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1z0-819 Exam Dumps - Oracle Java SE Questions and Answers

Question # 4

Given:

Which three actions implement Java SE security guidelines? (Choose three.)

Options:

A.

Change line 7 to return names.clone();.

B.

Change line 4 to this.names = names.clone();.

C.

Change the getNames() method name to get$Names().

D.

Change line 6 to public synchronized String[] getNames() {.

E.

Change line 2 to private final String[] names;.

F.

Change line 3 to private Secret(String[] names) {.

G.

Change line 2 to protected volatile String[] names;.

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Question # 5

And the code fragment:

Which situation will occur on code fragment execution?

Options:

A.

Livelock

B.

Deadlock

C.

Race Condition

D.

Starvation

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Question # 6

Given:

Which one is correct?

Options:

A.

An IllegalThreadStateException is thrown at run time.

B.

Three threads are created.

C.

The compilation fails.

D.

Four threads are created.

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Question # 7

Given:

Which two methods modify field values? (Choose two.)

Options:

A.

setAllCounts

B.

setACount

C.

setGCount

D.

setCCount

E.

setTCount

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Question # 8

Given:

What is the result?

Options:

A.

null

B.

Joe Bloggs

C.

The compilation fails due to an error in line 1.

D.

p1

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Question # 9

Your organization makes mlib.jar available to your cloud customers. While working on a code cleanup project for mlib.jar, you see this method by customers:

What security measures should be added to this method so that it meets the requirements for a customer accessible method?

Options:

A.

B.

Create a method that validates the hostName and portNumber parameters before opening the socket.

C.

Make enableService private.

D.

Enclose the call to new Socket In an AccessController.doPrivileged block.

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Question # 10

Given:

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

Options:

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);

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Question # 11

Given:

and

Which code fragment on line 1 makes the s1 set contain the names of all employees born before January 1, 1989?

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 12

Given the code fragment:

What is the result?

A)

B)

C)

D)

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 13

A bookstore's sales are represented by a list of Sale objects populated with the name of the customer and the books they purchased.

public class Sale {

private String customer;

private List<book> items;

// constructor, setters and getters not shown

}

public class Book {

private String name;

private double price;

// constructor, setters and getters not shown

}

Given a list of Sale objects, tList, which code fragment creates a list of total sales for each customer in ascending order?

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Exam Code: 1z0-819
Exam Name: Java SE 11 Developer
Last Update: Feb 22, 2025
Questions: 296
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