Oracle 1Z0-819 Questions and Answers Guarantee you Oass the Test Easily [Q131-Q148]

Oracle 1Z0-819 Questions and Answers Guarantee you Oass the Test Easily

Share Latest 1Z0-819 DUMP with 297 Questions and Answers

Oracle 1Z0-819 exam covers a wide range of topics related to Java programming, including Java basics, object-oriented programming, functional programming, concurrency, JDBC, and security. 1Z0-819 exam consists of 80 multiple-choice and multiple-select questions, and the candidate is given three hours to complete the exam. The passing score for 1Z0-819 exam is 63% or higher, and candidates who pass the exam receive the Oracle Certified Professional: Java SE 11 Developer certification.

NEW QUESTION # 131
Given:

Which two lines can replace line 1 so that the Y class compiles? (Choose two.)

A. map.forEach((k, v) -> set(v)));
B. set(map.values());
C. set(map)
D. super.set(List<String> map)
E. super.set(map.values());

Answer: B,E

NEW QUESTION # 132
Given the code fragment:

What is the result?

A. A java.lang.NullPointerException is thrown.
B. A java.lang, UnsupportedOperationException is thrown.
C. False
D. True

Answer: B

NEW QUESTION # 133
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?
module PrintServiceProvider {

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

Answer: B

NEW QUESTION # 134
Which declaration of an annotation type is legal?
@interface Author {

A. String name() default null;
String date();
}
@interface Author {
B. String name();
String date;
}
@interface Author {
C. String name() default "";
String date();
}
@interface Author extends Serializable {
D. String name() default "";
String date();
}
@interface Author {
E. String name();
String date default "";
}

Answer: C

NEW QUESTION # 135
Which interface in the java.util.function package can return a primitive type?

A. LongConsumer
B. ToDoubleFunction
C. Supplier
D. BiFunction

Answer: B

NEW QUESTION # 136
Given:

When is the readObject method called?

A. after this object is serialized
B. after this object is deserialized
C. before this object is deserialized
D. before this object Is serialized
E. The method is never called.

Answer: B

NEW QUESTION # 137
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

Answer: D

NEW QUESTION # 138
Given:

Which expression when added at line 1 will produce the output of 1.17?

A. float z = (float)(Math.round((float)x/y*100)/100);
B. float z = Math.round((float)x/y,2);
C. float z = Math.round((float)x/y*100)/(float)100;
D. float z = Math.round((int)(x/y),2);

Answer: C

Explanation:

NEW QUESTION # 139
You are working on a functional bug in a tool used by your development organization. In your investigation, you find that the tool is executed with a security policy file containing this grant.

What action should you take?

A. Nothing, because listing just the required permissions would be an ongoing maintenance challenge.
B. Remove the grant because it is excessive.
C. Nothing, because it is an internal tool and not exposed to the public.
D. File a security bug against the tool referencing the excessive permission granted.
E. Nothing, because it is not related to the bug you are investigating.

Answer: D

NEW QUESTION # 140
Given:
var data = new ArrayList<>();
data.add("Peter");
data.add(30);
data.add("Market Road");
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?

A. An exception is thrown at run time.
B. [Market Road, 1000]
C. [Peter, 30, Market Road]
D. [Peter, 25, null, 1000]

Answer: A

Explanation:

NEW QUESTION # 141
Given the code fragment:

Which code fragment replaces the for statement?

A. IntStream.ranged, 100).map(FizzBuzz::convert).forEach(System.out::println);
B. IntStream.range(1, 100).mapToObj(FizzBuzz::convert).forEach(System.out::println);
C. intstream.rangeclosed(l, 100).mapToObj{FizzBuzz::convert).forEach(System.out::printIn);
D. IntStream.rangeClosed(l, 100).map(FizzBuzz::convert).forEach(System.out::println);

Answer: D

NEW QUESTION # 142
Given:

What is the output?

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

Answer: C

Explanation:

NEW QUESTION # 143
Given:

It is required that if p instanceof Pair then p.isValid() returns true.
Which is the smallest set of visibility changes to insure this requirement is met?

A. left and right must be private.
B. isValid must be public.
C. left, right, setLeft, and setRight must be private.
D. setLeft and setRight must be protected.

Answer: A

NEW QUESTION # 144
Given:
String originalPath = "data\\projects\\a-project\\..\\..\\another-project"; Path path = Paths.get(originalPath); System.out.print(path.normalize()); What is the result?