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Best Quality Oracle 1Z0-819 Exam Questions
NEW QUESTION 88
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 A
- B. Option D
- C. Option B
- D. Option C
Answer: A
NEW QUESTION 89
Given:
What is the result?
- A. The compilation fails due to an error in line 3.
- B. The compilation fails due to an error in line 2.
- C. The compilation fails due to an error in line 5.
- D. The compilation fails due to an error in line 1.
- E. 0
- F. The compilation fails due to an error in line 4.
- G. 1
Answer: G
NEW QUESTION 90
Given:
Which code, when inserted at one or more marked positions, would allow classes B and C to compile?
- A. public void z() { } // position 3
- B. implements A // position 1@Override // position 2
- C. @Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3
- D. @Override // position 2public void z() { } // position 3
Answer: D
NEW QUESTION 91
Given the code fragment:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
NEW QUESTION 92
Given:
What is the result?
- A. nothing
- B. appleapricotgrapelemonorangewatermelon
- C. appleorangegrapelemonapricotwatermelon
- D. watermelonorangelemongrapeapricotapple
Answer: D
Explanation:
NEW QUESTION 93
Given:
What is the result?
- A. 1.99,2.99,0
- B. 1.99,2.99
- C. 1.99,2.99,0.0
- D. The compilation fails.
Answer: D
Explanation:
NEW QUESTION 94
Given:
What is the result?
- A. 6=(x+y)=42
- B. 6=(x+y)=6
- C. An exception is thrown at runtime.
- D. 42=(x+y)=6
- E. 42=(x+y)=42
Answer: A
Explanation:
NEW QUESTION 95
Given:
executed with this command:
java Main one two three
What is the output of this class?
- A. nothing
- B. The compilation fails.
- C. 1) one2) two3) three
- D. 1) one
- E. A java.lang.ArrayIndexOutOfBoundsException is thrown.
Answer: C
NEW QUESTION 96
Which two safely validate inputs? (Choose two.)
- A. Accept only valid characters and input values.
- B. Use trusted domain-specific libraries to validate inputs.
- C. Delegate numeric range checking of values to the database.
- D. Assume inputs have already been validated.
- E. Modify the input values, as needed, to pass validation.
Answer: A,C
Explanation:
Reference:
/validating-input-using-java-util-scanner
NEW QUESTION 97
Given:
What action ensures successful compilation?
- A. Replace enum Color with public enum Color.
- B. Replace public Color(int c) with private Color(int c).
- C. Replace int c; with private int c;.
- D. Replace int c; with private final int c;.
- E. Replace enum Color implements Serializable with public enum Color.
Answer: B
Explanation:
NEW QUESTION 98
Given:
Which two interfaces can be used in lambda expressions? (Choose two.)
- A. MyInterface2
- B. MyInterface4
- C. MyInterface1
- D. MyInterface3
- E. MyInterface5
Answer: A,D
NEW QUESTION 99
Given:
Which statement is equivalent to line 1?
- A. double totalSalary = list.stream().map(e -> e.getSalary() * ratio).reduce (bo).ifPresent (p -> p.doubleValue());
- B. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).sum;
- C. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).reduce(starts, bo);
- D. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);
Answer: D
Explanation:
NEW QUESTION 100
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. 0
- C. 1
- D. 2
Answer: B
Explanation:
NEW QUESTION 101
Given:
Which two methods modify field values? (Choose two.)
- A. setGCount
- B. setACount
- C. setTCount
- D. setCCount
- E. setAllCounts
Answer: A,E
NEW QUESTION 102
Given:
What is known about the Sportscar class?
- A. The Sportscar class is a superclass that has more functionality than the Automobile class.
- B. The Sportscar class is a subclass of Automobile and inherits its methods.
- C. The Sportscar class inherits the setTurbo method from the superclass Automobile.
- D. The Sportscar subclass cannot override setTurbo method from the superclass Automobile.
Answer: B
NEW QUESTION 103
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