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1z0-915-1 Exam PDF [2024] Tests Free Updated Today with Correct 67 Questions
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NEW QUESTION # 40
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 ALL PRIVILEGES ON *.* TO admin2 WITH GRANT OPTION;
- B. CREATE USER admin2 IDENTIFIED BY 'Password'; GRANT AUDIT_ADMIN,
BACKUP_ADMIN, SESSION_VARIABLES_ADMIN ON *.* TO admin2 WITH GRANT OPTION; - C. CREATE USER admin2 IDENTIFIED BY 'Password' DEFAULT ROLE 'administrator';
- D. CREATE USER admin2 IDENTIFIED BY 'Password'; GRANT SUPER ON *.* TO admin2 WITH GRANT OPTION;
Answer: A
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 # 41
Which type of configuration variables CANNOT be modified in MySQL custom configurations?
- A. Default user variables
- B. Initialization variables
- C. System variables
- D. User variables
Answer: B
Explanation:
Initialization variables(Answer A) cannot be modified in MySQL custom configurations. These variables are set at the start of the MySQL service and are not changeable without restarting the service.
* Initialization variables are parameters that define how the MySQL server initializes.
* Changes to these variables require restarting the MySQL server to take effect.
* Examples include variables likeinnodb_buffer_pool_size, which determine memory allocation settings on startup.
References:
* MySQL Configuration Variables Documentation
NEW QUESTION # 42
Which two are true about creating a new DB system with data import? (Choose two.)
- A. The data must be created with MySQL Enterprise Backup.
- B. The data must be stored in an Object Storage bucket in the same OCI region as the new DB system.
- C. The data must be created with the mysqldump client utility.
- D. A valid pre-authenticated request must be provided to access the data.
- E. The files containing the data must be uploaded through OCI Console on the "Create DB system" page.
Answer: B,D
Explanation:
When creating a new DB system with data import, the following conditions apply:
* The data must be stored in an Object Storage bucket in the same OCI region as the new DB system(Answer C): This ensures that the data is readily accessible and can be efficiently imported into the new DB system.
* A valid pre-authenticated request must be provided to access the data(Answer D): This allows secure access to the data stored in the Object Storage bucket without needing to handle credentials directly.
References:
* OCI Object Storage Documentation
* Pre-Authenticated Requests Documentation
NEW QUESTION # 43
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 AD-specific subnet
- C. A public regional subnet
- D. A private regional subnet
Answer: C,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 # 44
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. Enable crash recovery.
- D. Add HeatWave cluster.
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 # 45
How can you determine the uptime of a DB system?
- A. By checking the DB system details in the OCI Web console
- B. By querying performance_schema.global_status from a connected MySQL client
- C. By executing mysql db-system get --db-system-id with OCI CLI
- D. By using the Audit section in Logging information in the OCI Web console
Answer: A
Explanation:
You can determine the uptime of a DB system bychecking the DB system details in the OCI Web console(Answer B). The console provides information on the system status, including the uptime since the last start.
Steps:
* Log in to the OCI Web console.
* Navigate to the MySQL DB system.
* View the details page of the DB system, where the uptime information is displayed.
References:
* OCI Console Documentation
* Monitoring DB System Uptime
NEW QUESTION # 46
You want to create a custom configuration for the MySQL DB system in OCI Console. Which three can you set? (Choose three.)
- A. Subnet
- B. Compartment
- C. Shape
- D. VCN
- E. Description
Answer: B,C,D
Explanation:
When creating a custom configuration for the MySQL DB system in OCI Console, you can set the following:
A:Shape: This defines the compute resources (CPU, memory) allocated to the DB system. B.VCN (Virtual Cloud Network): This defines the network in which your DB system will be placed. E.Compartment: This is an OCI resource management feature that allows you to organize and isolate your cloud resources.
NEW QUESTION # 47
You have successfully enabled high availability of a stand-alone DB system. Which is true?
- A. The DB system provides new endpoints to connect to the secondary instances for read-only connections.
- B. The DB system provides new port numbers on the same endpoint to connect to the secondary instances for read-only connections.
- C. The DB system performs load balancing by distributing client connections to all instances.
- D. The DB system has three instances running in different availability or fault domains.
Answer: D
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 # 48
Which three are features of MySQL AutoPilot? (Choose three.)
- A. Auto thread pooling
- B. Auto encoding
- C. Auto provisioning
- D. AutoML
- E. Auto backup
Answer: B,C,D
Explanation:
The following are features of MySQL AutoPilot:
* Auto encoding(Answer C): MySQL AutoPilot automatically determines the best encoding for data to optimize storage and performance.
* Auto provisioning(Answer D): MySQL AutoPilot can automatically provision additional resources based on workload demands, ensuring optimal performance.
* AutoML(Answer E): MySQL AutoPilot includes AutoML capabilities, which automate the process of machine learning model selection, training, and deployment.
References:
* MySQL HeatWave AutoPilot Documentation
* MySQL AutoPilot Features
NEW QUESTION # 49
You create a MySQL DB system with default port numbers, and attach it to a subnet.
Which configuration is required on the subnet to enable client applications to connect to the DB system?
- A. Create an ingress rule that allows stateful connections on port 3306 and 33060.
- B. Create an egress rule that allows stateful connections on port 3306 and 33060.
- C. Create an egress rule that allows stateless connections on port 3306 and 33060.
- D. Create an ingress rule that allows stateless connections on port 3306 and 33060.
Answer: A
Explanation:
To enable client applications to connect to a MySQL DB system that uses default port numbers and is attached to a subnet, you need tocreate an ingress rule that allows stateful connections on port 3306 and 33060(Answer C).
* Ingress Rule: An ingress rule specifies the types of inbound connections that are allowed to a resource within a subnet.
* Stateful Connections: Stateful connections keep track of the state of network connections passing through them, allowing return traffic to pass automatically.
Steps:
* Navigate to the Virtual Cloud Network (VCN) in the OCI Console.
* Open the subnet to which the MySQL DB system is attached.
* Add an ingress rule to the subnet's security list to allow traffic on port 3306 (MySQL) and 33060 (MySQL X Protocol).
* Ensure the rule is stateful to maintain the connection state.
References:
* OCI Networking Documentation
* MySQL X Protocol Documentation
NEW QUESTION # 50
Which two are true about data loaded into a MySQL HeatWave cluster? (Choose two.)
- A. Data is replicated across cluster nodes for high availability.
- B. Data is stored locally in each cluster node's solid state disks (SSD) to increase I/O performance.
- C. Data is partitioned across cluster nodes for scalability.
- D. Data is stored in hybrid columnar format to speed up analytic queries.
- E. Data rows are sorted on the primary key to speed up range search.
Answer: C,D
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 # 51
Which operation is necessary before enabling a MySQL HeatWave cluster?
- A. Start Cloud Shell in OCI Console connected to the DB system's network.
- B. Create a DB system with a HeatWave shape.
- C. Offload the data to object storage to facilitate reloading into the cluster.
- D. Create all the schemas and tables in the DB system but do not load the data.
Answer: B
Explanation:
Before enabling a MySQL HeatWave cluster,you must create a DB system with a HeatWave shape(Answer D). The HeatWave shape includes the necessary resources and configuration to support the HeatWave in-memory query accelerator.
Steps:
* Create a MySQL DB system in OCI Console.
* Choose a HeatWave shape during the DB system creation process.
* Once the DB system is created, you can enable and configure the HeatWave cluster.
References:
* MySQL HeatWave Documentation
NEW QUESTION # 52
You want to train a classification model with MySQL HeatWave AutoML. Which two are requirements of the training data set? (Choose two.)
- A. There must be at least two feature columns.
- B. The target column must have at least two distinct values.
- C. The target column and all feature columns must be stored in a single table.
- D. All feature columns must be numeric.
- E. The target column must be numeric.
Answer: B,C
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 # 53
Which MySQL HeatWave AutoML routine evaluates a model?
- A. ML_SCORE
- B. ML_TRAIN
- C. ML_PREDICT_TABLE
- D. ML_EXPLAIN_TABLE
- E. ML_EXPLAIN
Answer: A
Explanation:
The MySQL HeatWave AutoML routine that evaluates a model isML_SCORE. This routine scores a trained machine learning model on a new dataset and evaluates its performance.
NEW QUESTION # 54
What is the benefit of creating a new DB system with data import?
- A. Faster backup with a first full backup
- B. Smaller storage size with better compression
- C. Consistent data with no user connection
- D. Faster import with minimal logging
Answer: D
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 # 55
Which two methods can be used to stop a DB system? (Choose two.)
- A. Use the STOP action on the DB system details page in the OCI Console.
- B. Run the shutdown command from a mysqladmin client logged in as the admin user.
- C. Run the SHUTDOWN SQL statement from any connected client logged in as the admin user.
- D. Execute the mysql db-system stop command from OCI CLI.
Answer: A,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 # 56
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