2024 Latest 1Z0-819 Exam Dumps Recently Updated 297 Questions
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NEW QUESTION # 151
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?
module PrintServiceProvider {
- A. requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
}
module PrintServiceProvider { - B. requires PrintServiceAPI;
uses com.provider.PrintService;
}
module PrintServiceProvider { - C. requires PrintServiceAPI;
exports org.printservice.spi;
}
module PrintServiceProvider { - D. requires PrintServiceAPI;
exports org.printservice.spi.Print with
com.provider.PrintService;
}
Answer: C
NEW QUESTION # 152
Assuming the Widget class has a getPrice method, this code does not compile:
Which two statements, independently, would allow this code to compile? (Choose two.)
- A. Replace line 5 with widgetStream.filter((Widget a) -> a.getPrice() > 20.00).
- B. Replace line 4 with Stream<Widget> widgetStream = widgets.stream();.
- C. Replace line 5 with widgetStream.filter(a -> ((Widget)a).getPrice() > 20.00).
- D. Replace line 1 with List<Widget> widgetStream = widgets.stream();.
Answer: B,C
NEW QUESTION # 153
Given:
Assuming that this code compiles correctly, which three statements are true? (Choose three.)
- A. B cannot be final.
- B. A cannot be abstract.
- C. B is a subtype of A.
- D. A cannot be final.
- E. B cannot be abstract.
- F. A is a subtype of B.
Answer: C,D,E
NEW QUESTION # 154
Given:
Which one is correct?
- A. An IllegalThreadStateException is thrown at run time.
- B. Three threads are created.
- C. The compilation fails.
- D. Four threads are created.
Answer: A
Explanation:
NEW QUESTION # 155
Which two statements are correct about modules in Java? (Choose two.)
- A. java.base exports all of the Java platforms core packages.
- B. By default, modules can access each other as long as they run in the same folder.
- C. A module must be declared in module-info.java file.
- D. module-info.java can be placed in any folder inside module-path.
- E. module-info.java cannot be empty.
Answer: A,C
NEW QUESTION # 156
A company has an existing sales application using a Java 8 jar file containing packages:
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?
A)
B)
C)
D)
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer: C
NEW QUESTION # 157
Given:
What is the result?
- A. Hat at store 4
- B. At once 1
- C. At once 0
- D. An indexOutofBoundsException is thrown at runtime.
- E. Hat at store 1
Answer: E
NEW QUESTION # 158
A company has an existing sales application using a Java 8 jar file containing packages:
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?
A)
B)
C)
D)
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer: C
NEW QUESTION # 159
Given:
You wants to make the reduction operation parallelized.
Which two modifications will accomplish this?
- A. Replace line 1 with int sum = numbers. Stream (). Interate (0, a -> a+1. Reduce (0, (n m) -> n+m);
- B. Replace line 1with int sum = numbers. ParallelStream ( ). Reduce (0, (n, m ) -> n + m);
- C. Replace line 1with int sum = number.stream. parallel ( ). 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 1 with int sum = numbers. Parallel ( ). Stream ( ). Reduce (0, (n, m ) -> n + m);
Answer: A,D
NEW QUESTION # 160
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 Tom Peter
- B. Tom Peter Aman
- C. Tom Aman Peter
- D. Aman Peter Tom
Answer: D
NEW QUESTION # 161
Given the code fragment:
What is the result?
- A. The compilation fails at line
- B. 0
- C. The compilation fails at line 13.
- D. The compilation fails at line 16.
- E. 1
Answer: E
NEW QUESTION # 162
Given the code fragment:
What is the result?
- A. True
- B. False
- C. A java.lang, UnsupportedOperationException is thrown.
- D. A java.lang.NullPointerException is thrown.
Answer: C
NEW QUESTION # 163
Given:
Which two lines inserted in line 1 will allow this code to compile? (Choose two.)
- A. protected void walk(){}
- B. void walk(){}
- C. public abstract void walk();
- D. abstract void walk();
- E. private void walk(){}
Answer: A,C
NEW QUESTION # 164
Given the code fragment:
What is the result?
A)
B)
C)
D)
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer: C
NEW QUESTION # 165
Examine this excerpt from the declaration of the java.se module:
What does the transitive modifier mean?
- A. Any module that requires the java.se module does not need to require the java.sql module.
- B. Only a module that requires the java.se module is permitted to require the java.sql module.
- C. Any module that requires the java.sql module does not need to require the java.se module.
- D. Any module that attempts to require the java.se module actually requires the java.sql module instead.
Answer: B
NEW QUESTION # 166
Which describes an aspect of Java that contributes to high performance?
- A. Java prioritizes garbage collection.
- B. Java has a library of built-in functions that can be used to enable pipeline burst execution.
- C. Java automatically parallelizes code execution.
- D. Java monitors and optimizes code that is frequently executed.
Answer: D
NEW QUESTION # 167
Given the code fragment:
What is the result?
- A. 0 8 10
- B. 0 8
- C. 0 4 9
- D. The code prints nothing.
- E. 0
Answer: B
Explanation:
Explanation
A picture containing graphical user interface Description automatically generated
NEW QUESTION # 168
Given:
Which two methods facilitate valid ways to read instance fields? (Choose two.)
- A. getACount
- B. getTCount
- C. getCCount
- D. getGCount
- E. getTotalCount
Answer: C,E
NEW QUESTION # 169
Your organization makes mlib.jar available to your cloud customers. While working on a new feature for mlib.jar, you see that the customer visible method public void enableService(String hostName, String portNumber) executes this code fragment
and you see this grant is in the security policy file:
What security vulnerability does this expose to your cloud customer's code?
- A. SQL injection attack against the specified host and port
- B. XML injection attack against any mlib server
- C. privilege escalation attack against the OS running the customer code
- D. none because the customer code base must also be granted SocketPermission
- E. denial of service attack against any reachable machine
Answer: A
NEW QUESTION # 170
Given:
What is true?
- A. The compilation fails.
- B. This may not print the same result each time the program runs.
- C. This should print the same result each time the program runs.
- D. A NoSuchElementExceptionis thrown at run time.
Answer: B
Explanation:
NEW QUESTION # 171
Given:
Which is true?
- A. The compilation fails due to an error in line 9.
- B. The compilation succeeds.
- C. The compilation fails due to an error in line 2.
- D. The compilation fails due to an error in line 7.
- E. The compilation fails due to an error in line 4.
- F. The compilation fails due to an error in line 6.
- G. The compilation fails due to an error in line 10.
Answer: F
NEW QUESTION # 172
Given:
and
Which two method definitions at line n1 in the Bar class compile? (Choose two.)
- A. public List<Number> foo(Set<String> m) {...}
- B. public List<Integer> foo(TreeSet<String> m) {...}
- C. public ArrayList<Integer> foo(Set<String> m) {...}
- D. public List<Object> foo(Set<CharSequence> m) {...}
- E. public List<Integer> foo(Set<CharSequence> m) {...}
- F. public ArrayList<Number> foo(Set<CharSequence> m) {...}
Answer: B,F
NEW QUESTION # 173
Given the code fragment:
Which action enables Computatorclass to compile?
- A. change Line 2 to public Double sum ( C collection) {
- B. change Line 4 to for (Double n : collection) {
- C. change Line 5 to List<Double> numbers = List.of(5, 4, 6, 3, 7, 2, 8, 1, 9);
- D. change Line 1 to add throws NumberFormatException
- E. change Line 3 to Double sum = 0.0;
Answer: A
NEW QUESTION # 174
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