更新済みの2025年10月 1Z0-819試験練習テスト問題 [Q117-Q142]

更新済みの2025年10月 1Z0-819試験練習テスト問題

検証済み1Z0-819問題集と解答100%一発合格保証で更新された問題集

Oracle 1z1-819 認定試験は、Java開発者がキャリアアップの機会を拡大し、Java SE 11の専門知識を証明するために強く推奨されています。また、組織内でスキルの高いJava開発者を特定したい雇用者にも有益です。この認定は開発者に競争力を与え、仕事市場での信頼性を向上させます。試験は難しいですが、適切な準備と練習をすることで、開発者は合格してOracle 1z1-819 認定を取得することができます。

 

質問 # 117
Given:

What is the result?

• A. 0
• B. 1
• C. 2
• D. 3
• E. 4

正解：A

質問 # 118
Which code fragment compiles?

• A. Option B
• B. Option D
• C. Option A
• D. Option C

正解：B

解説：

質問 # 119
And the code fragment:

Which situation will occur on code fragment execution?

• A. Deadlock
• B. Race Condition
• C. Livelock
• D. Starvation

正解：D

質問 # 120
Given:

What is the result?

• A. Map: 4 Keys: 0 Values: 0
• B. The compilation fails.
• C. Map: 0 Keys: 0 Values: 0
• D. Map: 4 Keys: 4 Values: 4
• E. Map: 0 Keys: 4 Values: 4

正解：A

解説：

質問 # 121
Which two statements set the default locale used for formatting numbers, currency, and percentages? (Choose two.)

• A. Locale.setDefault("en_CA");
• B. Locale.setDefault("es", Locale.US);
• C. Locale.setDefault(Locale.Category.FORMAT, "zh-CN");
• D. Locale.setDefault(Locale.Category.FORMAT, Locale.CANADA_FRENCH);
• E. Locale.setDefault(Locale.SIMPLIFIED_CHINESE);

正解：A、D

質問 # 122
Given:

What is the result?

• A. An exception is thrown at runtime.
• B. 0
• C. 1
• D. 2

正解：C

解説：

質問 # 123
Given the formula to calculate a monthly mortgage payment:

and these declarations:

How can you code the formula?

• A. m = p * r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1;
• B. m = p * (r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1);
• C. m = p * ((r * Math.pow(1 + r, n) / (Math.pow(1 + r, n)) - 1));
• D. m = p * (r * Math.pow(1 + r, n) / (Math.pow(1 + r, n) - 1));

正解：D

質問 # 124
Given:

You want to implement the java.io.Serializable interface to the MyPersistenceData class.
Which method should be overridden?

• A. the writeExternal method
• B. nothing
• C. the readExternal method
• D. the readExternal and writeExternal method

正解：D

質問 # 125
Given the code fragment:

What is the result?

• A. abc def
• B. ab cd ef
• C. The compilation fails.
• D. ad be cf
• E. An ArrayIndexOutOfBoundsException is thrown at runtime.

正解：D

質問 # 126
Given:

Which statement is true about the Fox class?

• A. Fox class must provide implementation for the inhabit method.
• B. The inhabit method implementation from the first interface that Fox implements will take precedence.
• C. Fox class does not have to override inhabit method, so long as it does not try to call it.
• D. Fox class must implement either Forest or Town interfaces, but not both.
• E. Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.

正解：E

質問 # 127
Given:
List<String> longlist = List.of("Hello","World","Beat");
List<String> shortlist = new ArrayList<>();
Which code fragment correctly forms a short list of words containing the letter "e"?

• A. Option D
• B. Option B
• C. Option C
• D. Option A

正解：C

質問 # 128
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.

正解：A

質問 # 129
Given:

Which statement is true?

• A. The code fails to compile as try-try-resource needs a variable declaration such as MyResource r1= res1; MyResource r2 = res2;.
• B. The code fails to compile as MyResource must implement Closeable.
• C. The code fails to compile as res2 should be declared as final.
• D. The code compiles successfully.

正解：D

質問 # 130
Given the code fragment:

What is the result?

• A. 0
• B. 1
• C. 2
• D. 3

正解：B

解説：

質問 # 131
Given:

What is the result?

• A. Joe
  null
• B. null
  null
• C. Joe
  Marry
• D. null
  Mary

正解：A

解説：
Explanation
Graphical user interface, application Description automatically generated

質問 # 132
Examine these module declarations:

Which two statements are correct? (Choose two.)

• A. The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the com.example.api API.
• B. The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
• C. The Consumer module should require the ServiceProvider module.
• D. The ServiceProvider module should export the com.myimpl package.
• E. The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.

正解：B、C

質問 # 133
Given:

Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)

• A. public List<Integer> foo(Set<CharSequence> m) { ... }
• B. public ArrayList<Integer> foo(Set<String> m) { ... }
• C. public List<Integer> foo(TreeSet<String> m) { ... }
• D. public ArrayList<Number> foo(Set<CharSequence> m) { ... }
• E. public List<Integer> foo(Set<String> m) { ... }
• F. public List<Object> foo(Set<CharSequence> m) { ... }

正解：C、D

質問 # 134
Given:

What is the result?

• A. 0
• B. 1
• C. An exception is thrown at runtime.
• D. 2

正解：A

解説：
Explanation
Graphical user interface, text, application, chat or text message Description automatically generated

質問 # 135
Given:

What is the output?

• A. Bonjour le monde!Bonjour le monde!
• B. Hello world!Hello world!
• C. Hello world!Bonjour le monde!
• D. Bonjour le monde!Hello world!

正解：D

解説：

質問 # 136
Given:

And the command:
java Main Helloworld
What is the result ?

• A. A NullPointerException is thrown at run time.
• B. Input: Echo:
• C. Input: Helloworld Echo: Helloworld
• D. Input:
  Then block until any input comes from System.in.
• E. Input:
  Echo: Helloworld

正解：D

解説：

質問 # 137
Given:

Which three classes successfully override printOne()? (Choose three.)

• A. Option A
• B. Option E
• C. Option B
• D. Option D
• E. Option C
• F. Option F

正解：A、D、E

質問 # 138
Given:

What is the result:
X is 2

• A. The compilation fails due to an error in line 1.
• B. The compilation fails due to an error in line 2.
• C. Error parsing value 0
• D. X is 10.

正解：B

質問 # 139
Given:

Which code, when inserted at one or more marked positions, would allow classes B and C to compile?

• A. @Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3
• B. public void z() { } // position 3
• C. @Override // position 2public void z() { } // position 3
• D. implements A // position 1@Override // position 2

正解：C

質問 # 140
Given:

What is the result?

• A. adf
• B. abdf
• C. abcd
• D. The compilation fails.
• E. abd

正解：C

質問 # 141
Why would you choose to use a peek operation instead of a forEach operation on a Stream?

• A. to remove an item from the beginning of the stream
• B. to process the current item and return void
• C. to remove an item from the end of the stream
• D. to process the current item and return a stream

正解：D

質問 # 142
......

Oracle 1Z0-819試験は、Java開発者がJava SE 11開発の熟練度を証明するための貴重な認定です。この試験は、Javaプログラミングに関連するさまざまなトピックをカバーしており、合格にはJavaの概念やプラクティスについての確固たる理解が必要です。候補者は、さまざまな学習資料やJavaプログラミングの実践経験を活用して試験の準備をすることができます。

 

究極の準備用無料ガイド1Z0-819試験問題と解答：https://drive.google.com/open?id=1PHurbJApfgrDKbN2ISyJ1T5Ykv8YfBhn

合格できるOracle Java SE 1Z0-819試験問題集には297問があります：https://www.jpntest.com/shiken/1Z0-819-mondaishu