[2021.7 Updated] Valid Lead4Pass Oracle 1Z0-819 exam questions with VCE and PDF download

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Latest update Oracle 1Z0-819 exam questions and answers online practice test

QUESTION 1
Given:

What is the result?
A. null
B. nothing
C. It fails to compile.
D. java.lang.IllegalAccessException is thrown.
E. Student
Correct Answer: C

 

QUESTION 2
Given: What is the result?

A. NullPointerException is thrown at line 4.
B. NullPointerException is thrown at line 10.
C. A compilation error occurs.
D. Hello
Correct Answer: D

 

QUESTION 3
Given:

What is the result?
A. 2134
B. 2143
C. 214
D. 234
Correct Answer: C

 

QUESTION 4
Given:

Which code fragment can be inserted into the switch statement to print Best?
A. QUALITY.A.ValueOf()
B. A
C. A.toString()
D. QUALITY.A
Correct Answer: B

 

QUESTION 5
Given:

What is the result?
A. 2,34,34,5 B. 2,34,54,5
C. 2,54,54,5
D. 2,34,54,3
Correct Answer: C

 

QUESTION 6
You are working on a functional bug in a tool used by your development organization. In your investigation, you find that
the tool is executed with a security policy file containing this grant.

What action should you take?
A. Nothing, because it is an internal tool and not exposed to the public.
B. Remove the grant because it is excessive.
C. Nothing, because it is not related to the bug you are investigating.
D. File a security bug against the tool referencing the excessive permission granted.
E. Nothing, because listing just the required permissions would be an ongoing maintenance challenge.
Correct Answer: D
Reference: https://wiki.sei.cmu.edu/confluence/display/java/ENV03- J.+Do+not+grant+dangerous
+combinations+of+permissions

 

QUESTION 7
Given: When run and all three files exist, what is the state of each reader on Line 1?

A. All three readers are still open.
B. All three readers have been closed.
C. The compilation fails.
D. Only reader1 has been closed.
Correct Answer: C

 

QUESTION 8
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?
A. /scratch/exam/new.txt and /scratch/new.txt are deleted.
B. The program throws a FileaAlreadyExistsException.
C. The program throws a NoSuchFileException.
D. A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.
Correct Answer: C

 

QUESTION 9
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 Aman Peter
C. Aman Peter Tom
D. Tom Peter Aman
Correct Answer: C

QUESTION 10
Given: What is the result?

A. nothing
B. 0
C. 10
D. 0 4 9
Correct Answer: A

 

QUESTION 11
Given: You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?

A. var lines = Files.lines(Paths.get(INPUT_FILE_NAME));
B. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
C. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
D. Stream lines = Files.lines(INPUT_FILE_NAME);
Correct Answer: C

 

QUESTION 12
Given:

Which expression when added at line 1 will produce the output of 1.17?
A. float z = (float)(Math.round((float)x/y*100)/100);
B. float z = Math.round((int)(x/y),2);
C. float z = Math.round((float)x/y,2);
D. float z = Math.round((float)x/y*100)/(float)100;
Correct Answer: D

 

QUESTION 13
Examine this excerpt from the declaration of the java.se module:

What does the transitive modifier mean?
A. Only a module that requires the java.se module is permitted to require the java.sql module.
B. Any module that requires the java.se module does not need to require the java.sql module.
C. Any module that attempts to require the java.se module actually requires the java.sql module instead.
D. Any module that requires the java.sql module does not need to require the java.se module.
Correct Answer: A

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