。
  • C. i の値が 3 のままであれば、j の値は 9 のままになります。
  • D. j の値が 5 に設定されている場合、i の値は 15 になります。
  • E. i の値が 6 に設定されている場合、j の値は 18 になります。
  • F. j の値が 15 に設定されている場合、i の値は任意の整数値になります。
Reveal Solution  Discussion  0

Correct Answer: A,D  🗳️

Question #3

コードの断片を考えると:
List<String> codes = Arrays.asList ("DOC", "MPEG", "JPEG");
codes.forEach (c -> System.out.print(c + " "));
String fmt = codes.stream()
.filter (s-> s.contains ("PEG"))
.reduce((s, t) -> s + t).get();
System.out.println("\n" + fmt);
What is the result?

  • A. The order of the output is unpredictable.
  • B. DOC MPEG MPEGJPEG
    MPEGMPEGJPEG
  • C. hat is the result?DOC MPEG JPEG
    MPEGJPEG
  • D. MPEGJPEG
    MPEGJPEG
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Question #4

与えられた:
class FuelNotAvailException extends Exception { }
class Vehicle {
void ride() throws FuelNotAvailException {//line n1
System.out.println("Happy Journey!");
}
}
class SolarVehicle extends Vehicle {
public void ride () throws FuelNotAvailException {//line n2
super ride ();
}
}
そしてコードの断片:
public static void main (String[] args) throws Exception {
Vehicle v = new SolarVehicle ();
v.ride();
}
どの変更により、コードフラグメントはHappy Journey !?を出力できますか?

  • A. Replace line n2 with private void ride() throws FuelNotAvailException {
  • B. Replace line n1 with public void ride() throws FuelNotAvailException {
  • C. Replace line n2 with void ride() throws Exception {
  • D. Replace line n1 with protected void ride() throws Exception {
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Question #5

与えられた条件:

関数インターフェースを使用してリファクタリングされたコードはどれですか?

  • A.
  • B.
  • C.
  • D.
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

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