[2024年01月03日] 完全版最新の問題集でPDFで最新1z1-819試験問題と解答 [Q34-Q58]

[2024年01月03日] 完全版最新の問題集でPDFで最新1z1-819試験問題と解答

無料で使える1z1-819試験問題集で100%合格できる試験簡単に合格させるFast2test

Oracle 1z1-819試験は、Java SE 11におけるスキルと知識を検証したいJava開発者向けに設計されています。この試験はJava開発者コミュニティで最も広く認知されており、合格することはJavaプログラミング言語の熟練度を証明する素晴らしい方法です。この試験は、Java構文、オブジェクト指向プログラミング（OOP）、Java API、およびJava開発ツールなど、幅広いトピックをカバーしています。

Oracle 1Z0-819の認定試験は、Java SE 11プログラミングの専門知識を証明し、キャリアアップの可能性を高めたいJava開発者に最適です。また、Javaプログラミングスキルを向上させ、最新のJavaテクノロジーやベストプラクティスに常にアップデートしたいプロフェッショナルにも適しています。

質問 # 34
A company has an existing sales application using a Java 8 jar file containing packages:
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?
A)

B)

C)

D)

A. Option A
B. Option B
C. Option C
D. Option D

正解：C

質問 # 35
Given:

and

What is the result?

A. A NullPointerException is thrown at run time.
B. The compilation fails.
C. 1
Null
null
D. A ClassCastException is thrown at run time.
E. 1
1
1

正解：B

解説：

質問 # 36
Given:

What is the result?

A. [0). o, | 1). i, | 2). r]
B. ArrayIndexOutOfBounds Exception is thrown at runtime.
C. [). o, | 1). a, | 2).]
D. The compilation fails.
[0). D, | 1). i, | 2). a]
E.

正解：D

質問 # 37
Which command line runs the main class com.acme.Main from the module com.example?

A. java -classpath com.example.jar com.acme.Main
B. java -classpath com.example.jar -m com.example/com.acme.Main
C. java --module-path mods -m com.example/com.acme.Main
D. java --module-path mods com.example/com.acme.Main

正解：B

質問 # 38
Given:

Which two lines can replace line 1 so that the Y class compiles? (Choose two.)

A. super.set(List<String> map)
B. super.set(map.values());
C. set(map)
D. set(map.values());
E. map.forEach((k, v) -> set(v)));

正解：B、D

質問 # 39
Given the code fragment:

What is the result?

A. ab cd ef
B. The compilation fails.
C. ad be cf
D. An ArrayIndexOutOfBoundsException is thrown at runtime.
E. abc def

正解：C

質問 # 40
Given the code fragment:

What is the result?

正解：C

質問 # 41
And the code fragment:

Which situation will occur on code fragment execution?

A. Race Condition
B. Starvation
C. Livelock
D. Deadlock

正解：B

質問 # 42
Consider this method declaration:

A) "SET SESSION AUTHORIZATION " + user
B) "SET SESSION AUTHORIZATION " + stmt.enquoteIdentifier(user)
Is A or B the correct replacement for <EXPRESSION> and why?

A. A, because it sends exactly the value of user provided by the calling code.
B. B, because all values provided by the calling code should be enquoted.
C. A and B are functionally equivalent.
D. A, because it is unnecessary to enclose identifiers in quotes.
E. B, because enquoting values provided by the calling code prevents SQL injection.

正解：A

質問 # 43
Given:

What is the result?
A)

B)

C)

D)

A. Option A
B. Option B
C. Option C
D. Option D

正解：A

質問 # 44
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. Nothing, because it is not related to the bug you are investigating.
B. Nothing, because it is an internal tool and not exposed to the public.
C. Nothing, because listing just the required permissions would be an ongoing maintenance challenge.
D. Remove the grant because it is excessive.
E. File a security bug against the tool referencing the excessive permission granted.

正解：E

質問 # 45
Given:

What is the result?

A. 0 5
B. 5 12
C. 6 13
D. compilation error

正解：D

解説：

質問 # 46
Given the Person class with age and name along with getter and setter methods, and this code fragment:

What will be the result?

A. Tom Peter Aman
B. Aman Peter Tom
C. Tom Aman Peter
D. Aman Tom Peter

正解：B

質問 # 47
Given:

Which two codes, independently, can be inserted in line to 1 compile?

A. Abacus aba = (int e, int f) -> { return e * f; };
B. Abacus aba = (int i, j) -> ( return i * j; };
C. Abacus aba = v, w -> x * y;
D. Abacus aba = (int m, int n) -> { m * n };
E. Abacus aba = (a, b) -> a * b;

正解：B、E

質問 # 48
Given:

If file "App.config" is not found, what is the result?

A. The compilation fails.
B. nothing
C. Exception in thread "main" java.lang.Error:Fatal Error: Configuration File, App.config, is missing.
D. Configuration is OK

正解：A

解説：

質問 # 49
Given:

You want to obtain the Filechannel object on line 1.
Which code fragment will accomplish this?
A)

B)

C)

D)

A. Option A
B. Option B
C. Option C
D. Option D

正解：A

質問 # 50
Given:

What code must you insert on Line 1 to enable the code to print Hello world?

A. Hello myH = new Hello();
Hello.Greeting myG = myH.new Greeting();
myG.sayHi();
B. Hello myH = new Hello();
Hello.Greeting myG = myH.new Hello.Greeting();
myG.sayHi();
C. Hello.Greeting myG = new Hello.Greeting() myG.sayHi();
D. Hello myH = new Hello(); Greeting myG = new Greeting(); myG.sayHi ();

正解：A

質問 # 51
Given the code fragment:

What is the result?

A. The code prints nothing.
B. 0 8
C. 0 8 10
D. 0 4 9
E. 0

正解：B

解説：
Explanation
A picture containing graphical user interface Description automatically generated

質問 # 52
Given the code fragment:
Path currentFile = Paths.get("/scratch/exam/temp.txt");
Path outputFile = Paths get("/scratch/exam/new.txt");
Path directory = Paths.get("/scratch/");
Files.copy(currentFile, outputFile);
Files.copy(outputFile, directory);
Files.delete (outputFile);
The /scratch/exam/temp.txt file exists. The /scratch/exam/new.txt and /scratch/new.txt files do not exist.
What is the result?

A. /scratch/exam/new.txt and /scratch/new.txt are deleted.
B. The program throws a NoSuchFileException.
C. A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.
D. The program throws a FileaAlreadyExistsException.

正解：B

解説：

質問 # 53
Why does this compilation fail?

A. The method Y. print (object...) cannot override the final method x.print (object....).
B. The method x. print (object) is not accessible to Y.
C. The method Y. print (object) does not call the method super.print (object)
D. The method print (object) and the method print (object...) are duplicates of each other.
E. In method x. print (Collection), system. Out :: prints is an invalid Java identifier.

正解：D

質問 # 54
Given:
/code/a/Test.java
containing:

and
/code/b/Best.java
containing:
package b;
public class Best { }
Which is the valid way to generate bytecode for all classes?