1Z0-819試験無料問題集（297題）「Oracle Java SE 11 Developer 認定」

出題：1

Which two var declarations are correct? (Choose two.)

A. var y = null;

B. var names = new ArrayList<>();

C. var _ = 100;

D. var var = "hello";

E. var a;

正解：B,D 解答を投票する

出題：2

Given:

Which three classes successfully override showFirst ()?

正解：F 解答を投票する

出題：3

Assuming the user credentials are correct, which expression will create a Connection?

正解：E 解答を投票する

出題：4

Given the code fragment:
Which two code fragments, independently, replace line 1 to implement the equivalent reduce operation?

正解：A,E 解答を投票する

出題：5

Given:

executed using command:
java Hello "Hello World" Hello World
What is the output?

A. Hello WorldHello World

B. An exception is thrown at runtime.

C. Hello WorldHelloWorld

D. Hello World Hello World

E. HelloHello WorldHelloWorld

正解：D 解答を投票する

出題：6

Given:

What is the result?

A. 3 5 3 5

B. 3 3 3 3

C. 3 5 3 3

D. 5 5 3 3

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：7

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

B. @Resource(priority=100)

C. @Resource(priority=0)

D. @Resource(name="Customer1", priority=100)

E. @Resource(name="Customer1")

正解：B,C 解答を投票する

出題：8

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 4 with Stream<Widget> widgetStream = widgets.stream();.

B. Replace line 5 with widgetStream.filter((Widget a) -> a.getPrice() > 20.00).

C. Replace line 1 with List<Widget> widgetStream = widgets.stream();.

D. Replace line 5 with widgetStream.filter(a -> ((Widget)a).getPrice() > 20.00).

正解：A,D 解答を投票する

出題：9

And the code fragment:

Which situation will occur on code fragment execution?

A. Starvation

B. Deadlock

C. Race Condition

D. Livelock

正解：A 解答を投票する

出題：10

Given the declaration:

In which two locations is it legal to apply the @Resource annotation?

A. Loc2

B. Loc2

C. Loc1

D. Loc4

E. Loc3

正解：B,E 解答を投票する

出題：11

Given the code fragment:

What is the result?

A.

B.

C.

D.

正解：C 解答を投票する

出題：12

Given the code fragment:

You want to display the value of currency as $100.00.
Which code inserted on line 1 will accomplish this?

A. NumberFormat formatter = NumberFormat.getCurrencyInstance(locale);

B. NumberFormat formatter = NumberFormat.getInstance(locale);

C. NumberFormat formatter = NumberFormat.getCurrency(locale);

D. NumberFormat formatter = NumberFormat.getInstance(locale).getCurrency();

正解：D 解答を投票する

出題：13

Given:

What is the result?

A. a action

B. ab action

C. The compilation fails on line 2.

D. The compilation fails on line 1.

E. An exception is thrown at run time.

正解：A 解答を投票する

出題：14

Given:

Which two statements are valid to be written in this interface? (Choose two.)

A. private abstract void methodC();

B. final void methodE();

C. public void methodF(){System.out.println("F");}

D. public abstract void methodB();

E. public String methodD();

F. final void methodG(){System.out.println("G");}

G. public int x;

正解：D,E 解答を投票する

出題：15

Given:

What is known about the Sportscar class?

A. The Sportscar subclass cannot override setTurbo method from the superclass Automobile.

B. The Sportscar class is a subclass of Automobile and inherits its methods.

C. The Sportscar class is a superclass that has more functionality than the Automobile class.

D. The Sportscar class inherits the setTurbo method from the superclass Automobile.

正解：B 解答を投票する

出題：16

Given this requirement:
Module vehicle depends on module part and makes its com.vehicle package available for all other modules.
Which module-info.java declaration meets the requirement?

A. Option D

B. Option C

C. Option A

D. Option B

正解：C 解答を投票する

出題：17

Given:

What is the result?

A. NullPointerException is thrown at line 4.

B. A compilation error occurs.

C. Hello

D. NullPointerException is thrown at line 10.

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：18

Given:

What is the result?

A. is it 1

B. is it 0

C. An IndexOutOfBoundsException is thrown at runtime.

D. this is it 2

E. this is it 3

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：19

Given:

What is the result?

A. The compilation fails.

B. Null

C. HH

D. Y@<< hashcode>>

正解：D 解答を投票する

出題：20

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. File a security bug against the tool referencing the excessive permission granted.

B. Nothing, because listing just the required permissions would be an ongoing maintenance challenge.

C. Remove the grant because it is excessive.

D. Nothing, because it is not related to the bug you are investigating.

E. Nothing, because it is an internal tool and not exposed to the public.

正解：A 解答を投票する

1Z0-819試験無料問題集「Oracle Java SE 11 Developer 認定」