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Oracle 1Z0-819日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Annotations | 5% | - Create custom annotations - Apply standard annotations to classes and methods - Describe the purpose of annotations |
| I/O (Fundamentals and NIO2) | 7% | - Read and write console and file input/output using Java I/O system - Use NIO2 API to work with file systems and file attributes - Use Path interface to manipulate file paths - Use Stream API with files |
| Exception Handling and Localization | 10% | - Use standard exception classes - Create try-catch blocks and understand exception propagation - Create and throw custom exceptions - Use resource bundles and locale classes for internationalization - Describe the advantages of exception handling - Use assertions |
| Java Platform Module System | 10% | - Declare module dependencies - Migrate applications to use modules - Use jdeps to determine dependencies - Explain the default modules and class path - Deploy and execute modules - Explain the concept of module exports and requires |
| Database Applications with JDBC | 5% | - Use parameterized queries - Connect to a database using JDBC - Describe the advantages of using a connection pool - Execute queries and process results |
| Working with Streams and Lambda expressions | 13% | - Use the Stream API to perform terminal operations - Perform decomposition using the reduce(), collect(), partition(), and groupingBy() methods - Use method references with streams - Describe the Stream interface and pipeline - Use functional interfaces with lambda expressions - Filter a collection using lambda expressions |
| Working with Java OOP | 15% | - Implement polymorphism - Create inner classes and use them within other classes - Apply the final keyword to classes, methods, and fields - Use abstract classes and interfaces - Implement inheritance - Apply the static keyword to methods and fields - Implement encapsulation |
| Working with Java data types | 12% | - Explain an object's lifecycle (creation, dereferencing via garbage collection) - Manipulate data using the StringBuilder class and its methods - Create and manipulate strings - Read or write to object fields - Call methods on objects - Declare and initialize variables - Differentiate between object reference variables and primitive variables |
| Working with Arrays and Collections | 8% | - Search for elements in a collection - Use generic types and diamond operator - Iterate through a collection - Sort elements in a collection - Create a list, set, map, or queue collection - Filter a collection using lambda expressions |
| Concurrency | 10% | - Create worker threads using Runnable and Thread objects - Identify potential threading problems - Use synchronized blocks and the volatile keyword - Use parallel streams to improve performance - Use java.util.concurrent atomic classes and ForkJoinPool - Use ExecutorService to concurrently execute tasks |
| Secure Coding in Java SE Application | 5% | - Secure sensitive data - Prevent SQL injection and other attacks - Validate user input - Prevent Denial of Service (DoS) attacks |
| Controlling Program Flow | 10% | - Use for, while, and do/while loops - Use switch statements - Use if and if/else statements - Use Java control statements - Use break and continue statements |
1Z0-819日本語 Exam FAQ — Convenience, Quality, Policy
The official Oracle Java SE 11 Developer (1Z0-819日本語版) outline defines 12 domains. The leading three are Java Platform Module System (10%), Working with Streams and Lambda expressions (13%), and Database Applications with JDBC (5%). The full list is in the topics section above, and ExamCost's 297 practice questions cover each one.
Oracle recommends but does not require candidates to first obtain the Oracle Certified Professional: Java SE 11 Programmer I (1Z0-815) certification. However, 1Z0-819 can be taken directly without 1Z0-815. Since requirements change over time, confirm the latest on the official Oracle exam page before scheduling.
The Oracle Java SE 11 Developer (1Z0-819日本語版) exam contains 80 to complete within 90 minutes. Timed simulation in the ExamCost Desktop Test Engine teaches that rhythm before exam day does.
Oracle recommends these training resources for the Oracle Java SE 11 Developer (1Z0-819日本語版) exam:
Follow the training with steady self-testing — the 297 practice questions from ExamCost help you apply theory and fill any gaps the training leaves.
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The 1Z0-819日本語 exam is a Oracle certification exam validating the Oracle Java SE 11 Developer (1Z0-819日本語版) syllabus shown above. It belongs to these credential paths: Oracle Certified Professional: Java SE 11 Developer. Candidates in 2026 start with ExamCost's 297 practice questions, available as a printable PDF, a Windows Desktop Test Engine, and an Online Test Engine — three versions of the same materials.
The Oracle Java SE 11 Developer (1Z0-819日本語版) exam requires 68% to pass, and registration costs $245 USD. A failed attempt means paying the same fee again — a readiness check with the ExamCost engines before booking is the cheaper option.
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Oracle Java SE 11 Developer (1Z0-819日本語版) Sample Questions:
与えられた条件:
そして
1 行目のどのコードフラグメントにより、s1 セットに 1989 年 1 月 1 日より前に生まれたすべての従業員の名前が含まれるようになりますか?
- A. オプションD
- B. オプションC
- C. オプションA
- D. オプションB
Correct Answer: D 🗳️
ある企業には、次のパッケージを含む Java 8 jar ファイルを使用した既存の販売アプリケーションがあります。
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
この jar ファイルを顧客、売上、注文の 3 つのモジュールにモジュール化するには、どの module-info.java が正しいでしょうか?
- A.
- B.
- C.
- D.
Correct Answer: A 🗳️
与えられた条件:
結果はどうなりましたか？
- A. SomeClass#methodA()SomeClass#methodA()
- B. 別のクラス#メソッドA()別のクラス#メソッドA()
- C. 別のクラス#メソッドA() あるクラス#メソッドA()
- D. SomeClass#methodA()AnotherClass#methodA()
- E. コンパイルに失敗しました。
- F. 実行時に ClassCastException がスローされます。
Correct Answer: E 🗳️
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与えられた条件:
出力は何ですか?
A)
B)
C)
D)
- A. オプションD
- B. オプションC
- C. オプションA
- D. オプションB
Correct Answer: A 🗳️
次のコードフラグメントがあるとします:
どのコードフラグメントが for ステートメントを置き換えますか?
- A. intstream.rangeclosed(l, 100).mapToObj{FizzBuzz::convert).forEach(System.out::printIn);
- B. IntStream.rangeClosed(l, 100).map(FizzBuzz::convert).forEach(System.out::println);
- C. IntStream.ranged、100).map(FizzBuzz::convert).forEach(System.out::println);
- D. IntStream.range(1, 100).mapToObj(FizzBuzz::convert).forEach(System.out::println);
Correct Answer: B 🗳️
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