[2023年05月] 試験1Z0-909最新ブレーン専門問題集はここ [Q38-Q58]

[2023年05月] 試験1Z0-909最新ブレーン専門問題集はここ

無料で使える1Z0-909試験問題集試験点数を伸ばそう

Oracle 1Z0-909（MySQL 8.0データベース開発者）認定試験は、MySQL 8.0を使用してデータベースを開発および管理するスキルと知識を検証するために設計されています。この認定試験には、データベース設計、データ操作、データベースプログラミング、パフォーマンスチューニング、およびセキュリティなどのトピックが含まれます。この試験に合格することで、候補者はMySQL 8.0について深い理解を持ち、複雑なデータベースを開発および管理する能力を持っていることが証明されます。

オラクル1Z0-909試験は、MySQL 8.0データベースの開発に関する知識とスキルを示したい個人向けに設計されています。この試験は、オラクル認定プロフェッショナル、MySQL 8.0データベース開発者認定パスの一部です。この試験に合格する候補者は、MySQLデータベースの開発とメンテナンスに必要な知識とスキル、およびMySQLデータベースソリューションを設計・実装する能力を持っています。

 

質問 # 38
Examine the structure of the emp table:

Examine the structure of the emp_vu1 view based on the emp table:

Now, examine this statement:
mysq1> INSERT INTO emp_vul VALUES ('Alice',20000) ;
What is true about executing the statement?

• A. It inserts a row in the view only.
• B. It returns an error because an insert operation is not allowed on views.
• C. It returns an error because the PRIMARY ACCOUNT column is not selected for the view definition.
• D. It inserts a row in the emp table.

正解：D

質問 # 39
The collection col contains all episodes for all seasons for a TV show.
Examine this document which has an example of the details for each episode:

Which query returns all expisode names from the first season?

• A. SELECT doc->,$.name,, FROM col WHERE doc->"$ . season" = "1";
• B. SELECT name FROM col WHERE season = 1;
• C. SELECT "S.name" FROM col WHERE "S.season" = "1";
• D. SELECT doc->"$.name" FROM col WHERE doc->"$.season" = "1";

正解：C

質問 # 40
Examine this statement and output:

What causes the error?

• A. The set local_infile option has not been enabled.
• B. The database user does not have sufficient privilege.
• C. The database client process does not have sufficient privilege.
• D. The database server process does not have sufficient privilege.
• E. The database server is running in read-only mode.
• F. The engine is disabled.

正解：D

質問 # 41
The meeting table stores meeting schedules with participants from five continents. The participants' details are stored in another table.

You need to adjust the start_time and duration columns for optimal storage. What datatype changes would achieve this?

• A. start_time DATETIME duration DATETIME
• B. start_time TIME duration TIME
• C. start__time DATETIME duration TIME
• D. start_time TIMESTAMP duration TIMESTAMP
• E. start_time TIMESTAMP duration TIME

正解：A

質問 # 42
Examine these my.cnf settings:

Examine this entry from /data/slow.log

Which option is also set in my.cnf?

• A. log_queries_not_using_indexes
• B. log__slow_admin_statements=1
• C. log_queries_not_using_indexes=ON
• D. log_throttle_queries_not_using_indexes=100

正解：B

質問 # 43
Examine the appointments table definition which contains one million rows:

Now, examine this statement which executes successfully:

Which statement will improve query performance?

• A. ALTER TABLE appointments add index IX_4<attendant_id, payment, credit)
• B. ALTER TABLE appointments add index IX_3(attendant_id, created_by)
• C. ALTER TABLE appointments add index IX_2(attendant_session_id, created_by)
• D. ALTER TABLE appointments add index IX_1(credit,payment)

正解：A

質問 # 44
Examine this table definition:

The table must always remain a valid document store collection. What restriction does this impose on any added column?

• A. The column must be a generated column referencing any attribute of doc.
• B. The column must be a generated column referencing only an existing attribute of doc.
• C. The column must have a default value.
• D. The column must be used in a unique constraint.
• E. The column must be indexed.

正解：A

質問 # 45
Which two differences exist between the timestamp and date time data types?

• A. timestamp stores more decimal points in seconds
• B. timestamp uses less storage space.
• C. timestamp has larger range of values.
• D. timestamp stores the interval between two dates.
• E. timestamp converts the value based on the session time zone.

正解：B、E

質問 # 46
Examine this statement:

• A. user who creates the procedure needing the create and execute privileges
• B. Inserting COMMIT; SET @m :=: before line 4
• C. Inserting DEFINER 'username '@' localhost' clause into the CREATE PROCEDURE statement
• D. inserting USE <database >; before line 3
• E. user who creates the procedure needing the create routine privilege

正解：C

質問 # 47
You must reclaim memory used by a prepared statement named prep. Which two achieve this?

• A. PREPARE prep FROM '';
• B. DROP PREPARE prep;
• C. DEALLOCATE PREPARE prep?
• D. SET @prep = NULL;
• E. DROP PROCEDURE prep;
• F. SET @a = ''; EXECUTE prep USING @a;

正解：D、E

質問 # 48
What is an advantage of using mysqli in PHP programs rather than using PHP Data Objects (PDO)?

• A. mysqli includes X DevAPI functions.
• B. mysqli can access databases from other vendors.
• C. mysqli supports object oriented programming.
• D. mysqli supports non blocking, asynchronous queries.

正解：C

質問 # 49
Which change will prevent negative ages to be inserted into the people table?

• A. DELIMITER //
  CREATE TRIGGER age check AFTER INSERT ON people FOR EACH ROW IF NEW. age < 0 THEN SET NEW.age =0; END IF;// DELIMITER;
• B. ALTER TABLE people ADD COLUMN valid_age=ABS(check_age) GENERATED ALWAYS;
• C. DELIMITER //
  CREATE TRIGGER agecheck BEFORE INSERT ON people FOR EACH ROW IF NEW. age < 0 THEN SET NEW.age =0; END IF;// DELIMITER ;
• D. ALTER TABLE people ADD CONSTRAINT check_age CHECK (ABS(age)>=0);

正解：D

質問 # 50
Which two statements are true about AUTO_INCREMENT?

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

正解：C、D

質問 # 51
Examine these statement which execute successfully:

Now, examine the statements executed in the mysqi command-line client:

What is true?

• A.
• B.
• C.
• D.

正解：D

質問 # 52
Your program which uses a MySQL connector receives this error:
Client does not support authentication protocol request by server
The account running the program uses caching_sha2_password.
Which two resolve this conflict?

• A. Change the user account to use mysql_native_password.
• B. Use blank RSA or SSL certificates.
• C. Disable TLS/SSL authentication.
• D. Place this in the root directory of your shell account:
  [mysqld] require__secure_transport=OFF
• E. Upgrade the connector to a version that supports caching_sha2_password.

正解：A、E

質問 # 53
You are using buffered queries with PHP mysqli in a browser-based web application. Which three are true?

• A. Large results can have a negative impact on performance.
• B. Buffered queries must be explicitly enabled using mysqliuseresult.
• C. Buffered queries should be used on large tables when the result size is unknown.
• D. Results are sent from the server to the browser for buffering.
• E. Buffered queries are enabled by default.
• F. Additional queries on the same session are blocked until the result set is released.
• G. Results are sent to the calling PHP process for buffering.

正解：A、B、C

質問 # 54
Examine these statements which execute successfully:

Now, examine this query:

What is the result?

• A. It inserts a row with no error or warning.
• B. It fails with an error.
• C. It inserts a row with an error.
• D. It inserts a row with a warning.
• E. It fails with a warning.

正解：A

質問 # 55
Examine these statements which execute successfully:

The statements executed without exception. Which two are true?

• A. No transaction commits.
• B. The transaction is rolled back to the savepoint.
• C. Two transactions commit.
• D. No row is inserted into band.
• E. One row is inserted into band.

正解：A、E

質問 # 56
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 returned because the transaction is auto committed in S2.
• C. The inserted row is not returned because the isolation level is READ COMMITTED in S2.
• D. The inserted row is not returned because the transaction still active in s2.

正解：D

質問 # 57
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 .varieties. VarietyName ' ) VIRTUAL, ADD KEY idx_name (name.) ;
• B. ALTER TABLE fshop ADD COLUMN name VARCHAR(20) AS (product->' S - name' ) VIRTUAL, ADD KEY idx_name (name) ;
• C. ALTER TABLE fshop ADD COLUMN name VARCHAR(100) AS (product->' S - varieties' ) VIRTUAL, ADD KEY idx_name (name) ;
• D. ALTER TABLE fshop ADD name VARCHAR(20) AS (JSON_ONQUOTE (product->"S.varieties.VarietyName")), ADD INDEX (name);
• E. ALTER TABLE fshop ADD COLUMN name VARCHAR(20), ADD KEY idx_name (name) ;

正解：C

質問 # 58
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Oracle 1Z0-909試験の準備をするためには、MySQLの概念に強い理解を持ち、SQLプログラミング言語に精通している必要があります。また、オラクルが提供する様々なトレーニングコース、練習試験、学習資料を利用して、自身の知識とスキルを向上させることができます。

 

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