[2024] 1z0-915-1 Dumps are Available for Instant Access
Valid 1z0-915-1 Dumps for Helping Passing 1z0-915-1 Exam!
NEW QUESTION # 23
Which MySQL HeatWave AutoML routine evaluates a model?
- A. ML_EXPLAIN
- B. ML_SCORE
- C. ML_EXPLAIN_TABLE
- D. ML_PREDICT_TABLE
- E. ML_TRAIN
Answer: B
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 # 24
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 -h 10.0.1.221 -u admin -p MySQL8.0
- B. mysqlsh mysql://MySQL8.0:[email protected]
- C. mysqlsh -h10.0.1.221 -uadmin -pMySQL8.0
- D. mysqlsh mysql://admin:[email protected]
- E. mysqlsh -host 10.0.1.221 -user admin -password MySQL8.0
Answer: C,D
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 # 25
You want to enable high availability of a stand-alone DB system. Which two conditions are required? (Choose two.)
- A. The DB system delete protection must be enabled.
- B. The DB system crash recovery must be enabled.
- C. The DB system must be active.
- D. The DB system point-in-time recovery must be enabled.
- E. The DB system automatic backup must be enabled.
Answer: C,E
Explanation:
To enable high availability for a stand-alone DB system, the following conditions are required:
* The DB system must be active(Answer D): The DB system needs to be in an active state to enable high availability features.
* The DB system automatic backup must be enabled(Answer E): Automatic backups must be enabled to ensure data protection and facilitate failover operations.
Steps:
* Ensure the DB system is running and operational.
* Enable automatic backups through the OCI Console or API.
References:
* MySQL High Availability Documentation
* Automatic Backups Documentation
NEW QUESTION # 26
You have a MySQL DB system with five active read replicas. The workload consists of 5% writes and 95% reads.
Which connection method provides the fastest query response time?
- A. Connect to the read replica load balancer to perform read/write operations.
- B. Connect to the read replica load balancer to perform read-only operations.
- C. Connect to the source DB system to perform read-only operations.
- D. Connect to a specific read replica to perform read-only operations.
Answer: B
Explanation:
For a MySQL DB system with five active read replicas and a workload consisting mostly of reads, the fastest query response time is achieved by:
C:Connect to the read replica load balancer to perform read-only operations: The read replica load balancer distributes the read workload across all replicas, optimizing performance and response time.
NEW QUESTION # 27
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 query estimated cost is less than the query cost threshold.
- C. The use_secondary_engine session variable is OFF.
- 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,C,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 # 28
There are more than 10 concurrent users running queries on the DB system. The airport_geo table has been loaded successfully into a HeatWave cluster.
You want to run this query:
SELECT DISTINCT country FROM airport_geo ORDER BY country;
How do you determine whether the query is offloaded to the HeatWave cluster for execution?
- A. Query the rpd_tables table in performance_schema.
- B. View the Query Execution Plan of the query by running EXPLAIN.
- C. Check the value of the rapid_query_offload_count global status variable.
- D. Check the value of the hw_data_scanned global status variable.
Answer: C
Explanation:
To determine whether a query is offloaded to the HeatWave cluster for execution,check the value of the rapid_query_offload_countglobal status variable(Answer B).
* rapid_query_offload_count: This variable indicates the number of queries that have been offloaded to the HeatWave cluster. By checking its value before and after running the query, you can determine if the query was offloaded.
Steps:
* Connect to the MySQL DB system.
* RunSHOW GLOBAL STATUS LIKE 'rapid_query_offload_count';before and after executing the query to see if the count increases, indicating offloading.
References:
* MySQL HeatWave Documentation
* Monitoring HeatWave Status Variables
NEW QUESTION # 29
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 service gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the service 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 NAT gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the NAT gateway.
Answer: D
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 # 30
Which two are available when creating a new MySQL DB system in OCI Console? (Choose two.)
- A. Read replica
- B. High availability
- C. Lakehouse
- D. HeatWave cluster
- E. Standalone server
Answer: B,E
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 # 31
The following statements execute successfully:
CALL sys.ML_TRAIN('ml_data.iris', 'class', NULL, @model);
SELECT @model;
Which three are true? (Choose three.)
- A. The generated model handle is shown in the output.
- B. The training data set is obtained from the ml_data table in the iris schema.
- C. The statements create a classification model.
- D. The statements validate the data set but do not create a model.
- E. The target column is class.
Answer: A,C,E
Explanation:
The statementsCALL sys.ML_TRAIN('ml_data.iris', 'class', NULL, @model);andSELECT @model;are used to create and retrieve a machine learning model in MySQL HeatWave AutoML. The following are true:
* The generated model handle is shown in the output(Answer B): After training the model, the handle (identifier) for the model is stored in the@modelvariable and can be retrieved with theSELECT
@model;statement.
* The statements create a classification model(Answer C): TheML_TRAINprocedure is used to create a classification model since the target column (class) indicates a classification problem.
* The target column is class(Answer E): The second argument in theML_TRAINcall specifies the target column for the machine learning model, which isclassin this case.
References:
* MySQL HeatWave AutoML Documentation
* ML_TRAIN Procedure Documentation
NEW QUESTION # 32
Which is true about exporting data to Object Storage with MySQL Shell util.dumpInstance?
- A. You must provide an OCI username and password to gain write access to Object Storage.
- B. You must specify ociParManifest: true.
- C. You must specify ocimds: true.
- D. You must have a valid OCI CLI configuration.
Answer: B
Explanation:
When exporting data to Object Storage withMySQL Shell util.dumpInstance,you must specify ociParManifest: true(Answer B). This option creates a pre-authenticated request (PAR) manifest file, which allows for secure access and upload to Object Storage without requiring direct credentials.
References:
* MySQL Shell Documentation
* OCI Object Storage Documentation
NEW QUESTION # 33
Which is true about changing the storage size of a DB system?
- A. You cannot decrease the DB system's storage size.
- B. The DB system shuts down during the resize operation.
- C. You must stop the DB system before changing its storage size.
- D. You must increase the DB system's storage size in multiples of 100 GB.
Answer: A
Explanation:
When changing the storage size of a DB system,you cannot decrease the DB system's storage size(Answer B).
This restriction ensures data integrity and prevents potential data loss that could occur if the storage size were reduced.
* You can only increase the storage size of the DB system.
* The storage increase is done online without shutting down the DB system, allowing for uninterrupted
* operations.
References:
* OCI MySQL DB System Scaling Documentation
NEW QUESTION # 34
A DB system has been deleted successfully. Which two operations are allowed on the deleted DB system?
(Choose two.)
- A. Create a manual backup.
- B. Restore the DB system from an existing manual backup.
- C. Change the storage size.
- D. View the API call logs on the Audit page.
- E. View the metrics.
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 # 35
You have successfully enabled high availability of a stand-alone DB system. Which is true?
- A. The DB system has three instances running in different availability or fault domains.
- 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 provides new endpoints to connect to the secondary instances for read-only connections.
- D. The DB system performs load balancing by distributing client connections to all instances.
Answer: A
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 # 36
Which three must be provided when creating a channel? (Choose three.)
- A. Source connection password
- B. Channel name
- C. Replication delay
- D. Target DB system
- E. Source connection SSL mode
Answer: A,B,E
Explanation:
When creating a channel for replication in MySQL, the following must be provided:
* Channel name(Answer A): The unique identifier for the replication channel.
* Source connection SSL mode(Answer B): Specifies the SSL mode for the connection to the source server.
* Source connection password(Answer D): The password for the source server connection.
Steps:
* UseCHANGE MASTER TOcommand to set up the replication channel.
* Provide the channel name, SSL mode, and connection password as part of the configuration.
References:
* MySQL Replication Documentation
* Setting Up Replication Channels
NEW QUESTION # 37
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 public regional subnet
- B. A private regional subnet
- C. A private AD-specific subnet
- D. A public AD-specific subnet
Answer: A,B
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 # 38
What must you do to minimize a DB system down time caused by automatic maintenance operations?
- A. Add HeatWave cluster.
- B. Enable crash recovery.
- C. Create read replicas.
- D. Enable high availability.
Answer: D
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 # 39
Which type of configuration variables CANNOT be modified in MySQL custom configurations?
- A. Initialization variables
- B. Default user variables
- C. User variables
- D. System variables
Answer: A
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 # 40
......
Oracle 1z0-915-1 Exam Syllabus Topics:
| Topic | Details |
|---|---|
| Topic 1 |
|
| Topic 2 |
|
| Topic 3 |
|
| Topic 4 |
|
| Topic 5 |
|
| Topic 6 |
|
| Topic 7 |
|
| Topic 8 |
|
| Topic 9 |
|
Updated 1z0-915-1 Dumps Questions For Oracle Exam: https://exams4sure.pass4sures.top/MySQL-Database-Administration/1z0-915-1-testking-braindumps.html