[Nov 06, 2024] Get New 1z1-819 Certification Practice Test Questions Exam Dumps
Real 1z1-819 Exam Dumps Questions Valid 1z1-819 Dumps PDF
Oracle 1z1-819 exam is an essential certification exam for Java developers who want to validate their skills and knowledge in Java SE 11. Java SE 11 Developer certification not only proves the candidate's ability to work with Java tools and technologies but also enhances their career prospects in the Java development industry.
NEW QUESTION # 162
Given:
What is the result?
- A. Orange Juice Apple Pie Lemmon Ice Raspberry Tart
- B. The compilation fails.
- C. Orange Juice
- D. The program prints nothing.
Answer: A
Explanation:
NEW QUESTION # 163
Which method throws an exception for not-a-number and infinite input values?
A)
B)
C)
D)
- A. Option C
- B. Option D
- C. Option A
- D. Option B
Answer: C
NEW QUESTION # 164
Given:
You wants to make the reduction operation parallelized.
Which two modifications will accomplish this?
- A. Replace line 1with int sum = number.stream. parallel ( ). 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 1 with int sum = numbers. Stream (). Interate (0, a -> a+1. Reduce (0, (n m) -> n+m);
- D. Replace line 1with int sum = number. Stream ( ) . flatMap (a -> a) .reduce (0, (n, m) -> n +m );
- E. Replace line 1with int sum = numbers. ParallelStream ( ). Reduce (0, (n, m ) -> n + m);
Answer: C,D
NEW QUESTION # 165
Which two statements are true about the modular JDK? (Choose two.)
- A. The foundational APIs of the Java SE Platform are found in the java.base module.
- B. APIs are deprecated more aggressively because the JDK has been modularized.
- C. An application must be structured as modules in order to run on the modular JDK.
- D. It is possible but undesirable to configure modules' exports from the command line.
Answer: A,D
NEW QUESTION # 166
Given:
What is the result?
- A. 42=(x+y)=6
- B. 6=(x+y)=6
- C. 42=(x+y)=42
- D. 6=(x+y)=42
- E. An exception is thrown at runtime.
Answer: D
Explanation:
NEW QUESTION # 167
Given:
and
What is the result?
- A. A ClassCastException is thrown at run time.
- B. The compilation fails.
- C. 1
1
1 - D. 1
Null
null - E. A NullPointerException is thrown at run time.
Answer: B
Explanation:
NEW QUESTION # 168
Consider this method declaration:
A) "SET SESSION AUTHORIZATION " + user
B) "SET SESSION AUTHORIZATION " + stmt.enquoteIdentifier(user)
Is A or B the correct replacement for <EXPRESSION> and why?
- A. A, because it is unnecessary to enclose identifiers in quotes.
- B. B, because enquoting values provided by the calling code prevents SQL injection.
- C. A, because it sends exactly the value of user provided by the calling code.
- D. A and B are functionally equivalent.
- E. B, because all values provided by the calling code should be enquoted.
Answer: C
NEW QUESTION # 169
Given:
Which two lines cause compilation errors? (Choose two.)
- A. line 7
- B. line 6
- C. line 12
- D. line 8
- E. line 9
Answer: A,B
NEW QUESTION # 170
Consider this method declaration:
A) "SET SESSION AUTHORIZATION " + user
B) "SET SESSION AUTHORIZATION " + stmt.enquoteIdentifier(user)
Is A or B the correct replacement for <EXPRESSION> and why?
- A. A, because it is unnecessary to enclose identifiers in quotes.
- B. B, because enquoting values provided by the calling code prevents SQL injection.
- C. A, because it sends exactly the value of user provided by the calling code.
- D. A and B are functionally equivalent.
- E. B, because all values provided by the calling code should be enquoted.
Answer: C
NEW QUESTION # 171
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 B
- B. Option C
- C. Option A
- D. Option D
Answer: A
NEW QUESTION # 172
Given the declaration:
Examine this code fragment:
/* Loc1 */ class ProcessOrders { ... }
Which two annotations may be applied at Loc1 in the code fragment? (Choose two.)
- A. @Resource(name="Customer1")
- B. @Resource
- C. @Resource(priority=100)
- D. @Resource(priority=0)
- E. @Resource(name="Customer1", priority=100)
Answer: C,D
NEW QUESTION # 173
Given:
What is the result?
- A. 0
- B. b2
- C. 1
- D. b1
- E. 2
- F. b3
- G. The compilation fails due to an error in line 1.
Answer: C
Explanation:
NEW QUESTION # 174
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 175
Given:
You want to calculate the average of the Player's score.
Which statement inserted on line 1 will accomplish this?
- A. players.stream().mapToDouble(a -> a.score).average();
- B. players.stream().average().orElse(0.0);
- C. players.stream().map(a -> a.score).average();
- D. players.stream().mapToInt(a -> a.score).average().orElse(0.0);
Answer: D
NEW QUESTION # 176
Given:
And the command:
java Main Helloworld
What is the result ?
- A. Input:
Echo: Helloworld - B. Input:
Then block until any input comes from System.in. - C. Input: Helloworld Echo: Helloworld
- D. A NullPointerException is thrown at run time.
- E. Input: Echo:
Answer: B
Explanation:
NEW QUESTION # 177
Given:
What is the result?
- A. Student
- B. It fails to compile.
- C. java.lang.IllegalAccessException is thrown.
- D. nothing
- E. null
Answer: B
NEW QUESTION # 178
Given:
What is the result?
- A. Map: 0 Keys: 4 Values: 4
- B. Map: 0 Keys: 0 Values: 0
- C. Map: 4 Keys: 0 Values: 0
- D. The compilation fails.
- E. Map: 4 Keys: 4 Values: 4
Answer: C
Explanation:
NEW QUESTION # 179
Given:
What is the result?
- A. NullPointerException is thrown at line 10.
- B. A compilation error occurs.
- C. Hello
- D. NullPointerException is thrown at line 4.
Answer: C
Explanation:
NEW QUESTION # 180
......
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