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

出題：1

Which three guidelines are used to protect confidential information? (Choose three.)

A. Limit access to objects holding confidential information.

B. Clearly identify and label confidential information.

C. Treat user input as normal information.

D. Manage confidential and other information uniformly.

E. Validate input before storing confidential information.

F. Encapsulate confidential information.

G. Transparently handle information to improve diagnostics.

正解：A,E,G 解答を投票する

出題：2

Given:

What is the output?

A. Exception

B. 200

C. 100

D. 300

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：3

Which method throws an exception for not-a-number and infinite input values?

A.

B.

C.

D.

正解：D 解答を投票する

出題：4

Given:

and omitting the throws FooException clause results in a compilation error.
Which statement is true about FooException?

A. FooException is unchecked.

B. FooException is a subclass of RuntimeError.

C. The body of foo can only throw FooException.

D. The body of foo can throw FooException or one of its subclasses.

正解：D 解答を投票する

出題：5

Given the code fragment:

What is the result?

A. 2 : 3

B. 2 : -1

C. -1 : 2

D. 3 : 0

正解：B 解答を投票する

出題：6

Given:
var data = new ArrayList<>();
data.add("Peter");
data.add(30);
data.add("Market Road");
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?

A. [Peter, 25, null, 1000]

B. [Peter, 30, Market Road]

C. [Market Road, 1000]

D. An exception is thrown at run time.

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：7

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 reject the change because -noverify is a critical security risk.

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

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

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

正解：A 解答を投票する

出題：8

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：9

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

A. jar --show-module-resolution

B. java Hello.java

C. java --show-module-resolution

D. jmod describe

E. jdeps --list-deps

正解：C,E 解答を投票する

出題：10

Given:

What is the result?

A. Value of Euler = "2.71828"

B. It throws a runtime exception.

C. Value of Euler = 2.71828

D. The code does not compile.

正解：D 解答を投票する

出題：11

Given:

What is the result?

A. The compilation fails.

B. Orange Juice

C. Orange Juice Apple Pie Lemmon Ice Raspberry Tart

D. The program prints nothing.

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：12

Given:

What is the result?

A. 0

B. 0 4 9

C. nothing

D. 10

正解：C 解答を投票する

出題：13

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：14

Given the code fragment:

What should be inserted at line n1 so that the code fragment prints Name is required?

A. name, isBlanl ()

B. name. compareTo('' '') == 0

C. name.trim() == '' ''

D. name.isEmpty

正解：A 解答を投票する

出題：15

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

A. A module must be declared in module-info.java file.

B. module-info.java can be placed in any folder inside module-path.

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. java.base exports all of the Java platforms core packages.

正解：A,E 解答を投票する

出題：16

Given:

and

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

A. Option D

B. Option C

C. Option A

D. Option B

正解：D 解答を投票する

出題：17

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：18

Given the code fragment from Box. Java:

Given the code fragment from item.java:

Given the information:
The classes Box and items are encapsulated with getters and setters methods. The classes Box and Item contains required constructors source code.
and the code fragment:

Which action serializes the b1 object?

A. Override readObject () and writeObject () method in the Book class.

B. Implement the Serializable interface in the item class.

C. Handle NoteSerilaizeableException in the try clause or throw in the main() method definition.

D. Add SerialVersionID to the Box and item class

E. Remove out.flush () method invocation.

正解：B 解答を投票する

出題：19

Given:

What is the result?

A. null

B. Student

C. java.lang.IllegalAccessException is thrown.

D. It fails to compile.

E. nothing

正解：D 解答を投票する

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