1z1-819問題集PDFで1z1-819リアル試験問題解答 [Q133-Q155]

1z1-819問題集PDFで1z1-819リアル試験問題解答

時間限定！今すぐ試そう1z1-819試験 [2023] 問題集でOracleのPDF問題

Oracle 1Z0-819認定試験に合格することは、Java開発者がJava SE 11に強い理解を持ち、堅牢で効率的なJavaアプリケーションを開発できることを示しています。この認定は、競争の激しい就職市場で開発者が目立つことができ、新しい就職機会や高い給与につながる可能性があります。

質問 # 133
Given:

Which three actions implement Java SE security guidelines? (Choose three.)

A. Change line 6 to public synchronized String[] getNames() {.
B. Change line 2 to private final String[] names;.
C. Change line 7 to return names.clone();.
D. Change the getNames() method name to get$Names().
E. Change line 4 to this.names = names.clone();.
F. Change line 3 to private Secret(String[] names) {.
G. Change line 2 to protected volatile String[] names;.

正解：B、F、G

質問 # 134
Given the Person class with age and name along with getter and setter methods, and this code fragment:

What will be the result?

A. Tom Aman Peter
B. Tom Peter Aman
C. Aman Tom Peter
D. Aman Peter Tom

正解：D

質問 # 135
Given:

Which statement on line 1 enables this code fragment to compile?

A. Function<String> function = m > m.toUpperCase();
B. UnaryOperator<String> function = String::toUpperCase;
C. UnaryOperator function = s > s.toUpperCase();
D. Function function = String::toUpperCase;

正解：B

解説：

質問 # 136
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?

A. module PrintServiceProvider {
requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
}
B. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi;
}
C. module PrintServiceProvider {
requires PrintServiceAPI;
uses com.provider.PrintService;
}
D. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi.Print with
D18912E1457D5D1DDCBD40AB3BF70D5D
com.provider.PrintService;
}

正解：B

質問 # 137
A bookstore's sales are represented by a list of Sale objects populated with the name of the customer and the books they purchased.
public class Sale {
private String customer;
private List<Book> items;
// constructor, setters and getters not shown
}
public class Book {
private String name;
private double price;
// constructor, setters and getters not shown
}
Given a list of Sale objects, tList, which code fragment creates a list of total sales for each customer in ascending order?

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

正解：B

質問 # 138
Which two interfaces are considered to be functional interfaces? (Choose two.)

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

正解：B、C

質問 # 139
Given:

What is the result?

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

正解：B

解説：

質問 # 140
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 SpecificException on line 1.
Add extends GeneralException on line 2.
C. Add extends GeneralException on line 1.
Add extends Exception on line 2.
D. Add extends Exception on line 1.
Add extends GeneralException on line 2.

正解：D

解説：

質問 # 141
Given the code fragment:

What is the result?

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

正解：C

質問 # 142
Given:

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

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

正解：A、B、C

質問 # 143
Given:

What is the result?

A. [A, B, C]
[A, B, C]
B. [A, B, C]
followed by an exception thrown on line 11.
C. [A, B, C]
[A, B]
D. On line 9, an exception is thrown at run time.

正解：A

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

質問 # 144
Given:
public class X {
}
and
public final class Y extends X {
}
What is the result of compiling these two classes?

A. The compilation fails because there is no zero args constructor defined in class X.
B. The compilation fails because either class X or class Y needs to implement the toString() method.
C. The compilation succeeds.
D. The compilation fails because a final class cannot extend another class.

正解：B

解説：

質問 # 145
Given:

What is the result?

A. It fails to compile.
B. null
C. java.lang.IllegalAccessException is thrown.
D. Student
E. nothing

正解：A

質問 # 146
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(TreeSet<String> m) { ... }
C. public ArrayList<Integer> foo(Set<String> m) { ... }
D. public List<Object> foo(Set<CharSequence> m) { ... }
E. public List<Integer> foo(Set<String> m) { ... }
F. public List<Integer> foo(Set<CharSequence> m) { ... }

正解：A、B

質問 # 147
Given:

This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?

A. Consumer consumer = (String args) > System.out.print(args);
B. Consumer consumer = System.out::print;
C. Consumer consumer = msg -> { return System.out.print(msg); };
D. Consumer consumer = var arg > {System.out.print(arg);};

正解：B

解説：

質問 # 148
Given:

Examine these requirements:
Eliminate code duplication.
Keep constant the number of methods other classes may implement from this interface.
Which method can be added to meet these requirements?

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

正解：D

質問 # 149
Given:

What is the result?

A. [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet
B. java.lang.ArrayIndexOutOfBoundsException thrown
C. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
D. [0,0] = Red[1,0] = Black[2,0] = Blue

正解：A

解説：

質問 # 150
Given the code fragment:

What is the result?

A. 3 : 0
B. 2 : 3
C. 2 : -1
D. -1 : 2

正解：C

質問 # 151
Given:

Which annotation should be used to remove warnings from compilation?

A. @SuppressWarnings("unchecked") on main and @SafeVarargs on the print method
B. @SuppressWarnings("rawtypes") on main and @SafeVarargs on the print method
C. @SuppressWarnings on the main and print methods
D. @SuppressWarnings("all") on the main and print methods

正解：A

解説：

質問 # 152
A company has an existing sales application using a Java 8 jar file containing packages:
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.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?
A)

B)

C)

D)