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NEW QUESTION # 36
Which two are available when creating a new MySQL DB system in OCI Console? (Choose two.)
- A. Lakehouse
- B. HeatWave cluster
- C. High availability
- D. Standalone server
- E. Read replica
Answer: C,D
Explanation:
When creating a new MySQL DB system in the OCI Console, you have the following options:
* High availability(Answer A): This option allows you to create a DB system that can automatically fail over to a standby instance in case of hardware or software failure, ensuring minimal downtime.
* Standalone server(Answer C): This option lets you create a DB system with a single instance, suitable for workloads that do not require high availability or read replicas.
References:
* OCI MySQL Database Service Documentation
* MySQL High Availability
NEW QUESTION # 37
Automatic backup retention of a DB system is disabled. Which operation deletes all automatic backups of the DB system?
- A. Disabling point-in-time recovery
- B. Deleting the DB system
- C. Enabling point-in-time recovery
- D. Disabling delete protection
Answer: B
Explanation:
When automatic backup retention of a DB system is disabled,deleting the DB system(Answer C) will delete all automatic backups of the DB system.
* Automatic Backups: These are backups created automatically by the OCI service to ensure data protection.
* Backup Deletion: If automatic backups are disabled and you delete the DB system, all associated automatic backups are also deleted. This operation is irreversible, and you should ensure that necessary backups are taken before deleting the DB system.
References:
* OCI MySQL Database Service Backup and Restore
NEW QUESTION # 38
What must be enabled for using the point-in-time recovery feature in a DB system?
- A. Automatic backups
- B. HeatWave cluster
- C. High availability
- D. Delete protection
Answer: A
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 # 39
You want to deploy a high-availability MySQL DB system in a region with multiple availability domains.
Which two types of subnet provide maximum redundancy? (Choose two.)
- A. A private AD-specific subnet
- B. A public regional subnet
- C. A public AD-specific subnet
- D. A private regional subnet
Answer: B,D
Explanation:
To deploy a high-availability MySQL DB system in a region with multiple availability domains, the following types of subnets provide maximum redundancy:
* A private regional subnet(Answer B): This type of subnet spans all availability domains in the region, ensuring high availability and fault tolerance.
* A public regional subnet(Answer C): Similar to the private regional subnet, a public regional subnet spans all availability domains, providing maximum redundancy and accessibility.
References:
* OCI Networking Documentation
* MySQL High Availability Documentation
NEW QUESTION # 40
Which two methods can be used to stop a DB system? (Choose two.)
- A. Run the SHUTDOWN SQL statement from any connected client logged in as the admin user.
- B. Use the STOP action on the DB system details page in the OCI Console.
- C. Run the shutdown command from a mysqladmin client logged in as the admin user.
- D. Execute the mysql db-system stop command from OCI CLI.
Answer: B,D
Explanation:
You can stop a MySQL DB system using the following methods:
A:Use the STOP action on the DB system details page in the OCI Console: This is a straightforward way to stop the DB system via the Oracle Cloud Infrastructure web interface. D.Execute themysql db-system stop command from OCI CLI: This command uses the Oracle Cloud Infrastructure Command Line Interface to stop the DB system programmatically.
NEW QUESTION # 41
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 # 42
A query is not offloaded to the HeatWave cluster for execution. Which three are possible reasons? (Choose three.)
- A. The client is connected to the DB system instead of the HeatWave cluster.
- B. The use_secondary_engine session variable is OFF.
- C. The query estimated cost is less than the query cost threshold.
- D. A required column is excluded from the RAPID secondary engine.
- E. The user does not have privileges to access the HeatWave cluster.
Answer: A,B,D
Explanation:
A query may not be offloaded to the HeatWave cluster for execution due to the following reasons:
A:Theuse_secondary_enginesession variable is OFF: This setting controls whether queries should be offloaded to the secondary engine (HeatWave). B.The client is connected to the DB system instead of the HeatWave cluster: For queries to be offloaded, the client must be connected to the HeatWave cluster. E.A required column is excluded from the RAPID secondary engine: If a necessary column is not available in the HeatWave (RAPID) secondary engine, the query cannot be offloaded.
NEW QUESTION # 43
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 set a value for any global MySQL variable in a configuration.
- C. You can compare configurations in the same compartment in OCI console.
- D. You can view custom configuration sets with the OCI CLI oci mysql db-system get command.
Answer: B,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 # 44
Which two are true about creating a Bastion service to connect to a MySQL DB system? (Choose two.)
- A. The Bastion service must have a public IP address.
- B. The Bastion service must be in the same VCN as the DB system.
- C. TheBastion subnet must have an ingress rule to allow stateful connections on the MvSQL DB system port number.
- D. The Bastion CIDR block allowlist must include the IP address of all valid client machines.
- E. The Bastion CIDR block allowlist must include the IP address of the DB system.
Answer: C,D
Explanation:
When creating a Bastion service to connect to a MySQL DB system, the following are true:
* The Bastion CIDR block allowlist must include the IP address of all valid client machines(Answer C):
This ensures that only the IP addresses specified in the allowlist can access the Bastion service, enhancing security by restricting access to known clients.
* The Bastion subnet must have an ingress rule to allow stateful connections on the MySQL DB system port number(Answer E): This allows the Bastion service to communicate with the MySQL DB system by permitting traffic through the necessary ports.
References:
* OCI Bastion Service Documentation
* Setting Up Bastion with MySQL DB System
NEW QUESTION # 45
Which two are true about data loaded into a MySQL HeatWave cluster? (Choose two.)
- A. Data rows are sorted on the primary key to speed up range search.
- B. Data is stored locally in each cluster node's solid state disks (SSD) to increase I/O performance.
- C. Data is replicated across cluster nodes for high availability.
- D. Data is partitioned across cluster nodes for scalability.
- E. Data is stored in hybrid columnar format to speed up analytic queries.
Answer: D,E
Explanation:
Data loaded into a MySQL HeatWave cluster:
B:Data is partitioned across cluster nodes for scalability: This allows the system to distribute the workload and handle large datasets efficiently. D.Data is stored in hybrid columnarformat to speed up analytic queries: The hybrid columnar format optimizes storage and speeds up query performance, especially for analytic workloads.
NEW QUESTION # 46
You can perform a node estimate when adding a HeatWave cluster to a DB system in OCI Console. Which two tasks are performed by the node estimate process? (Choose two.)
- A. Estimate the memory required for each user table.
- B. Estimate the disk storage required for each user table.
- C. Generate a load command to activate Auto Parallel Load.
- D. Generate a set of alter statements to load selected tables into the HeatWave cluster.
- E. Estimate the number of OCPUs required to process selected user tables.
Answer: A,E
Explanation:
When performing a node estimate while adding a HeatWave cluster to a DB system in OCI Console, the process undertakes the following tasks:
* Estimate the number of OCPUs required to process selected user tables(Answer B): The node estimation process calculates the necessary OCPUs based on the size and complexity of the tables selected by the user. This ensures that the cluster has adequate processing power for efficient performance.
* Estimate the memory required for each user table(Answer C): This task involves determining the memory requirements for each table that will be loaded into the HeatWave cluster. This ensures that there is sufficient memory to handle the data and execute queries efficiently.
References:
* OCI Console Documentation on HeatWave
* MySQL HeatWave User Guide
NEW QUESTION # 47
Which three operations can be performed on a MySQL HeatWave backup? (Choose three.)
- A. Move an active backup to another compartment.
- B. Restore an active backup to a new DB system in another region.
- C. Change the retention period of an active automatic backup.
- D. Change the retention period of an active manual backup.
- E. Delete an active manual backup when point-in-time recovery is enabled on the DB system.
Answer: A,B,D
Explanation:
Three operations that can be performed on a MySQL HeatWave backup are:
B:Change the retention period of an active manual backup: You can adjust how long the backup is retained.
C:Restore an active backup to a new DB system in another region: You can restore backups to different regions for disaster recovery or data migration. E.Move an active backup to another compartment: You can organize and manage backups by moving them to different compartments.
NEW QUESTION # 48
Which feature do you use to copy transactions from an on-premises MySQL instance to a DB system?
- A. Outbound replication
- B. HeatWave cluster
- C. Read replica
- D. Inbound replication
Answer: D
Explanation:
To copy transactions from an on-premises MySQL instance to a DB system, you useinbound replication(Answer B).
* Inbound Replication: This feature allows the MySQL DB system to receive and apply changes (transactions) from an external MySQL instance.
* Replication Configuration: You need to set up replication between the on-premises MySQL instance and the MySQL DB system by configuring the master (on-premises) and the slave (DB system) appropriately.
References:
* MySQL Replication Documentation
* OCI MySQL Database Service Documentation
NEW QUESTION # 49
You want to replicate data from an on-premises MySQL server to a MySQL DB system. The on-premises MySQL server runs in your corporate network. The MySQL server accepts incoming connections from the Internet on a public IP endpoint.
The DB system runs in Oracle Cloud Infrastructure. The DB system endpoint is connected to a privatesubnet of a VCN.
Which network configuration is required?
- A. Configure an OCI network load balancer to accept incoming connections on a public IP and route to the DB system private IP address.
- B. Create a NAT gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the NAT gateway.
- C. Create an Internet gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the Internet gateway.
- D. Create a service gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the service gateway.
Answer: B
Explanation:
To replicate data from an on-premises MySQL server to a MySQL DB system running in Oracle Cloud Infrastructure (OCI), where the DB system is connected to a private subnet of a Virtual Cloud Network (VCN), you need to enable the DB system to communicate with the Internet securely. The correct configuration is tocreate a NAT gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the NAT gateway(Answer D).
* NAT Gateway: A Network Address Translation (NAT) gateway enables instances in a private subnet to initiate outbound traffic to the Internet, but it prevents the Internet from initiating connections to those instances.
* Route Table Configuration: You need to update the route table for the private subnet to direct traffic destined for the Internet to the NAT gateway.
Steps:
* Create a NAT gateway in the OCI Console.
* Update the route table associated with the private subnet to include a route rule that directs all Internet-bound traffic (0.0.0.0/0) to the NAT gateway.
References:
* OCI NAT Gateway Documentation
* Configuring Routing for Private Subnets
NEW QUESTION # 50
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. The VCN subnet of the Cloud Shell session must have an Internet Gateway in its route table.
- B. You must attach the Cloud Shell session to a VCN subnet that can connect to the MySQL DB system.
- C. You must install mysql client programs in the Cloud Shell session.
- D. The VCN subnet of the Cloud Shell session must have a Service Gateway in its route table.
- E. The MySQL DB system subnet must be in the Cloud Shell tenancy home region.
Answer: B,E
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 # 51
You want to restore a stand-alone DB system to a high-availability DB system with a point-in-time recovery.
Which three are required? (Choose three.)
- A. Point-in-time recovery must be enabled before the point in time to which you want to restore.
- B. The stand-alone DB system must remain active during the restore.
- C. A manual backup taken before the selected point in time must be available.
- D. Every user table must have a primary key.
- E. An automatic backup taken before the selected point in time must be available.
Answer: A,C,E
Explanation:
To restore a stand-alone DB system to a high-availability DB system with point-in-time recovery, the following are required:
B:Point-in-time recovery must be enabled before the point in time to which you want to restore: Point-in-time recovery (PITR) must be enabled beforehand to allow restoration to a specific point in time. C.An automatic backup taken before the selected point in time must be available: You need an automatic backup from before the desired restore point. D.A manual backup taken before the selected point in time must be available:
Manual backups are also essential to ensure you can restore to the desired point in time.
NEW QUESTION # 52
You have obtained a new tenancy on Oracle Cloud Infrastructure. You first create a VCN by using the VCN Wizard, and then create a MySQL DB system. You want to create a Connection in Database tools to use the SQL Worksheet feature.
Which three steps are required? (Choose three.)
- A. Create an OCI password.
- B. Import an X.509 certificate into the OCI vault.
- C. Create an OCI vault.
- D. Create an OCI secret.
- E. Create an encryption key.
Answer: A,B,D
Explanation:
To create a connection in Database Tools to use the SQL Worksheet feature, the following steps are required:
* Create an OCI password(Answer A): This password is necessary for authentication when connecting to the MySQL DB system.
* Create an OCI secret(Answer D): Secrets are used to store sensitive information like passwords securely. The secret will contain the database credentials.
* Import an X.509 certificate into the OCI vault(Answer E): This certificate is required for secure connections to the database, ensuring encrypted communication.
References:
* OCI Database Tools Documentation
* Using OCI Secrets
* X.509 Certificates Documentation
NEW QUESTION # 53
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