Guide (New 2023) Actual Oracle 1z1-819 Exam Questions [Q12-Q36]

Guide (New 2023) Actual Oracle 1z1-819 Exam Questions

1z1-819 Exam Dumps Pass with Updated 2023 Certified Exam Questions

NEW QUESTION 12
Given:

When is the readObject method called?

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

Answer: C

NEW QUESTION 13
Given:

You want to use the myResource class in a try-with-resources statement. Which change will accomplish this?

A. Implement AutoCloseable and override the close method.
B. Implement AutoCloseable and override the autoClose method.
C. Extend AutoCloseable and override the autoClose method.
D. Extend AutoCloseable and override the close method.

Answer: A

NEW QUESTION 14
Given:

What is the result?

A. Dr. Null
B. null
C. An exception is thrown at runtime.
D. Dr. Who

Answer: B

Explanation:

NEW QUESTION 15
Given:

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

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

Answer: B,D

NEW QUESTION 16
Given:

Which statement on line 1 enables this code to compile?

A. Function<Integer> f = n -> n * 2;
B. Function<int, int> f = n -> n * 2;
C. Function<int> f = n -> n * 2;
D. Function f = n -> n * 2;
E. Function<Integer, Integer> f = n -> n * 2;

Answer: E

Explanation:

NEW QUESTION 17
Which method throws an exception for not-a-number and infinite input values?
A)

B)

C)

D)

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

Answer: B

NEW QUESTION 18
Given this requirement:
Module vehicle depends on module part and makes its com.vehicle package available for all other modules.
Which module-info.java declaration meets the requirement?

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

Answer: B

NEW QUESTION 19
Given:

Which three are true? (Choose three.)

A. f2.foo(c) prints Ola Mundo!
B. b1.foo(c) prints Bonjour le monde!
C. f1.foo(c) prints Ola Mundo!
D. b1.foo(c) prints Ola Mundo!
E. b1.foo(c) prints Hello world!
F. f1.foo(c) prints Hello world!
G. f2.foo(c) prints Bonjour le monde!
H. f1.foo(c) prints Bonjour le monde!
I. f2.foo(c) prints Hello world!

Answer: D,F,G

NEW QUESTION 20
Given:

and:

Which code, when inserted on line 10, prints the number of unique localities from the roster list?

A. .filter(Employee::getLocality)
.distinct()
.count();
B. .map(Employee::getLocality)
.distinct()
.count();
C. .map(e > e.getLocality())
.collect(Collectors.toSet())
.count();
D. map(e > e.getLocality())
.count();

Answer: A

NEW QUESTION 21
Given:

What is the result?

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

Answer: C

NEW QUESTION 22
Given:

What is the result?

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

Answer: A

Explanation:

NEW QUESTION 23
Why would you choose to use a peek operation instead of a forEach operation on a Stream?

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

Answer: A

NEW QUESTION 24
Given the code fragment:

What is the result?

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

Answer: B

Explanation:

NEW QUESTION 25
Given:

Assume the file on path does not exist. What is the result?

A. Exception
B. /u01/work/filestore.txt is deleted.
C. /u01/work/filestore.txt is not deleted.
D. The compilation fails.

Answer: D

Explanation:

NEW QUESTION 26
Given:

What is the result?

A. The compilation fails at line 2.
B. Hello World
C. The compilation fails at line 8.
D. The compilation fails at line 9.

Answer: B

Explanation:

NEW QUESTION 27
Given:

What is the result?

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

Answer: B

NEW QUESTION 28
Given:

Which two constructors will compile and set the class field strings? (Choose two.)

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

Answer: A,C

NEW QUESTION 29
Given:

and omitting the throws FooException clause results in a compilation error.
Which statement is true about FooException?

A. FooException is a subclass of RuntimeError.
B. FooException is unchecked.
C. The body of foo can only throw FooException.
D. The body of foo can throw FooException or one of its subclasses.

Answer: D

NEW QUESTION 30
Given:
var fruits = List.of("apple", "orange", "banana", "lemon");
You want to examine the first element that contains the character n. Which statement will accomplish this?

A. fruits.stream().filter(f > f.contains("n")).forEachOrdered(System.out::print);
B. Optional<String> result = fruits.stream().anyMatch(f > f.contains("n"));
C. Optional<String> result = fruits.stream().filter(f > f.contains ("n")).findFirst ();
D. String result = fruits.stream().filter(f > f.contains("n")).findAny();

Answer: A

Explanation:

NEW QUESTION 31
Given:

What is the result?

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

Answer: D

NEW QUESTION 32
Given the code fragment:

What is the result?

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

Answer: D

NEW QUESTION 33
There is a copyServiceAPI that has the org.copyservice. spi. Copy interface To use this service in a module, which module- info.java would be correct?
A)

B)

C)

D)