File Info
| Exam | Java SE 11 Programmer II |
| Number | 1z0-816 |
| File Name | Oracle.1z0-816.TestKing.2020-04-22.48q.vcex |
| Size | 5 MB |
| Posted | Apr 22, 2020 |
| Download | Oracle.1z0-816.TestKing.2020-04-22.48q.vcex |
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Demo Questions
Question 1
Given the code fragment:
Path currentFile = Paths.get(“/scratch/exam/temp.txt”);
Path outputFile = Paths get(“/scratch/exam/new.txt”);
Path directory = Paths.get(“/scratch/”);
Files.copy(currentFile, outputFile);
Files.copy(outputFile, directory);
Files.delete (outputFile);
The /scratch/exam/temp.txt file exists. The /scratch/exam/new.txt and /scratch/new.txt files do not exist.
What is the result?
- /scratch/exam/new.txt and /scratch/new.txt are deleted.
- The program throws a FileaAlreadyExistsException.
- The program throws a NoSuchFileException.
- A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.
Correct answer: C
Explanation:
Question 2
Which two are functional interfaces? (Choose two.)
Correct answer: CE
Explanation:
Reference: http://tutorials.jenkov.com/java-functional-programming/functional-interfaces.html Reference: http://tutorials.jenkov.com/java-functional-programming/functional-interfaces.html
Question 3
Given:
Which two interfaces can be used in lambda expressions? (Choose two.)
- MyInterface1
- MyInterface3
- MyInterface5
- MyInterface2
- MyInterface4
Correct answer: CD
Explanation:
Reference: https://dzone.com/articles/functional-interface-and-lambda-expression Reference: https://dzone.com/articles/functional-interface-and-lambda-expression
Question 4
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?
Correct answer: B
Question 5
Given:
Which one is correct?
- An IllegalThreadStateException is thrown at run time.
- Three threads are created.
- The compilation fails.
- Four threads are created.
Correct answer: A
Explanation:
Question 6
Which code fragment does a service use to load the service provider with a Print interface?
- private Print print = com.service.Provider.getInstance();
- private java.util.ServiceLoader<Print> loader = ServiceLoader.load(Print.class);
- private java.util.ServiceLoader<Print> loader = new java.util.ServiceLoader<>();
- private Print print = new com.service.Provider.PrintImpl();
Correct answer: B
Explanation:
Reference: https://docs.oracle.com/javase/8/docs/api/?java/util/ServiceLoader.html Reference: https://docs.oracle.com/javase/8/docs/api/?java/util/ServiceLoader.html
Question 7
Examine these module declarations:
Which two statements are correct? (Choose two.)
- The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
- The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.
- The Consumer module should require the ServiceProvider module.
- The ServiceProvider module should export the com.myimpl package.
- The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the com.example.api API.
Correct answer: AC
Question 8
Given:
What is the output?
- null
- A NoSuchElementException is thrown at run time.
- Duke
- A NullPointerException is thrown at run time.
Correct answer: C
Explanation:
Question 9
Given:
What is the result?
- The compilation fails at line 9.
- The compilation fails at line 2.
- Hello World
- The compilation fails at line 8.
Correct answer: C
Explanation:
Question 10
Assume ds is a DataSource and the EMP table is defined appropriately.
What does executing this code fragment do?
- inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', NULL)
- inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', 'HR')
- inserts one row (101, 'SMITH', 'HR')
- throws a SQLException
Correct answer: C
