Oracle 1Z0-819 Test Engine Practice Test Questions, Exam Dumps
100% Free 1Z0-819 Daily Practice Exam With 297 Questions
NEW QUESTION # 76
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)
- A. Option B
- B. Option A
- C. Option C
- D. Option D
Answer: C
NEW QUESTION # 77
Given the code fragment:
What is the result?
- A. ghi jkl
- B. gh ij kl
- C. The compilation fails.
- D. gj hk il
- E. An ArrayIndexOutofBoundsException is thrown at runtime.
Answer: E
NEW QUESTION # 78
Examine these module declarations:
Which two statements are correct? (Choose two.)
- A. The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.
- B. The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
- C. The ServiceProvider module should export the com.myimpl package.
- D. The Consumer module should require the ServiceProvider module.
- E. The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the
Answer: B,D
Explanation:
com.example.api API.
NEW QUESTION # 79
Given:
and
What is the result?
- A. The compilation fails.
- B. A ClassCastException is thrown at run time.
- C. A NullPointerException is thrown at run time.
- D. 1
1
1 - E. 1
Null
null
Answer: A
Explanation:
NEW QUESTION # 80
Given:
and omitting the throws FooException clause results in a compilation error.
Which statement is true about FooException?
- A. The body of foo can only throw FooException.
- B. The body of foo can throw FooException or one of its subclasses.
- C. FooException is unchecked.
- D. FooException is a subclass of RuntimeError.
Answer: B
NEW QUESTION # 81
Given the code fragment:
Which code fragment replaces the for statement?
- A. IntStream.range(1, 100).mapToObj(FizzBuzz::convert).forEach(System.out::println);
- B. IntStream.rangeClosed(l, 100).map(FizzBuzz::convert).forEach(System.out::println);
- C. intstream.rangeclosed(l, 100).mapToObj{FizzBuzz::convert).forEach(System.out::printIn);
- D. IntStream.ranged, 100).map(FizzBuzz::convert).forEach(System.out::println);
Answer: B
NEW QUESTION # 82
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, 25, null, 1000]
- D. [Peter, 30, Market Road]
Answer: A
Explanation:
NEW QUESTION # 83
Given a Memberclass with fields for nameand yearsMembership, including getters and setters and a print method, and a list of clubMembersmembers:
Which two Stream methods can be changed to use method references? (Choose two.)
- A. map(testName::compareToIgnoreCase)
- B. peek(Member::print)
- C. filter(Integer::equals(0))
- D. filter(Member::getYearsMembership() >= testMembershipLength)
Answer: A,D
NEW QUESTION # 84
Given the code fragment:
What is the result?
- A. The compilation fails at line 13.
- B. The compilation fails at line
- C. 0
- D. 1
- E. The compilation fails at line 16.
Answer: C
NEW QUESTION # 85
Assuming the Widget class has a getPrice method, this code does not compile:
Which two statements, independently, would allow this code to compile? (Choose two.)
- A. Replace line 5 with widgetStream.filter(a > ((Widget)a).getPrice() > 20.00).
- B. Replace line 1 with List<Widget> widgetStream = widgets.stream();.
- C. Replace line 5 with widgetStream.filter((Widget a) > a.getPrice() > 20.00).
- D. Replace line 4 with Stream<Widget> widgetStream = widgets.stream();.
Answer: A,D
NEW QUESTION # 86
Given:
Assuming that this code compiles correctly, which three statements are true? (Choose three.)
- A. B cannot be abstract.
- B. A cannot be abstract.
- C. B is a subtype of A.
- D. B cannot be final.
- E. A cannot be final.
- F. A is a subtype of B.
Answer: A,C,E
NEW QUESTION # 87
Given:
What will secure this code from a potential Denial of Service condition?
- A. On Line 1, use try with resources when opening each dataReader.
- B. On Line 3, enclose processData(dataReader) with try with resources.
- C. After Line 4, add indexReader.close().
- D. After Line 3, add dataReader.close().
- E. Before Line 1, check the size of dataFiles to make sure it does not exceed a threshold.
Answer: B
NEW QUESTION # 88
Given:
Which statement is equivalent to line 1?
- A. double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).reduce(starts, bo);
- B. double totalSalary = list.stream().map(e > e.getSalary() * ratio).reduce (bo).ifPresent (p > p.doubleValue());
- C. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);
- D. double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).sum;
Answer: C
Explanation:
NEW QUESTION # 89
Which two are functional interfaces? (Choose two.)
- A. Option B
- B. Option A
- C. Option C
- D. Option D
- E. Option E
Answer: C,E
NEW QUESTION # 90
Which code fragment prints 100 random numbers?
- A. Option B
- B. Option A
- C. Option D
- D. Option C
Answer: C
NEW QUESTION # 91
Given the code fragment:
Which action enables Computatorclass to compile?
- A. change Line 3 to Double sum = 0.0;
- B. change Line 5 to List<Double> numbers = List.of(5, 4, 6, 3, 7, 2, 8, 1, 9);
- C. change Line 2 to public Double sum ( C collection) {
- D. change Line 1 to add throws NumberFormatException
- E. change Line 4 to for (Double n : collection) {
Answer: C
NEW QUESTION # 92
Which code fragment added to line 1 enables the code to compile and print Hello Joe?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION # 93
Given:
Which three classes successfully override printOne()? (Choose three.)
- A. Option B
- B. Option C
- C. Option F
- D. Option D
- E. Option E
- F. Option A
Answer: B,D,F
NEW QUESTION # 94
Given:
What is the result?
- A. [A, B, C]
followed by an exception thrown on line 11. - B. [A, B, C]
[A, B] - C. [A, B, C]
[A, B, C] - D. On line 9, an exception is thrown at run time.
Answer: C
Explanation:
Explanation
Graphical user interface, text, application Description automatically generated
NEW QUESTION # 95
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