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NEW QUESTION # 19
You want to create a second user called admin2 with the same privileges as the administrator specified when creating the DB system.
Which statement helps you achieve this?
- A. CREATE USER admin2 IDENTIFIED BY 'Password'; GRANT SUPER ON *.* TO admin2 WITH GRANT OPTION;
- B. CREATE USER admin2 IDENTIFIED BY 'Password' DEFAULT ROLE 'administrator';
- C. CREATE USER admin2 IDENTIFIED BY 'Password'; GRANT AUDIT_ADMIN,
BACKUP_ADMIN, SESSION_VARIABLES_ADMIN ON *.* TO admin2 WITH GRANT OPTION; - D. CREATE USER admin2 IDENTIFIED BY 'Password'; GRANT ALL PRIVILEGES ON *.* TO admin2 WITH GRANT OPTION;
Answer: D
Explanation:
To create a second user calledadmin2with the same privileges as the administrator, you can use the following statement:
D:CREATE USER admin2 IDENTIFIED BY 'Password'; GRANT ALL PRIVILEGES ON *.* TO admin2 WITH GRANT OPTION; This creates the useradmin2and grants all privileges, along with the ability to grant those privileges to other users.
NEW QUESTION # 20
You want to change the configuration of an active stand-alone DB system. The DB system is configured as the target of a channel, and the channel is currently active.
Which sequence of steps must you perform?
- A. Edit the DB system and change the configuration.
- B. Stop the channel, edit the DB system, change the configuration, and start the channel.
- C. Stop the DB system, edit the DB system, change the configuration, and start the DB system.
- D. Delete the channel, edit the DB system, change the configuration, and re-create the channel.
Answer: B
Explanation:
To change the configuration of an active stand-alone DB system that is configured as the target of a channel, and the channel is currently active, you must:
D:Stop the channel, edit the DB system, change the configuration, and start the channel: This sequence ensures that no data inconsistency or replication issues occur while the configuration changes are being applied.
NEW QUESTION # 21
You want to restore the backup of a stand-alone DB system to a new DB system.
Which two changes are allowed? (Choose two.)
- A. Use a smaller data storage size for the new DB system.
- B. Use a different tenancy for the new DB system.
- C. Use a different shape for the new DB system.
- D. Use a different subnet for the new DB system.
- E. Use a different region for the new DB system.
Answer: C,D
Explanation:
When restoring the backup of a stand-alone DB system to a new DB system, the following changes are allowed:
* Use a different subnet for the new DB system(Answer B): You can select a different subnet within the same VCN or a different VCN for the new DB system, providing flexibility in network configuration.
* Use a different shape for the new DB system(Answer C): You can choose a different compute shape for the new DB system, allowing you to scale the compute resources according to the requirements.
References:
* OCI MySQL Database Service Backup and Restore Documentation
NEW QUESTION # 22
You run this command to connect successfully to a DB system:
mysqlsh [email protected] --auth-method=authentication_oci_client
Why does the command NOT require a password?
- A. The operating system user credential is used to authenticate with the DB system.
- B. The credential is stored in an OCI vault secret.
- C. The correct password is saved in the local MySQL Shell secret store.
- D. The correct API key-pair is specified in the -/. oci. config file.
Answer: D
Explanation:
The commandmysqlsh [email protected] --auth-method=authentication_oci_clientdoes not require a password because it uses the OCI (Oracle Cloud Infrastructure) client authentication method. This method relies on the correct API key-pair specified in the~/.oci/configfile. This file contains the necessary credentials (user OCID, tenancy OCID, API keys, etc.) to authenticate with the OCI environment without needing a password for each connection.
NEW QUESTION # 23
You want to train a model that predicts sales based on the available data the company holds.
This is an excerpt of thesalestable:
Which command trains the model?
- A. CALL sys.ML_TRAIN('ml_data.sales', 'Sales', JSON_OBJECT('task', 'anomaly_detection'),
@model); - B. CALL sys.ML_TRAIN('ml_data.sales', 'Sales', JSON_OBJECT('task', 'regression'), @model);
- C. CALL sys.ML_TRAIN('ml_data.sales', 'Sales', JSON_OBJECT('task', 'classification'), @model);
- D. CALL sys.mML_TRAIN('ml_data.sales', 'Sales', JSON_OBJECT('task', 'forecasting'), @model);
Answer: B
Explanation:
To train a model that predicts sales, the appropriate machine learning task would be regression, as it involves predicting a continuous value (sales) based on the given data. The command to train such a model is:
D:CALL sys.ML_TRAIN('ml_data.sales', 'Sales', JSON_OBJECT('task', 'regression'), @model); This command calls theML_TRAINprocedure on theml_data.salestable, withSalesas the target variable, specifying the task as regression.
NEW QUESTION # 24
What happens when you perform a switchover of a high-availability DB system with an attached HeatWave cluster?
- A. The HeatWave cluster remains attached to the same DB system and the new primary instance redirects queries to that cluster.
- B. The HeatWave cluster is deleted and a new HeatWave cluster is attached to the new primary instance.
- C. The HeatWave cluster is no longer valid; you must re-create the HeatWave cluster.
- D. The HeatWave cluster is attached to the new primary instance.
Answer: D
Explanation:
When you perform a switchover of a high-availability DB system with an attached HeatWave cluster, theHeatWave cluster is attached to the new primary instance(Answer B). This ensures continuous operation and access to the HeatWave cluster's capabilities without the need to delete or re-create the cluster.
* During a switchover, the system promotes the standby instance to the primary role.
* The HeatWave cluster, which was previously attached to the original primary instance, is now re-attached to the new primary instance.
* This allows the new primary instance to continue processing queries using the HeatWave cluster seamlessly.
References:
* MySQL HeatWave High Availability Documentation
NEW QUESTION # 25
What is the benefit of creating a new DB system with data import?
- A. Faster import with minimal logging
- B. Smaller storage size with better compression
- C. Consistent data with no user connection
- D. Faster backup with a first full backup
Answer: A
Explanation:
Creating a new DB system with data import provides the benefit of faster import with minimal logging. This process is optimized to import large datasets efficiently and quickly, reducing the amount of logging overhead and ensuring a rapid setup of the new DB system.
NEW QUESTION # 26
A DB system has been deleted successfully. Which two operations are allowed on the deleted DB system?
(Choose two.)
- A. Change the storage size.
- B. Restore the DB system from an existing manual backup.
- C. View the metrics.
- D. View the API call logs on the Audit page.
- E. Create a manual backup.
Answer: B,D
Explanation:
When a DB system has been successfully deleted, the following operations are allowed:
* Restore the DB system from an existing manual backup(Answer C): Even after the DB system is deleted, you can restore it from any existing manual backups. This allows you to recover the data and configuration from a point-in-time backup.
* View the API call logs on the Audit page(Answer E): You can view the API call logs related to the deleted DB system on the Audit page. These logs provide a record of actions taken on the DB system, including the deletion event.
References:
* OCI Backup and Restore Documentation
* OCI Audit Documentation
NEW QUESTION # 27
What must you do to minimize a DB system down time caused by automatic maintenance operations?
- A. Create read replicas.
- B. Enable high availability.
- C. Add HeatWave cluster.
- D. Enable crash recovery.
Answer: B
Explanation:
To minimize DB system downtime caused by automatic maintenance operations, you should enable high availability. High availability ensures that there are multiple instances of your database running in different fault domains or availability domains, reducing the impact of maintenance on the system's availability.
NEW QUESTION # 28
You want to train a classification model with MySQL HeatWave AutoML. Which two are requirements of the training data set? (Choose two.)
- A. The target column must have at least two distinct values.
- B. All feature columns must be numeric.
- C. The target column must be numeric.
- D. There must be at least two feature columns.
- E. The target column and all feature columns must be stored in a single table.
Answer: A,E
Explanation:
When training a classification model with MySQL HeatWave AutoML, the following requirements must be met:
* The target column and all feature columns must be stored in a single table(Answer B): All data necessary for training the model should be in one table to simplify the data processing and training pipeline.
* The target column must have at least two distinct values(Answer E): For classification tasks, the target column must have multiple distinct values to enable the model to differentiate between classes.
References:
* MySQL HeatWave AutoML Documentation
* MySQL HeatWave User Guide
NEW QUESTION # 29
Which two are true about read replica load balancer? (Choose two.)
- A. It has the same endpoint as the DB system.
- B. It distributes connections among read replicas.
- C. It distributes connections among the source DB system and all read replicas.
- D. It is created when the DB system is first created.
- E. User accounts containing a client host name cannot connect to the read replica load balancer.
Answer: B,C
Explanation:
The following are true about the read replica load balancer:
* It distributes connections among the source DB system and all read replicas(Answer B): The load balancer distributes incoming read traffic across all read replicas and the source DB system to balance the load and improve performance.
* It distributes connections among read replicas(Answer E): The load balancer ensures that read traffic is evenly distributed among all available read replicas, providing high availability and scalability for read operations.
References:
* OCI MySQL Database Service Read Replicas Documentation
NEW QUESTION # 30
A MySQL DB system has an endpoint in an OCI VCN subnet. The VCN is not configured with VCN peering, VPN access, and FastConnect. You want to connect to the MySQL DB system directly from an OCI Cloud Shell session.
Which two are true? (Choose two.)
- A. You must install mysql client programs in the Cloud Shell session.
- B. The VCN subnet of the Cloud Shell session must have an Internet Gateway in its route table.
- C. The MySQL DB system subnet must be in the Cloud Shell tenancy home region.
- D. You must attach the Cloud Shell session to a VCN subnet that can connect to the MySQL DB system.
- E. The VCN subnet of the Cloud Shell session must have a Service Gateway in its route table.
Answer: C,D
Explanation:
To connect to a MySQL DB system from an OCI Cloud Shell session when the VCN is not configured with VCN peering, VPN access, or FastConnect, the following must be true:
A:You must attach the Cloud Shell session to a VCN subnet that can connect to the MySQL DB system: The Cloud Shell must be in the same network or have a route to the network containing the MySQL DB system.
C:The MySQL DB system subnet must be in theCloud Shell tenancy home region: Cloud Shell sessions operate within the OCI home region, so the target MySQL DB system must be accessible from within the same region.
NEW QUESTION # 31
You want to connect to a DB system with MySQL Shell.
DB system endpoint IP address: 10.0.1.221
Username: admin
Password: MySQL8.0
Which two commands work? (Choose two.)
- A. mysqlsh -h10.0.1.221 -uadmin -pMySQL8.0
- B. mysqlsh mysql://admin:[email protected]
- C. mysqlsh -h 10.0.1.221 -u admin -p MySQL8.0
- D. mysqlsh -host 10.0.1.221 -user admin -password MySQL8.0
- E. mysqlsh mysql://MySQL8.0:[email protected]
Answer: A,B
Explanation:
To connect to a MySQL DB system using MySQL Shell, you can use several command-line formats. Here, we will analyze the provided options:
A:mysqlsh -h 10.0.1.221 -u admin -p MySQL8.0
* Incorrect format. The password should not be directly placed after the-pflag without a space or equals sign.
B:mysqlsh mysql://MySQL8.0:[email protected]
* Incorrect format. The username should come before the password in the URL.
C:mysqlsh mysql://admin:[email protected]
* Correct format. This is a valid way to connect using a URL-like format whereadminis the username,MySQL8.0is the password, and10.0.1.221is the host.
D:mysqlsh -h10.0.1.221 -uadmin -pMySQL8.0
* Correct format. This is a valid way to connect using flags, with no spaces between the flags and their values.
E:mysqlsh -host 10.0.1.221 -user admin -password MySQL8.0
* Incorrect format. MySQL Shell uses-h,-u, and-pfor specifying host, username, and password respectively.
NEW QUESTION # 32
You have successfully enabled high availability of a stand-alone DB system. Which is true?
- A. The DB system provides new port numbers on the same endpoint to connect to the secondary instances for read-only connections.
- B. The DB system has three instances running in different availability or fault domains.
- C. The DB system performs load balancing by distributing client connections to all instances.
- D. The DB system provides new endpoints to connect to the secondary instances for read-only connections.
Answer: B
Explanation:
When high availability is enabled for a stand-alone DB system,the DB system has three instances running in different availability or fault domains(Answer D).
* High Availability Configuration: This setup involves creating multiple instances of the DB system across different availability or fault domains to ensure redundancy and minimize the risk of downtime due to hardware or network failures.
* Instances: Typically, there are three instances-one primary and two replicas-ensuring that the system can failover seamlessly if one instance goes down.
References:
* OCI MySQL High Availability
NEW QUESTION # 33
Why would you select "Source cannot use GTID auto-positioning" when creating a channel?
- A. Some tables have no primary key
- B. The binary log offset is unknown.
- C. The source gtid mode is OFF.
- D. The target DB system is a high-availability DB system.
Answer: C
Explanation:
When creating a replication channel and selecting "Source cannot use GTID auto-positioning", it typically indicates that the source's GTID mode is off. GTID (Global Transaction Identifier) auto-positioning allows for automated recovery and positioning of transactions in replication, but it requires that GTID mode be enabled on the source database.
NEW QUESTION # 34
Which two methods can you use to import data into a MySQL DB system by using MySQL Shell? (Choose two.)
- A. util.dumpInstance()
- B. util.importTable()
- C. util.loadDump()
- D. util.dumpSchemas()
Answer: B,C
Explanation:
Two methods to import data into a MySQL DB system using MySQL Shell are:
A:util.importTable(): This utility imports data from a file into a table. D.util.loadDump(): This utility loads a previously dumped database or table into a MySQL DB system.
NEW QUESTION # 35
What must be enabled for using the point-in-time recovery feature in a DB system?
- A. High availability
- B. HeatWave cluster
- C. Delete protection
- D. Automatic backups
Answer: D
Explanation:
To use the point-in-time recovery feature in a DB system,automatic backupsmust be enabled (Answer B).
* Point-in-Time Recovery: This feature allows you to restore your database to a specific point in time, which is crucial for recovering from accidental data loss or corruption.
* Automatic Backups: These provide the necessary backup data that can be used to restore the database to the desired point in time.
References:
* OCI MySQL Database Service Point-in-Time Recovery
* Automatic Backups Documentation
NEW QUESTION # 36
Which is true about dynamic variables in MySQL HeatWave configurations?
- A. All user variables are dynamic.
- B. Dynamic variables in a custom configuration can be changed without copying the configuration to a new configuration.
- C. Changes in dynamic variables require a server restart.
- D. Initialization variables are not dynamic.
Answer: B
Explanation:
In MySQL HeatWave configurations, dynamic variables can be changed without requiring the configuration to be copied to a new configuration. This allows for more flexible and immediate adjustments to system settings without the need for a server restart or creating a new configuration instance.
NEW QUESTION # 37
You want to create a read replica on a DB system.
Which is true about the read replica?
- A. lt must have at least 64 GB of memory.
- B. It must have at least 1 TB of storage
- C. It must have at least 4 OCPUs.
- D. It must be a bare metal shape
Answer: A
Explanation:
For a read replica on a DB system,it must have at least 64 GB of memory(Answer D). This requirement ensures that the read replica has sufficient resources to handle read operations and maintain performance consistency with the primary DB system.
References:
* OCI MySQL Read Replicas Documentation
NEW QUESTION # 38
Which two are true about MySQL HeatWave configuration resources? (Choose two.)
- A. You must copy the configuration before changing any variable values.
- B. You can compare configurations in the same compartment in OCI console.
- C. You can view custom configuration sets with the OCI CLI oci mysql db-system get command.
- D. You can set a value for any global MySQL variable in a configuration.
Answer: C,D
Explanation:
A:You can set a value for any global MySQL variable in a configuration: MySQL HeatWave allows you to configure and set global MySQL variables to optimize performance and customize the environment as needed.
C:You can view custom configuration sets with the OCI CLIoci mysql db-system getcommand: The OCI CLI provides commands to retrieve details about MySQL DB systems, including custom configurations.
NEW QUESTION # 39
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