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Oracle 1Z0-921 問題集

1Z0-921

試験コード：1Z0-921

試験名称：MySQL 2021 Implementation Essentials

最近更新時間：2025-05-30

問題と解答：全78問

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質問 1：
You have been using mysqldump for logical backups of your MySQL databases. Your MySQL database size has been growing. Which two options can reduce the backup size and speed up the backup time?
A. Use mysqldump with - -incremental together with the - -compress option to back up incrementally based on previous full backup and compress the incremental backup files.
B. Use MySQL Enterprise Backup with the - -size=compress to compress the backup file.
C. Use MySQL Enterprise Backup with the - -compress option to compress the backup files and use - - compress-level to select the level of compression.
D. Use mysqldump with the - -changesonly option.
E. Use MySQL Enterprise Backup with the - - incremental policy to back up incrementally based on previous full backup.
正解：C,D

質問 2：
Which best describes database horizontal scale-out architecture deployment in MySQL in a read-heavy environment?
A. Allocating more CPU to the database instance to improve throughput performance.
B. Increasing the storage capacity so that the database can store more data to scale.
C. Deploy MySQL read-only slaves utilizing replication so that the slaves can be used for reads.
D. Adding more MySQL servers and sharing the same dacadir on a shared storage component like NFS.
E. Increasing the memory capacity so that there is a larger pooling buffer to increase the database read performance.
正解：B

質問 3：
Which statement is used to create a new MySQL database?
Response:
A. CREATE TABLE
B. CREATE SCHEMA
C. NEW DATABASE
D. CREATE DATABASE
正解：D

質問 4：
The MySQL Enterprise Monitor Agent requires a user configured in each MySQL instance that is being monitored with suitable privileges to collect information about the server.
Which statement is correct?
A. Monitoring metrics need super and root privileges because they are not available for a less-privileged user.
B. The super privilege is required when starting, stopping, or restarting monitored MySQL databases.
C. MySQL Enterprise Monitor creates the required users automatically.
D. The super privilege is required when creating and populating the inventory table, as well as running statements such as show master logs or SHOW ENGINE INNODB STATUS.
正解：D

質問 5：
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 6：
Which activity will take place if a table is created with both the compression and encryption options?
A. The compression is performed before tablespace data is encrypted.
B. The compression is performed, the ''data_at_rest_flag" is turned on and the tablespace data is encrypted.
C. The system generates an error because the COMPRESSION and ENCRYPTION options cannot be used together.
D. The tablespace data is encrypted first and then compression is performed.
正解：A

質問 7：
Which two deployment architectures could you use for scaling-out database reads?
A. Implementing a three-node, single-primary InnoDB Cluster.
B. Adding a memcached-tier for caching data and objects in RAM to reduce the number of times an external data source must be read.
C. Edit the configuration file and increase the value for parallel_read_workers and reboot the server
D. Altering the storage engine for all tables to memory to increase performance.
E. Changing the system setting with memory stickiness to true in order not to swap out mysq1dfrom memory.
正解：A,D

質問 8：
What are Security Lists in Oracle Cloud Infrastructure?
A. Security lists are data encryption levels that control who can see the data.
B. They are user-role designations that assign rights to certain internal users and external users.
C. They contain rules established by HIPAA for securing end-user data.
D. They are essentially firewall rules that help control traffic between OCI instances.
E. They allow administrators access to applications in the cloud and external servers.
正解：D

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

1. You get a maintenance-notification about your MySQL Enterprise Edition in Oracle Cloud Infrastructure (OCI) Compute instance. What is re the implication?

A) There are no maintenance operations planned. You need to do them manually.
B) You can expect an outage of your MySQL OCI instance during the planned time..
C) You need to agree to the maintenance windows. If not, you are not affected by the outage.
D) Depending on the planned outage, you may not be affected by it. You need to read the maintenance details in the support notice.


2. The slave connects to the master and asks for updated records. What command was issued for this to happen?

A) START SLAVE
B) SLAVE START
C) START RUN SLAVE
D) RUN SLAVE
E) SLAVE RUN


3. An Oracle Cloud Infrastructure customer already has many database instances configured and running in the cloud; however, they are reporting that they are unable to create any more instances.
What could be the problem?

A) The customer has not kept up with their patching requirements; new instances cannot be created unless the majority or the template of existing instances are up-to-date.
B) The customer account might have reached resource quota/limits.
C) The customer does not have proper user rights.
D) The customer reached the database instance limit of 32.


4. You establish MySQL Enterprise Server on Oracle Cloud Infrastructure connection via Secure Shell (SSH).
When accessing a new MySQL Enterprise Edition Oracle Cloud Infrastructure (OCI) instance, you want to use MySQL Enterprise Workbench for SQL and remote management.
What are two ways to successfully configure Workbench based on the MySQL access credentials?

A) Convert the private key to ppk format first. Based on TCP/IP over SSH and based on the created private key, opc-user, and MySQL access credentials, you can access the MySQL CS instance.
B) Open the MySQL OCI instance access port 3306. For the MySQL connection, you use this port, and, in addition, you configure the remote management based on SSH based on the provided key.
C) Configure the MySQL Router first and based on those settings, you access your MySQL CS instance.
D) Configure TCP/IP over SSH and based on the created private key, opc-User, and MySQL access credentials, you can access the MySQL OCI instance.


5. 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.


質問と回答：

質問 # 1
正解： B		質問 # 2
正解： B		質問 # 3
正解： D		質問 # 4
正解： B		質問 # 5
正解： B

1Z0-921 関連試験
1Z1-921 - MySQL 2021 Implementation Essentials
1Z0-922 - MySQL Implementation Associate
1Z1-922 - MySQL Implementation Associate
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