1z1-819無料問題集「Oracle Java SE 11 Developer」

質問 1

Given:

What is the result?

（A）is it 1

（B）An IndexOutOfBoundsException is thrown at runtime.

（C）this is it 2

（D）this is it 3

（E）is it 0

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 2

Given:

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

（A）setACount

（B）setCCount

（C）setGCount

（D）setAllCounts

（E）setTCount

正解：C、D 解答を投票する

質問 3

Given:

What is the result?

（A）ab action

（B）The compilation fails on line 1.

（C）The compilation fails on line 2.

（D）a action

（E）An exception is thrown at run time.

正解：D 解答を投票する

質問 4

Which set of commands is necessary to create and run a custom runtime image from Java source files?

（A）jar, jlink

（B）javac, jlink

（C）java, jdeps

（D）javac, jar

正解：B 解答を投票する

質問 5

Given the code fragment:

Which can replace line 11?

（A）UnaryOperator<Interger >uo = var x -> { return x 3 ; };

（B）UnaryOperator<Interger > uo = (var x ) -> (x * 3);

（C）UnaryOperator<Interger >uo = (int x) -> x * 3;

（D）UnaryOperator<Interger >uo = x -> { return x * 3; };

正解：B 解答を投票する

質問 6

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?

（A）Option D

（B）Option B

（C）Option C

（D）Option A

正解：B 解答を投票する

質問 7

Given:

What is the result?

（A）1.99,2.99,0.0

（B）1.99,2.99,0

（C）1.99,2.99

（D）The compilation fails.

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 8

Given:

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

（A）final void methodE();

（B）public String methodD();

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

（D）private abstract void methodC();

（E）public int x;

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

（G）public abstract void methodB();

正解：B、G 解答を投票する

質問 9

Given the code fragment:

What change on line 1 will make this code compile?

（A）Add catch (L e).

（B）Add catch (N | L | M e).

（C）Add catch (L |N e).

（D）Add catch (L |M N e).

（E）Add catch (M |L e).

正解：A 解答を投票する

質問 10

Given:

You want to implement the jav
a. Io, serializable interface to the MypersisteneData class.
Which method should be overriden?

（A）The readExternal method

（B）The readExternal and writeExternal method

（C）The writeExternal method

（D）nothing

正解：B 解答を投票する

質問 11

Your organization provides a cloud server to your customer to run their Java code. You are reviewing the changes for the next release and you see this change in one of the config files:

Which is correct?

（A）You accept the change because -noverify is necessary for your code to run with the latest version of Java.

（B）You accept the change because -noverify is a standard option that has been supported since Java 1.0.

（C）You reject the change because -Xms8g -Xmx8g uses too much system memory.

（D）You reject the change because -noverify is a critical security risk.

正解：D 解答を投票する

質問 12

Given:

What is the result?

（A）3

（B）1

（C）b2

（D）b3

（E）2

（F）The compilation fails due to an error in line 1.

（G）b1

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 13

Given:

What code inserted into class C would allow it to compile?

（A）void x() { super.y(); }
public void z() { }

（B）public void x() { }
public void z() { }

（C）public void x() { }
protected void y() { super.y(); }
public void z() { }

（D）void x() { }
public void z() { }

（E）void x() { }
public void y() { }
public void z() { }

正解：B 解答を投票する

質問 14

var numbers = List.of(0,1,2,3,4,5,6,7,8,9);
You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.)

（A）double avg = numbers.parallelStream().mapToInt (m -> m).average().getAsDouble ();

（B）double avg = numbers.stream().mapToInt (i -> i).average().parallel();

（C）double avg = numbers.stream().parallel().averagingDouble(a -> a);

（D）double avg = numbers.stream().collect(Collectors.averagingDouble(n -> n));

（E）double avg = numbers.stream().average().getAsDouble();

正解：A、E 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 15

Examine these module declarations:

Which two statements are correct? (Choose two.)

（A）The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.

（B）The Consumer module should require the ServiceProvider module.

（C）The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.

（D）The ServiceProvider module should export the com.myimpl package.

（E）The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the

正解：A、B 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

1z1-819 無料問題集「Oracle Java SE 11 Developer」

弊社を連絡する

関連リンク

トップ試験