更新済みの2026年01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
質問 # 63
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. 42=(x+y)=6
- C. 6=(x+y)=42
- D. 6=(x+y)=6
- E. 42=(x+y)=42
正解：C
解説：
質問 # 64
Given:
What is the result?
- A. compilation error
- B. 5 12
- C. 6 13
- D. 0 5
正解：A
解説：
質問 # 65
Given the code fragment:
What is the result?
- A. EUR -> 0.84
GBP -> 0.75
USD -> 1.00
CNY -> 6.42 - B. CNY -> 6.42
EUR -> 0.84
GBP -> 0.75
USD -> 1.00 - C. USD -> 1.00
GBP -> 0.75
EUR -> 0.84
CNY -> 6.42 - D. The compilation fails.
正解：D
解説：
Explanation
Text Description automatically generated
質問 # 66
Given:
executed using this command:
java Myclass My Car is red
What is the output of this class?
- A. My--is--java
- B. My--Car--is
- C. Myclass--Car--red
- D. java--Myclass--My
- E. Car--red--My
正解：E
質問 # 67
Given:
What action ensures successful compilation?
- A. Replace int c; with private int c;.
- B. Replace enum Color implements Serializable with public enum Color.
- C. Replace public Color(int c) with private Color(int c).
- D. Replace enum Color with public enum Color.
- E. Replace int c; with private final int c;.
正解：C
解説：
質問 # 68
Given:
What is the output?
A)
B)
C)
D)
- A. option B
- B. option C
- C. option D
- D. option A
正解：C
質問 # 69
Given:
What is the result?
- A. 3, 4, 3, 14
- B. 3, 4
- C. 3, 4, 3
- D. The program prints 3 4 and throws a ClassCastException
正解：D
質問 # 70
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 # 71
Given the code fragment:
What is the result?
- A. The compilation fails.
- B. abc def
- C. An ArrayIndexOutOfBoundsException is thrown at runtime.
- D. ab cd ef
- E. ad be cf
正解：E
質問 # 72
Given:
jdeps -jdkinternals C:\workspace4\SimpleSecurity\jar\classes.jar
Which describes the expected output?
- A. The -jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.
- B. jdeps outputs an error message that the -jdkinternals option requires either the -summary or the - verbose options to output to the console.
- C. jdeps lists the module dependencies and the package names of all referenced JDK internal APIs. If any are found, the suggested replacements are output in the console.
- D. The -jdkinternals option analyzes all classes in the .jar and prints all class-level dependencies.
正解：A
解説：
-jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.
質問 # 73
Given:
Which two constructors will compile and set the class field strings? (Choose two.)
- A. Option B
- B. Option D
- C. Option A
- D. Option E
- E. Option C
正解：D、E
質問 # 74
Given:
What is required to make the Foo class thread safe?
- A. Move the declaration of lock inside the foo method.
- B. No change is required.
- C. Replace the lock constructor call with new ReentrantLock (true).
- D. Make the declaration of lock static.
正解：C
質問 # 75
Given:
Which two interfaces can be used in lambda expressions? (Choose two.)
- A. MyInterface1
- B. MyInterface5
- C. MyInterface4
- D. MyInterface2
- E. MyInterface3
正解：D、E
質問 # 76
Given:
Which two are correct? (Choose two.)
- A. Option B
- B. Option A
- C. Option D
- D. Option C
正解：C、D
質問 # 77
Given the code fragment:
Which statement at line 1 will print Ping Pong?
- A.
- B.
- C.
- D.
正解：C
質問 # 78
Given:
Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)
- A. public ArrayList<Number> foo(Set<CharSequence> m) { ... }
- B. public List<Integer> foo(Set<String> m) { ... }
- C. public ArrayList<Integer> foo(Set<String> m) { ... }
- D. public List<Integer> foo(TreeSet<String> m) { ... }
- E. public List<Object> foo(Set<CharSequence> m) { ... }
- F. public List<Integer> foo(Set<CharSequence> m) { ... }
正解：A、D
質問 # 79
Given:
Which option should you choose to enable the code to print Something happened?
- A. Add extends Exception on line 1.
Add extends Exception on line 2. - B. Add extends Exception on line 1.
Add extends GeneralException on line 2. - C. Add extends SpecificException on line 1.
Add extends GeneralException on line 2. - D. Add extends GeneralException on line 1.
Add extends Exception on line 2.
正解：B
解説：
質問 # 80
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
解説：
質問 # 81
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