ベストOracle 1z1-909学習ガイドと問題集は2023年更新 [Q10-Q27]

ベストOracle 1z1-909学習ガイドと問題集は2023年更新

トップクラスOracle 1z1-909試験最先端学習ガイド！練習問題バージョン

Oracle 1Z0-909（MySQL 8.0データベース開発者）認定試験は、MySQL 8.0データベースの設計、開発、実装における専門知識を証明するための重要な資格です。この試験に合格し、認定を取得することで、候補者は新しい機会を見つけ、データベース開発の急速に成長する分野でキャリアを進めることができます。

Oracle 1z1-909（MySQL 8.0データベース開発者）認定試験に合格するためには、候補者はMySQL 8.0データベースアーキテクチャの理解を徹底し、MySQLツールと技術を使用してMySQLデータベースを設計、開発、および管理する能力を示さなければなりません。候補者はまた、SQLプログラミング、データベース管理、およびトラブルシューティングの経験を持っている必要があります。

質問 # 10
Examine this statement which executes successfully:
CREATE TABLE 'fshop' ('product' JSON DEFAULT NULL ) ENGINE=InnoDB;
Now, examine a json value contained in the table:
{"name" : "orange", "varieties" : [{"VarietyName":"Clementine", "Origin" : ["PA", "BU"] }, {"VarietyName": "tangerine", "Origin" : ["CH","JP"]>]> Which will cause documents to be indexed over the 'name' key?

A. ALTER TABLE fshop ADD COLUMN name VARCHAR(20) AS (product->' S - name' ) VIRTUAL, ADD KEY idx_name (name) ;
B. ALTER TABLE fshop ADD name VARCHAR(20) AS (JSON_ONQUOTE (product->"S.varieties.VarietyName")), ADD INDEX (name);
C. ALTER TABLE fshop ADD COLUMN name VARCHAR(20), ADD KEY idx_name (name) ;
D. ALTER TABLE fshop ADD COLUMN name VARCHAR(20) AS (product-
>* S .varieties. VarietyName ' ) VIRTUAL, ADD KEY idx_name (name.) ;
E. ALTER TABLE fshop ADD COLUMN name VARCHAR(100) AS (product->' S - varieties' ) VIRTUAL, ADD KEY idx_name (name) ;

正解：E

質問 # 11
Examine this event's metadata:

Now examine this command:
DROP USER 'userl'e'localhost';
Which effect will the command have on the event?

A. The event is not scheduled and will no longer execute. The system will log an error.
B. The event is scheduled and executed but fails. The system will log an error.
C. The event will be dropped without an error or warning.
D. The event is scheduled but will no longer execute. The system will log an error.

正解：D

質問 # 12
A server hosts MySQL Server and Apache Webserver supporting a PHP/PDO based application.
The application must be migrated from PHP to their Java application server on another host. The MySQL instance remains on the original host.
Examine the PDO connection string used in the existing application:
Mysql:host-localhost;dbname=sales;unix_socket=/var/run/mysql.sock
Which two prevent Java from using the Unix socket?

A. The socket can only be accessed from the local host.
B. The X Dev API protocol must be enabled to use sockets in Connector/J driver.
C. Java treats the socket file as insecure.
D. socket is a reserved word in Java.
E. The socket is not implemented in Connector/J driver.

正解：C、E

質問 # 13
Which two statements are true about AUTO_INCREMENT?

A. The decimal data type supports AUTO_INCREMENT.
B. A table can have multiple AUTO_INCREMENT columns.
C. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.
D. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.
E. An AUTO_INCREMENT column must be indexed.

正解：A、C

質問 # 14
Which two are true about MySQL Document Store?

A. There is no access to relational tables.
B. It allows one to bypass the SQL layer of the server.
C. It can store documents greater than 4 GB.
D. It depends heavily on strictly typed data.
E. It helps to store data items in a schema-less key-value store.

正解：B、E

質問 # 15
The employee table includes these columns:
e_id INT, e_name VARCHAR (45), dept_id INT salart INT
You must create a stored function, getMaxSalary(), which returns the maximum salary paid for a given department id.
Which statement will create the function?

正解：A

質問 # 16
Which select statement returns true?

A. SELECT NULL <> NULL;
B. SELECT NULL = NULL;
C. SELECT NULL := NULL;
D. SELECT NULL <=> NULL;

正解：C

質問 # 17
Examine the layout of the my_values table.

Examine the data in the my_value3 table.

Examine this statement:

A)

B)

D)

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

正解：D

質問 # 18
Examine these commands which execute successfully in the sequence shown in Sessions S1 and S2:

Now, examine this statement that execute successfully in s1:
S1> SELECT * FROM emp;
Which is true about the result of the select statement?

A. The inserted row is returned because the isolation level is RPEATABLE READ in S1.
B. The inserted row is not returned because the isolation level is READ COMMITTED in S2.
C. The inserted row is not returned because the transaction still active in s2.
D. The inserted row is returned because the transaction is auto committed in S2.

正解：C

質問 # 19
Examine the content of the employee table:

Now examine this PHP script:

Finally examine this desired output:

A. $options = [PDO:: ATTR_DEFAUXT_FETCH__MODE => PDO: : PDO: :FETCH_OBJ] ;
B. $options = [PDO:: ATTR__DEFAULT_FETCH MODE => PDO: :FETCH_CLASS] ;
C. $options = [PDO:: ATTR_DEFAULT_FETCH__MODE => PDO: : FETCH_ASSOC] ;
D. $options = [PDO:: ATTR_DEFAOLT_FETCH__MODE => PDO : : FETCH_BOTH] ;

正解：D

質問 # 20
Examine these commands and output:

Which is true?

A. It returns an error because the DROP TABLE statement did not drop the view.
B. It returns an error because the CREATE TABLE statement automatically recreated the view.
C. Existing emp_vuL is dropped and a new emp_vu1 created with the new definition.
D. A new view is created because the previous was dropped on execution of the drop table statement.

正解：C

質問 # 21
Examine the output:

Which explain command will obtain the output?

A. EXPLAIN PARTITIONS
B. EXPLAIN PORMAT^TRADITIONAL
C. EXPLAIN FORMAT=TREE
D. EXPLAIN ANALYZE
E. EXPLAIN PORMAT=JSON

正解：A

質問 # 22
Examine this statement and output:

You execute this statement:
SELECT JSON_SEARCH(product,'one','IT') FROM fshop ;
What is the output?

A. ''$.varieties [3]. origin[0]''
B. product->''$.varieties [4]. origin[1];;
C. ''$.varieties[4]. origin[1]''
D. product->varieties[3]. origin[0]''

正解：B

質問 # 23
Examine this bar graph based on columns from the players table:

Which two statements would generate this bar graph?

A. SELECT Name, Gender, Sport, REPEAT('# 'Y GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
B. SELECT Name, Gender, Sport, LENGTH (GPA*10, '# ') AS GPA_Graph FROM players ORDER BY GPA DESC;
C. SELECT Name, Gender, Sport, RPAD ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
D. SELECT Name, Gender, Sport, CHAR_LENGTH ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
E. SELECT Name, Gender, Sport, CONCAT ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

正解：B、C

質問 # 24
Which select statement returns true?

A. SELECT NULL <> NULL;
B. SELECT NULL <=> NULL;
C. SELECT NULL := NULL;
D. SELECT NULL = NULL;

正解：B

質問 # 25
Examine the Test.php script which is numbered for clarity, and its output:

PHP Fatal error: Uncaught Error: call to underined function mysqli_connect () in Test.php:2 Which action will fix this error?

A. Replace line 2 with Slink = mysql.connect {"localhost: 3306n, "username", "pas "schema") ;
B. Replace line 2 With: Slink = mysql_xdevapi\getSession
("mysqlx://username:password@localhost:3306","schema");
C. Enable the mysqli extension in the php.ini file.
D. Install the PHP executable in the path used by the MySQL installation.

正解：C

質問 # 26
Examine these statements which execute successfully:

Now, examine this query:

What is the result?