Oracle 1z1-819-JPN - Java SE 11 Developer (1Z0-819日本語版)
Updated: Oct 15, 2026
Q & A: 297 Questions and Answers
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Updated: Oct 15, 2026
Q & A: 297 Questions and Answers
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Java SE 11 Developer Exam Number: 1Z0-819 is a fundamental exam. Successful completion by candidates will allow them to achieve Oracle Certified Professional: Java SE 11 Developer.
Reference: https://education.oracle.com/java-se-11-developer/pexam_1Z0-819?intcmp=WWOUBLOGPOSTLADJAVA082913
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| Section | Weight | Objectives |
|---|---|---|
| Secure Coding in Java SE Application | 5% | - Prevent Denial of Service (DoS) attacks - Secure sensitive data - Prevent SQL injection and other attacks - Validate user input |
| Working with Streams and Lambda expressions | 13% | - Filter a collection using lambda expressions - Use functional interfaces with lambda expressions - Describe the Stream interface and pipeline - Use method references with streams - Use the Stream API to perform terminal operations - Perform decomposition using the reduce(), collect(), partition(), and groupingBy() methods |
| Annotations | 5% | - Describe the purpose of annotations - Apply standard annotations to classes and methods - Create custom annotations |
| Working with Java OOP | 15% | - Use abstract classes and interfaces - Apply the static keyword to methods and fields - Implement inheritance - Create inner classes and use them within other classes - Apply the final keyword to classes, methods, and fields - Implement polymorphism - Implement encapsulation |
| Controlling Program Flow | 10% | - Use switch statements - Use Java control statements - Use if and if/else statements - Use break and continue statements - Use for, while, and do/while loops |
| Concurrency | 10% | - Use ExecutorService to concurrently execute tasks - Use java.util.concurrent atomic classes and ForkJoinPool - Use synchronized blocks and the volatile keyword - Use parallel streams to improve performance - Create worker threads using Runnable and Thread objects - Identify potential threading problems |
| Java Platform Module System | 10% | - Deploy and execute modules - Explain the concept of module exports and requires - Explain the default modules and class path - Declare module dependencies - Migrate applications to use modules - Use jdeps to determine dependencies |
| I/O (Fundamentals and NIO2) | 7% | - Read and write console and file input/output using Java I/O system - Use Path interface to manipulate file paths - Use NIO2 API to work with file systems and file attributes - Use Stream API with files |
| Working with Java data types | 12% | - Declare and initialize variables - Manipulate data using the StringBuilder class and its methods - Call methods on objects - Differentiate between object reference variables and primitive variables - Explain an object's lifecycle (creation, dereferencing via garbage collection) - Read or write to object fields - Create and manipulate strings |
| Database Applications with JDBC | 5% | - Connect to a database using JDBC - Describe the advantages of using a connection pool - Execute queries and process results - Use parameterized queries |
| Working with Arrays and Collections | 8% | - Filter a collection using lambda expressions - Iterate through a collection - Create a list, set, map, or queue collection - Use generic types and diamond operator - Sort elements in a collection - Search for elements in a collection |
| Exception Handling and Localization | 10% | - Create and throw custom exceptions - Use standard exception classes - Describe the advantages of exception handling - Use resource bundles and locale classes for internationalization - Create try-catch blocks and understand exception propagation - Use assertions |
どちらが本当でしょうか？
Correct Answer: A 🗳️
与えられた条件:
出力は何ですか?
Correct Answer: A 🗳️
次のコードフラグメントがあるとします:
結果はどうなりましたか？
Correct Answer: B 🗳️
与えられた条件:
Verified を印刷するにはどのアクションを実行する必要がありますか?
Correct Answer: D 🗳️
次の宣言を前提とします。
次のコード フラグメントを調べます。
/* Loc1 */ クラス ProcessOrders { ... }
コード フラグメントの Loc1 に適用できる 2 つのアノテーションはどれですか。(2 つ選択してください。)
Correct Answer: C,D 🗳️
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