Free 1z1-819 Sample Questions and 100% Cover Real Exam Questions (Updated 262 Questions)
Download Real Oracle 1z1-819 Exam Dumps Test Engine Exam Questions
Oracle 1Z0-819 certification exam is a valuable credential that confirms the candidate's proficiency in Java SE 11 programming and demonstrates their commitment to professional development. By passing the exam, candidates can prove their skills to potential employers, increase their earning potential, and take their Java programming career to new heights.
The Oracle 1z1-819 exam covers a range of topics including Java fundamentals, object-oriented programming concepts, exceptions, concurrency, and collections, among others. It also tests candidates' ability to write code, debug and troubleshoot programs, and use various Java technologies and tools.
NEW QUESTION # 27
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 GeneralException on line 1.
Add extends Exception on line 2. - C. Add extends SpecificException on line 1.
Add extends GeneralException on line 2. - D. Add extends Exception on line 1.
Add extends GeneralException on line 2.
Answer: D
Explanation:
NEW QUESTION # 28
Given:
You want to calculate the average of the Player's score.
Which statement inserted on line 1 will accomplish this?
- A. players.stream().map(a -> a.score).average();
- B. players.stream().mapToInt(a -> a.score).average().orElse(0.0);
- C. players.stream().average().orElse(0.0);
- D. players.stream().mapToDouble(a -> a.score).average();
Answer: B
NEW QUESTION # 29
Given:
What is the result?
- A. 2,34,54,3
- B. 2,34,54,5
- C. 2,34,34,5
- D. 2,54,54,5
Answer: D
Explanation:
NEW QUESTION # 30
Given:
What is the output?
- A. Message from Copier: Attempt00
- B. A compilation error is thrown.
- C. Message from Abstract Copier: Attempt00
- D. A runtime error is thrown.
Answer: B
NEW QUESTION # 31
Given the code fragment:
Which action enables Computatorclass to compile?
- A. change Line 3 to Double sum = 0.0;
- B. change Line 4 to for (Double n : collection) {
- C. change Line 2 to public Double sum ( C collection) {
- D. change Line 1 to add throws NumberFormatException
- E. change Line 5 to List<Double> numbers = List.of(5, 4, 6, 3, 7, 2, 8, 1, 9);
Answer: C
NEW QUESTION # 32
Given:
and
Which two method definitions at line n1 in the Bar class compile? (Choose two.)
- A. public List<Integer> foo(Set<CharSequence> m) {...}
- B. public List<Number> foo(Set<String> m) {...}
- C. public List<Integer> foo(TreeSet<String> m) {...}
- D. public List<Object> foo(Set<CharSequence> m) {...}
- E. public ArrayList<Number> foo(Set<CharSequence> m) {...}
- F. public ArrayList<Integer> foo(Set<String> m) {...}
Answer: C,E
NEW QUESTION # 33
Given:
and the code fragment:
What is the result?
9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt
- A. 9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt
9001: APPLICATION ERROR-9001-MyFile.txt - B.
- C. 9001: APPLICATION ERROR-9001-MyFile.txt
- D. Compilations fails at Line 1.
Answer: D
NEW QUESTION # 34
Given the Person class with age and name along with getter and setter methods, and this code fragment:
What will be the result?
- A. Aman Peter Tom
- B. Aman Tom Peter
- C. Tom Aman Peter
- D. Tom Peter Aman
Answer: A
NEW QUESTION # 35
Given:
What is the type of x?
- A. List<String>
- B. char
- C. String
- D. List<Character>
Answer: C
NEW QUESTION # 36
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 A
- C. Option C
- D. Option B
Answer: C
NEW QUESTION # 37
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. After Line 4, add indexReader.close().
- C. On Line 3, enclose processData(dataReader) with try with resources.
- 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: C
NEW QUESTION # 38
Given TripleThis.java:
Compiling TripleThis.java gives this compiler warning:
Note: TripleThis.java uses unchecked or unsafe operations.
Which two replacements done together remove this compiler warning?
- A. Replace line 12 with public static void printValue function<Integer> f, int num) {.
- B. Replace line 12 with public static <T> void printValue (Function<T, T> f, T num ) {,
- C. Replace line 12 with public static int printValue function<Integer, Integer>, f, T num {.
- D. Replace line 9 with function<Integer> tripler = x-> - { return (Integer) X * 3 ; }.
- E. Replace line 9 with function<Integer>, Integer> = X -> { return (integer) x * 3; }.
Answer: C,D
NEW QUESTION # 39
Given:
What is the result?
- A. Unknown
- B. The compilation fails.
- C. TuesdayUnknown
- D. Tuesday
- E. WorkingUnknown
- F. Working
Answer: A
Explanation:
NEW QUESTION # 40
Given:
What is the output?
- A. appleorangebanana
:APPLE:ORANGE:BANANA - B. :APPLE:ORANGE:BANANA
appleorangebanana - C. apple:APPLE orange:ORANGE banana:BANANA
- D. :APPLE:ORANGE:BANANA
- E. APPLE:apple ORANGE:orange BANANA:banana
Answer: C
Explanation:
NEW QUESTION # 41
Given:
What is the result?
- A. nothing
- B. It fails to compile.
- C. java.lang.IllegalAccessException is thrown.
- D. Student
- E. null
Answer: B
NEW QUESTION # 42
Given:
Which three are true? (Choose three.)
- A. f2.foo(c) prints Hello world!
- B. f2.foo(c) prints Old Mundo!
- C. f1.foo(c) prints Old Mundo!
- D. b1.foo(c) prints Hello world!
- E. b1.foo(c) prints Bonjour le monde!
- F. f1.foo(c) prints Bonjour le monde!
- G. f1.foo(c) prints Hello world!
- H. b1.foo(c) prints Old Mundo!
- I. f2.foo(c) prints Bonjour le monde!
Answer: G,H,I
NEW QUESTION # 43
Given:
executed with this command:
java Main one two three
What is the output of this class?
- A. 1) one
- B. nothing
- C. A java.lang.ArrayIndexOutOfBoundsException is thrown.
- D. The compilation fails.
- E. 1) one2) two3) three
Answer: E
NEW QUESTION # 44
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. 0
- C. 1
- D. 2
Answer: D
Explanation:
Explanation
Graphical user interface, text, application, chat or text message Description automatically generated
NEW QUESTION # 45
Which two are functional interfaces? (Choose two.)
- A. Option E
- B. Option D
- C. Option A
- D. Option C
- E. Option B
Answer: A,D
NEW QUESTION # 46
......
The Oracle 1z1-819 exam consists of 80 multiple-choice questions, which must be completed within 150 minutes. The questions are designed to test the candidate's knowledge of Java SE 11, including topics such as Java fundamentals, Java collections, concurrency, and I/O. To pass the exam, candidates must score at least 63%.
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