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Reference: https://education.oracle.com/java-se-11-developer/pexam_1Z0-819?intcmp=WWOUBLOGPOSTLADJAVA082913
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Oracle 1Z0-819日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Lambda Expressions and Streams | 12-18% | - Define and use functional interfaces and lambda expressions - Use Optional class and primitive type streams - Create and use stream pipelines, including intermediate and terminal operations |
| Topic 2: Java I/O and NIO.2 | 8-12% | - Implement serialization and deserialization - Read and write data using streams, readers, writers and channels - Manage files, directories and file attributes with java.nio.file API |
| Topic 3: Working with Java Data Types | 10-15% | - Use primitives and wrapper classes, including operators, parentheses, type promotion and casting - Handle text using String, StringBuilder and StringBuffer classes - Manipulate numeric values and formatting |
| Topic 4: Exception Handling and Assertions | 8-12% | - Use assertions appropriately - Create custom exceptions and use standard exceptions - Use try-catch-finally, try-with-resources, throw and throws |
| Topic 5: Java Platform Module System | 8-12% | - Define modules, module declarations, requires, exports, opens, uses and provides - Compile, package and run modular applications - Use automatic modules and unnamed modules |
| Topic 6: Secure Coding and Localization | 5-8% | - Apply secure coding practices, input validation and data protection - Use Locale, ResourceBundle and formatting APIs for internationalization |
| Topic 7: Concurrency | 8-12% | - Use synchronization, locks, atomic variables and concurrent collections - Create and manage threads, use ExecutorService, Callable and Future - Use parallel streams and CompletableFuture |
| Topic 8: Java Object-Oriented Approach | 15-20% | - Overload and override methods, use constructors and initializers - Declare and instantiate classes, interfaces, abstract classes and nested classes - Apply encapsulation, inheritance, polymorphism and abstraction - Use local variable type inference |
| Topic 9: JDBC Database Access | 5-8% | - Connect to databases, execute queries and updates - Process result sets, manage transactions and resources |
| Topic 10: Arrays and Collections | 12-18% | - Sort and search collections and arrays - Create and manipulate arrays, lists, sets, maps, queues and deques - Use generics, wildcards and diamond notation |
Oracle Java SE 11 Developer (1Z0-819日本語版) Sample Questions:
与えられた条件:
Y クラスがコンパイルされるように 1 行目を置き換えることができる 2 行はどれですか。(2 つ選択してください。)
- A. map.forEach((k, v) -> set(v)));
- B. super.set(リスト<文字列>マップ)
- C. super.set(map.values());
- D. map.values() を設定します。
- E. set(map)
Correct Answer: C,D 🗳️
書店の売上は、顧客の名前と購入した書籍が入力された Sale オブジェクトのリストで表されます。
パブリッククラスセール{
プライベート文字列顧客;
プライベート List<Book> アイテム;
// コンストラクタ、セッター、ゲッターは表示されません
}
パブリッククラス Book {
プライベート文字列名;
プライベートダブル価格;
// コンストラクタ、セッター、ゲッターは表示されません
}
Sale オブジェクトのリスト tList が与えられた場合、どのコード フラグメントが各顧客の合計売上を昇順でリストに作成しますか。
- A. オプションB
- B. オプションA
- C. オプションD
- D. オプションC
Correct Answer: D 🗳️
ユーザーの資格情報が正しいと仮定すると、どの式によって接続が作成されますか?
- A.
- B.
- C.
- D.
- E.
Correct Answer: B 🗳️
Java が動的である理由は何ですか?
- A. 実行時に、クラスは必要に応じてロードされ、新しいコード モジュールはオンデマンドでロードできます。
- B. Java コンパイラはリフレクションを使用して、クラス メソッドがターゲット プラットフォームのリソースによってサポートされているかどうかをテストします。
- C. Java コンパイラは、特定のターゲット プラットフォームで実行するためにクラスを前処理します。
- D. ランタイムは、マシン言語ソースだけでなく、さまざまな言語コンパイラからの実行可能ファイルも処理できます。
Correct Answer: A 🗳️
モジュラー JDK について正しい記述はどれですか (2 つ選択してください)。
- A. JDK がモジュール化されたため、API はより積極的に非推奨になります。
- B. アプリケーションは、モジュラー JDK 上で実行するためにモジュールとして構造化する必要があります。
- C. Java SE プラットフォームの基本 API は、java.base モジュールにあります。
- D. コマンドラインからモジュールのエクスポートを構成することは可能ですが、望ましくありません。
Correct Answer: C,D 🗳️
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