1Z0-921の無料問題集（78題）、1Z0-921認定試験参考書

Oracle 1Z0-921 問題集

試験コード：1Z0-921

試験名称：MySQL 2021 Implementation Essentials

最近更新時間：2025-03-31

問題と解答：全78問

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質問 1：
Which three installation options are available for installing the MySQL Enterprise Monitor/Agent on Linux?
A. A MySQL Enterprise Monitor to remotely deploy the MySQL Monitor Agent
B. A script (with an option file) for installing MySQL Enterprise Monitor, Agent, and a MySQL Repository database
C. A CLI-based wizard MySQL Enterprise Monitor, Agent, and a MySQL Repository database
D. A GUI for installing MySQL Enterprise Monitor, Agent, and a MySQL Repository database
E. A browser-based wizard to remotely deploy the MySQL Monitor Agent
正解：B,C,D

質問 2：
Which component of MySQL Enterprise Monitor provides trend analysis and capacity planning for MySQL databases?
Response:
A. Query Analyzer
B. MySQL Advisors
C. MySQL Dashboard
D. MySQL Query Analyzer
正解：D

質問 3：
Which two are advantages of using Document Store in MySQL?
A. MySQL can store XML as a schema-less database
B. MySQL provides a native data type to store JSON data as a document
C. MySQL provides a native data type to index PDF documents
D. MySQL provides a NoSQL API to access the document store
E. MySQL is a document database allowing PDF and Word documents
正解：A,D

質問 4：
Consider this SQL statement which is using the innoDB storage engine and with global AUTOCOMMIT = 1:

What is the result after issuing the rollback command?
A. Only the t2 table is created.
B. Only the t1 table is created.
C. Both the tables, t1 and t2, are not created because there is an explicit ROLLBACK.
D. Both the tables, t1 and t2, are created.
正解：D

質問 5：
Which three are requirements for MySQL Group Replication (GR)?
A. Data to be replicated must be stored in the InnoDB transactional storage engine.
B. The minimum number of required nodes for achieving a consensus is two.
C. Primary keys are required on every replicated table.
D. The use of global transaction identifiers is required.
E. GR only works with MySQL versions 8.0.12 or higher.
F. The binary log format must be set to mixed.
正解：A,C,F

質問 6：
You have three machines with MySQL Databases running on Linux platform.
Which backup procedures would allow online and remote backup of the MySQL Database on the three machines to a connected Storage NFS?
A. 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on the machine that is used to start the backup.3. Start mysqlbackup on only one machine with the installation to back up the databases for the three machines to the mounted volume using - - backup-dir and by specifying -- config-files=my1.cnf, my2.cnf, my3.cnf.my1.cnf, my2cnf, and my3.cnf are the MySQL Database Configuration files on the three machines.4. Validate the backup by using the mysqlbackup program to ensure that the backup created is valid.
B. 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on all three machines.3. Start mysqlbackup on all machines to back up the database to the mounted volume using - -backup-dir.4. Validate the backup using the mysqlbackup program to ensure that the backup created is valid.
C. 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on machine which is used to start the backup.3. Start mysqlbackup on only one machine with the installation to back up the databases for the three machines to the mounted volume using - -backup-dir and by giving--hosts=machine1:port1, machine2:port2, machine3:port3.4. Validate the backups using the mysqlbackup program to ensure that the backups created are valid.
D. 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Workbench on a separate machine, which is used to connect to the three machines to back up and restore.3. Startup MySQL backup from MySQL Workbench to back up the three databases.4. Validate the backup by using MySQL Workbench to ensure that the backup created is valid.
正解：B

質問 7：
You want to create an encrypted table. So, you enter this command:
CREATE TABLE 'test_encryption2% (
'id' int(10) unsigned NOT NULL AUTO_INCREMENT,
'server_name' varchar(15) NOT NULL,
PRIMARY KEY ('id') ) ENGINE=MYISAM AUTO_INCREMENT=l DEFAULT CHARSET=latin1 ENCRYPTION = 'Y1; You receive the following error:
ERROR 1031 (HY000): Table storage engine for 'test_encryption2' doesn't have this option Which statement correctly explains the reason for this error?
A. The term "server_name" is a reserved MySQL term. You cannot use it for the new table. This is what is causing the error.
B. The test_encryption2 already exist. You are not using the correct option to recreate it and it is causing the error.
C. The encryption feature only works with InnoDB tables. You are creating a MylSAM table, and it is causing the error.
D. You cannot use the AUTO_INCREMENT option to create an encrypted table. This is what is causing the error.
正解：C

質問 8：
How does MySQL HeatWave improve query performance?
Response:
A. By automatically creating indexes on frequently used columns.
B. By replicating data across multiple servers.
C. By offloading analytics queries to an in-memory, highly parallel processing engine.
D. By caching the entire database in memory.
正解：C

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Oracle MySQL 2021 Implementation Essentials 認定 1Z0-921 試験問題:

1. Which is a correct example of creating an Enterprise Encryption function?

A) SET @function = CREATE_ASYMMETRIC_PRIV_KEY(@algo, @key_len);
B) VALIDATE FUNCTION create_asymmetric_priv_key WITH ,openssl_udf.so';
C) INSERT INTO t1 (key_co1) FUNCTION(CREATE_ASYMMETRIC_PRIV_KEY(,RSA,, 1024));
D) CREATE FUNCTION asymmetric_decrypt RETURNS STRING SONAME ,openss1_udf.so,;

2. Consider this SQL statement which is using the innoDB storage engine and with global AUTOCOMMIT = 1:

What is the result after issuing the rollback command?

A) Only the t2 table is created.
B) Only the t1 table is created.
C) Both the tables, t1 and t2, are not created because there is an explicit ROLLBACK.
D) Both the tables, t1 and t2, are created.

3. Which query will find rows in a table that have no counterpart in another table?

A) SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;
B) SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;
C) SELECT t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;
D) SELECT left_tbl.*FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id=right_tbl.idWHERE right_tbl.id IS NULL;

4. When should you perform a backup in a MySQL database?
Response:

A) After critical data updates or before making significant changes to the database.
B) After every successful query execution.
C) Only when the database size exceeds a certain limit.
D) Only during scheduled maintenance windows.

5. When using an Oracle Cloud Infrastructure Compute Instance with MySQL Enterprise Edition installed, you have two choices for backup destinations. What are these two choices?

A) Cloud storage only
B) Flash-archive recovery area
C) Cloud tape library
D) Both Cloud storage and local storage

質問と回答：

質問 # 1
正解： D

質問 # 2
正解： D

質問 # 3
正解： D

質問 # 4
正解： A

質問 # 5
正解： A、D