[Q151-Q172] リアルな1z1-819は100%カバー試験問題をゲット [2024年11月]

リアルな1z1-819は100%カバー試験問題をゲット [2024年11月]

問題集まとめ概要は1z1-819試験問題集はここ

質問 # 151
Given:

Which statement is equivalent to line 1?

A. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);
B. double totalSalary = list.stream().map(e -> e.getSalary() * ratio).reduce (bo).ifPresent (p -> p.doubleValue());
C. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).reduce(starts, bo);
D. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).sum;

正解：A

解説：

質問 # 152
Given the code fragment:

What is the result?

A. 2 4 6 8
B. 2 4 6 B 10
C. 1 3 5 7 9 11
D. 13 5 7 9

正解：C

質問 # 153
Given the code fragment:
var pool = Executors.newFixedThreadPool(5);
Future outcome = pool.submit(() > 1);
Which type of lambda expression is passed into submit()?

A. java.util.concurrent.Callable
B. java.lang.Runnable
C. java.util.function.Function
D. java.util.function.Predicate

正解：A

質問 # 154
Given:

What is the result?

A. 3, 4, 3
B. 3, 4
C. The program prints 3 4 and throws a ClassCastException
D. 3, 4, 3, 14

正解：C

質問 # 155
Given the code fragment:

What is the result?

A. false true true
B. false true false
C. true false false
D. false false true

正解：B

解説：

質問 # 156
Given:

Which code fragment on line 1 makes the m map contain the employee with the highest salary for each neighborhood?

正解：A

質問 # 157
Given:

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

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

正解：B、D、F

質問 # 158
Given the code fragment:

Which can replace line 2?

A. UnaryOperator u = i -> { return i * 2);
B. UnaryOperator u = var i -> { return i * 2; };
C. UnaryOperator u = (int i) -> i * 2;
D. UnaryOperator u = (var i) -> (i * 2);

正解：D

質問 # 159
Given the content:

What Is the result?
A)

B)

C)

D)

E)
User Username

A. Option A
B. Option B
C. Option D
D. Option C
E. Option

正解：C、E

質問 # 160
Given:

What is the result?

A. 0
B. 1
C. An exception is thrown at runtime.
D. The compilation fails.

正解：D

質問 # 161
Given:

What is the result?

A. 2,34,54,3
B. 2,54,54,5
C. 2,34,34,5
D. 2,34,54,5

正解：B

解説：

質問 # 162
Given:

What is the result?

A. Mr, Green
B. An exception is thrown at runtime
C. Mr, Blue
D. Green

正解：C

質問 # 163
Given:

Which two lines inserted in line 1 will allow this code to compile? (Choose two.)

A. protected void walk(){}
B. void walk(){}
C. public abstract void walk();
D. abstract void walk();
E. private void walk(){}

正解：A、C

質問 # 164
Which two interfaces are considered to be functional interfaces? (Choose two.)
@FunctionalInterface

A. interface InterfaceE {
public boolean equals(int i);
int breed(int x);
}
interface InterfaceA {
B. int GERM = 13;
public default int getGERM() { return GERM; }
}
interface InterfaceB {
C. interface InterfaceC {
public boolean equals(Object o);
int breed(int x);
int calculate(int x, int y);
}
@FunctionalInterface
D. int GERM = 13;
public default int getGERM() { return get(); }
private int get() { return GERM; }
public boolean equals(Object o);
int breed(int x);
}
E. interface InterfaceD {
int breed(int x);
}
@FunctionalInterface

正解：A、C

解説：
Explanation/Reference:

質問 # 165
Given:

Which two are correct? (Choose two.)

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

正解：C、D

質問 # 166
Given:

executed with this command:
java Main one two three
What is the result?

A. 0). one1). two2). three
B. 0). one
C. The compilation fails.
D. It creates an infinite loop printing:0). one1). two1). two...
E. A java.lang.NullPointerException is thrown.

正解：D

質問 # 167
Given:

What is the output?

A. A runtime error is thrown.
B. Message from Abstract Copier: Attempt00
C. Message from Copier: Attempt00
D. A compilation error is thrown.

正解：D

質問 # 168
Given these declarations:

and these two code fragments:
Fragment 1:

Fragment 2:

Which code fragment is preferred and why?

A. Fragment 1 because it is more performant.
B. Fragment 2 because it explicitly specifies the SQL types of the column values.
C. Fragment 1 because it is shorter.
D. Fragment 2 because it prevents SQL injection.

正解：D

質問 # 169
Given:

Which action must you perform to print Verified?

A. Change the declaration of the order variable to orderService order = New order(); and Invoke the verify method from the main method.
B. Invoke the verify method from the place method.
C. Make the verify method public and invoke it from the main method.
D. Invoke the verify method from the main method.

正解：B

質問 # 170
Given:

Which one is correct?