The Ultimate Oracle 1Z0-819 Dumps PDF Review
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To pass the 1Z0-819 exam, candidates must demonstrate a strong understanding of Java programming concepts and best practices. They must also be able to apply their knowledge to solve real-world problems and design robust and scalable applications. 1Z0-819 exam consists of 80 multiple-choice questions and has a duration of 180 minutes. The passing score for the exam is 63%, and the certification is valid for three years.
NEW QUESTION # 106
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
NEW QUESTION # 107
Given:
What is the result?
- A. java.lang.ArrayIndexOutOfBoundsException thrown
- B. [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet
- C. [0,0] = Red[1,0] = Black[2,0] = Blue
- D. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
Answer: B
Explanation:
NEW QUESTION # 108
Given:
What is the result?
- A. abcd
- B. adf
- C. The compilation fails.
- D. abd
- E. abdf
Answer: A
NEW QUESTION # 109
Given:
What is the output?
- A. Exception
- B. 0
- C. 1
- D. 2
Answer: D
Explanation:
NEW QUESTION # 110
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 3, add dataReader.close().
- C. Before Line 1, check the size of dataFiles to make sure it does not exceed a threshold.
- D. On Line 3, enclose processData(dataReader) with try with resources.
- E. After Line 4, add indexReader.close().
Answer: D
NEW QUESTION # 111
Which interface in the java.util.function package can return a primitive type?
- A. LongConsumer
- B. BiFunction
- C. ToDoubleFunction
- D. Supplier
Answer: C
NEW QUESTION # 112
Given the code fragment:
You must define the A exception class. The program execution must be terminated if the condition at line 19 is true and an a exception is thrown at line 20.
Which code fragment at line n1 defines A as per the requirement?
- A. Class A extends Exception {
- B. Class A extends ArithmeticException {
- C. Class A extends Throwable {
- D. Class A extends RuntimeException {
Answer: A
NEW QUESTION # 113
Given:
What is the result?
- A. The compilation fails.
- B. AnotherClass#methodA()AnotherClass#methodA()
- C. SomeClass#methodA()AnotherClass#methodA()
- D. SomeClass#methodA()SomeClass#methodA()
- E. AnotherClass#methodA()SomeClass#methodA()
- F. A ClassCastException is thrown at runtime.
Answer: A
Explanation:
NEW QUESTION # 114
Given:
What is the output?
- A. 1 2 [1, 2, 3, four] 3 four
- B. 1 2 [1, 2, 3, 4] 3 4
- C. 1 2 [1, 2, 3, 4] 3 four
- D. 1 2 [1, 2, 3, four] 3 4
Answer: B
NEW QUESTION # 115
Given:
Which is true?
- A. The compilation succeeds.
- B. The compilation fails due to an error in line 10.
- C. The compilation fails due to an error in line 7.
- D. The compilation fails due to an error in line 6.
- E. The compilation fails due to an error in line 2.
- F. The compilation fails due to an error in line 4.
- G. The compilation fails due to an error in line 9.
Answer: D
NEW QUESTION # 116
Which code fragment compiles?
- A. Option C
- B. Option D
- C. Option A
- D. Option B
Answer: B
Explanation:
NEW QUESTION # 117
Given:
Which is true about line 1?
- A. If the value is not present, nothing is done.
- B. If the value is not present, a NoSuchElementException is thrown at run time.
- C. It always executes the System.out::print statement.
- D. If the value is not present, a NullPointerException is thrown at run time.
Answer: A
Explanation:
NEW QUESTION # 118
Given:
What is the result?
- A. The compilation fails.
- B. AnotherClass#methodA()AnotherClass#methodA()
- C. SomeClass#methodA()AnotherClass#methodA()
- D. SomeClass#methodA()SomeClass#methodA()
- E. AnotherClass#methodA()SomeClass#methodA()
- F. A ClassCastException is thrown at runtime.
Answer: A
Explanation:
NEW QUESTION # 119
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 C
- C. Option B
- D. Option A
Answer: C
NEW QUESTION # 120
Given:
Which code, when inserted at one or more marked positions, would allow classes B and C to compile?
- A. @Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3
- B. @Override // position 2public void z() { } // position 3
- C. public void z() { } // position 3
- D. implements A // position 1@Override // position 2
Answer: B
NEW QUESTION # 121
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. fruits.stream().filter(f -> f.contains("n")).forEachOrdered(System.out::print);
- C. String result = fruits.stream().filter(f -> f.contains("n")).findAny();
- D. Optional<String> result = fruits.stream().anyMatch(f -> f.contains("n"));
Answer: B
Explanation:
NEW QUESTION # 122
Given:
Path p1 = Paths.get("/scratch/exam/topsecret/answers");
Path p2 = Paths.get("/scratch/exam/answers/temp.txt");
Path p3 = Paths.get("/scratch/answers/topsecret");
Which two statements print ..\..\..\answers\topsecret? (Choose two.)
- A. System.out.print(p3.relativize(p2));
- B. System.out.print(p3.relativize(p1));
- C. System.out.print(p1.relativize(p2));
- D. System.out.print(p1.relativize(p3));
- E. System.out.print(p2.relativize(p3));
- F. System.out.print(p2.relativize(p1));
Answer: B,D
NEW QUESTION # 123
Given the code fragment:
public void foo(Function<Integer, String> fun) {...}
Which two compile? (Choose two.)
- A. foo( n -> Integer.toHexString(n) )
- B. foo( n -> Integer::toHexString )
- C. foo( Integer::toHexString )
- D. foo( int n -> Integer.toHexString(n) )
- E. foo( (int n) -> Integer.toHexString(n) )
- F. foo( n::toHexString )
- G. foo( toHexString )
- H. foo( n -> n + 1 )
Answer: A,H
Explanation:
Explanation/Reference:
NEW QUESTION # 124
Given the code fragment:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
NEW QUESTION # 125
Given:
What is the output?
- A. Bonjour le monde!Bonjour le monde!
- B. Bonjour le monde!Hello world!
- C. Hello world!Bonjour le monde!
- D. Hello world!Hello world!
Answer: B
Explanation:
NEW QUESTION # 126
Which two var declarations are correct? (Choose two.)
- A. var a;
- B. var y = null;
- C. var var = "hello";
- D. var names = new ArrayList<>();
- E. var _ = 100;
Answer: C,D
NEW QUESTION # 127
......
Oracle 1z1-819 exam is a challenging but rewarding experience for Java developers who want to demonstrate their skills and knowledge of Java programming language. Passing the exam and obtaining the Java SE 11 Developer certification can provide a significant boost to a developer's career and open up new opportunities for professional growth.
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