2021 Latest Oracle 1Z0-819 Real Exam Dumps PDF
1Z0-819 Exam Dumps, 1Z0-819 Practice Test Questions
NEW QUESTION 11
Given the content:
What Is the result?
A)
B)
C)
D)
E)
User Username
- A. Option
- B. Option B
- C. Option C
- D. Option A
- E. Option D
Answer: A,E
NEW QUESTION 12
Given the code fragment:
Which two code snippets inserted independently inside print method print Mondial: domainmodal?
- A. prefix + name
- B. prefix + getName
- C. Main.prefix + Main.getName()
- D. Main.prefix + Main.name
- E. prefix + Main, name
- F. new Main (} .prefix + new Main().name
Answer: E,F
NEW QUESTION 13
Given:
Which two allow a.Main to allocate a new Person? (Choose two.)
- A. In Line 1, change the access modifier to privateprivate Person() {
- B. In Line 2, change the access modifier to protectedprotected class Main {
- C. In Line 2, add extends Person to the Main classpublic class Main extends Person {and change Line 3 to create a new Main objectPerson person = new Main();
- D. In Line 1, change the access modifier to publicpublic Person() {
- E. In Line 1, remove the access modifierPerson() {
Answer: C,D
NEW QUESTION 14
Given:
Which two statements are true if the method is added to Bar? (Choose two.)
- A. public <T> Collection<T> foo(Stream<T> arg) { ... } overloads Foo.foo.
- B. public Collection<String> foo(Collection<String> arg) { ... } overrides Foo.foo.
- C. public <T> Collection<T> foo(Collection<T> arg) { ... } overloads Foo.foo.
- D. public <T> List<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
- E. public <T> Iterable<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
- F. public <T> Collection<T> bar(Collection<T> arg) { ... } overloads Foo.foo.
Answer: D,E
NEW QUESTION 15
Given:
Which expression when added at line 1 will produce the output of 1.17?
- A. float z = Math.round((int)(x/y),2);
- B. float z = Math.round((float)x/y,2);
- C. float z = (float)(Math.round((float)x/y*100)/100);
- D. float z = Math.round((float)x/y*100)/(float)100;
Answer: D
Explanation:
NEW QUESTION 16
Given:
What is the result?
- A. Good Night, Harry
- B. Good Morning, Harry
- C. Good Night, Potter
- D. Good Morning, Potter
Answer: C
Explanation:
NEW QUESTION 17
Given:
and
Which four identifiers from the Fooand Barclasses are visible at line 1? (Choose four.)
- A. i
- B. A
- C. j
- D. f
- E. h
- F. e
- G. c
- H. g
- I. d
- J. B
Answer: B,G,H,J
NEW QUESTION 18
Given:
Which statement is true about the Fox class?
- A. Fox class must provide implementation for the inhabit method.
- B. Fox class does not have to override inhabit method, so long as it does not try to call it.
- C. Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.
- D. The inhabit method implementation from the first interface that Fox implements will take precedence.
- E. Fox class must implement either Forest or Town interfaces, but not both.
Answer: C
NEW QUESTION 19
Given:
Which two are correct? (Choose two.)
- A. Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5, but the order is unpredictable.
- B. Replacing forEach() with forEachOrdered(), the program prints 1 2 3 4 5.
- C. Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5.
- D. The output will be exactly 2 1 3 4 5.
- E. The program prints 1 4 2 3, but the order is unpredictable.
Answer: B,E
Explanation:
NEW QUESTION 20
Given:
What is the output?
banana orange apple lemon
- A. -----
----- - B. banana orange apple lemon
-----
apple banana lemon orange
----- - C. -----
----- - D. -----
apple banana lemon orange
-----
----- - E. -----
banana orange apple lemon apple banana lemon orange
banana orange apple lemon apple banana lemon orange
Answer: E
Explanation:
NEW QUESTION 21
Given these two classes:
And given this fragment:
Which describes the fragment?
- A. It throws IllegalMonitorStateException.
- B. The code does not compile.
- C. It is subject to deadlock.
- D. It is subject to livelock.
Answer: B
NEW QUESTION 22
Which set of commands is necessary to create and run a custom runtime image from Java source files?
- A. jar, jlink
- B. javac, jlink
- C. javac, jar
- D. java, jdeps
Answer: B
NEW QUESTION 23
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. Optional<String> result = fruits.stream().filter(f > f.contains ("n")).findFirst ();
- B. Optional<String> result = fruits.stream().anyMatch(f > f.contains("n"));
- C. fruits.stream().filter(f > f.contains("n")).forEachOrdered(System.out::print);
- D. String result = fruits.stream().filter(f > f.contains("n")).findAny();
Answer: C
Explanation:
NEW QUESTION 24
Given:
Automobile.java
Car.java
What must you do so that the code prints 4?
- A. Replace the code in line 2 with Car ob = new Car();
- B. Remove abstract keyword in line 1.
- C. Remove the parameter from wheels method in line 3.
- D. Add @Override annotation in line 2.
Answer: D
Explanation:
NEW QUESTION 25
Given:
You wants to make the reduction operation parallelized.
Which two modifications will accomplish this?
- A. Replace line 1with int sum = numbers. ParallelStream ( ). Reduce (0, (n, m ) -> n + m);
- B. Replace line 1 with int sum = numbers. Parallel ( ). Stream ( ). Reduce (0, (n, m ) -> n + m);
- C. Replace line 1with int sum = number. Stream ( ) . flatMap (a -> a) .reduce (0, (n, m) -> n +m );
- D. Replace line 1with int sum = number.stream. parallel ( ). Reduce (0, (n, m) -> n + m);
- E. Replace line 1 with int sum = numbers. Stream (). Interate (0, a -> a+1. Reduce (0, (n m) -> n+m);
Answer: C,E
NEW QUESTION 26
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. peek(Member::print)
- B. map(testName::compareToIgnoreCase)
- C. filter(Member::getYearsMembership() >= testMembershipLength)
- D. filter(Integer::equals(0))
Answer: B,C
NEW QUESTION 27
Given:
What is the result?
- A. 5 12
- B. 0 5
- C. 6 13
- D. compilation error
Answer: D
Explanation:
NEW QUESTION 28
Given:
Which two methods modify field values? (Choose two.)
- A. setTCount
- B. setAllCounts
- C. setCCount
- D. setACount
- E. setGCount
Answer: B,E
NEW QUESTION 29
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: D
NEW QUESTION 30
Given:
List<String> list1 = new ArrayList<>();
list1.add("A");
list1.add("B");
List list2 = List.copyOf(list1);
list2.add("C");
List<List<String>> list3 = List.of(list1, list2);
System.out.println(list3);
What is the result?
- A. [[A, B],[A, B]]
- B. [[A, B, C], [A, B, C]]
- C. [[A, B], [A, B, C]]
- D. An exception is thrown at run time.
Answer: D
Explanation:
NEW QUESTION 31
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