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

質問 1

Which two statements are correct about modules in Java? (Choose two.)

（A）java.base exports all of the Java platforms core packages.

（B）A module must be declared in module-info.java file.

（C）module-info.java cannot be empty.

（D）By default, modules can access each other as long as they run in the same folder.

（E）module-info.java can be placed in any folder inside module-path.

正解：A、B 解答を投票する

質問 2

Which two commands are used to identify class and module dependencies? (Choose two.)

（A）java Hello.java

（B）jdeps --list-deps

（C）jmod describe

（D）jar --show-module-resolution

（E）java --show-module-resolution

正解：B、E 解答を投票する

質問 3

Given:

What is the output?

（A）I am an array

（B）I am an object

（C）I am an object array

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

正解：B 解答を投票する

質問 4

Given the code fragment:

What is the result?

（A）ghi jkl

（B）An ArrayIndexOutofBoundsException is thrown at runtime.

（C）gj hk il

（D）The compilation fails.

（E）gh ij kl

正解：B 解答を投票する

質問 5

Given:

What is the result?

（A）5 4 3 2 1 4 3 2 1 3 2 1 2 1 1

（B）5

（C）nothing

（D）5 4 3 2 1

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 6

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 7

Which line of code results in a compilation error?

（A）line n2

（B）line n1

（C）line n3

（D）line n4

正解：D 解答を投票する

質問 8

Given:

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

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

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

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

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

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

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

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

正解：A、C、G 解答を投票する

質問 9

Given:

When is the readObject method called?

（A）before this object is deserialized

（B）before this object Is serialized

（C）The method is never called.

（D）after this object is serialized

（E）after this object is deserialized

正解：E 解答を投票する

質問 10

Given:

What is the result?

（A）-2

（B）The compilation fails.

（C）An exception is thrown at runtime.

（D）-3

正解：B 解答を投票する

質問 11

Given the code fragment:

What is the output?

（A）An exception is thrown at runtime

（B）41 def 42

（C）Def 42

（D）Null

正解：D 解答を投票する

質問 12

Given:

What must be added in line 1 to compile this class?

（A）catch(FileNotFoundException e) { }catch(IndexOutOfBoundsException e) { }

（B）catch(IndexOutOfBoundsException e) { }catch(FileNotFoundException e) { }

（C）catch(FileNotFoundException | IndexOutOfBoundsException e) { }

（D）catch(IOException e) { }

（E）catch(FileNotFoundException | IOException e) { }

正解：D 解答を投票する

質問 13

Given:

What is the type of x?

（A）char

（B）List<Character>

（C）List<String>

（D）String

正解：D 解答を投票する

質問 14

Given:

Which statement on line 1 is calling the method of the supplier object correctly?

（A）System.out.printin(supplier.accept() );

（B）System.out.printin(supplier.test() );

（C）System.out.printin(supplier.get() );

（D）System.out.printin(supplier.apply() );

正解：C 解答を投票する

質問 15

Given:
Automobile.java

Car.java

What must you do so that the code prints 4?

（A）Replace the code in line 2 with Car ob = new Car();

（B）Add @Override annotation in line 2.

（C）Remove the parameter from wheels method in line 3.

（D）Remove abstract keyword in line 1.

正解：B 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 16

Given:

What is the result:
X is 2

（A）Error parsing value 0

（B）The compilation fails due to an error in line 2.

（C）X is 10.

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

正解：B 解答を投票する

質問 17

Given:
var fruits = List.of("apple", "orange", "banana", "lemon");
You want to examine the first element that contains the character n. Which statement will accomplish this?

（A）fruits.stream().filter(f -> f.contains("n")).forEachOrdered(System.out::print);

（B）Optional<String> result = fruits.stream().filter(f -> f.contains ("n")).findFirst ();

（C）String result = fruits.stream().filter(f -> f.contains("n")).findAny();

（D）Optional<String> result = fruits.stream().anyMatch(f -> f.contains("n"));

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 18

Given the code fragment:

You must define the A exception class. The program execution must be terminated if the condition at line 19 is true and an a exception is thrown at line 20.
Which code fragment at line n1 defines A as per the requirement?

（A）Class A extends RuntimeException {

（B）Class A extends Throwable {

（C）Class A extends ArithmeticException {

（D）Class A extends Exception {

正解：D 解答を投票する

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

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