(Jan-2025) 1z0-915-1 Exam Dumps Contains FREE Real Quesions from the Actual Exam
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NEW QUESTION # 39
Which two are true about creating a new DB system with data import? (Choose two.)
- A. The files containing the data must be uploaded through OCI Console on the "Create DB system" page.
- B. The data must be created with the mysqldump client utility.
- C. A valid pre-authenticated request must be provided to access the data.
- D. The data must be created with MySQL Enterprise Backup.
- E. The data must be stored in an Object Storage bucket in the same OCI region as the new DB system.
Answer: C,E
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 # 40
A port-forwarding Bastion session has been created for a MySQL DB system listening on 10.10.1.187:3306.
The SSH command provided by the Bastion session is:
An SSH tunnel is created successfully on a client machine by running this command:
Which command connects to the MySQL DB System from the client machine?
- A. mysqlsh mysql://[email protected]:3311
- B. mysqlsh mysql://[email protected]:3306
- C. mysqlsh mysql://[email protected]:3311
- D. mysqlsh mysql://[email protected]:3306
Answer: A
Explanation:
Given the SSH command sets up port forwarding from the local port3311to the remote MySQL DB system port3306, the correct command to connect to the MySQL DB system from the client machine is:
C:mysqlsh mysql://[email protected]:3311
This command connects to the local machine's port3311, which forwards the connection to the MySQL DB system at10.10.1.187:3306.
NEW QUESTION # 41
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 SUPER ON *.* TO admin2 WITH GRANT OPTION;
- 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' DEFAULT ROLE 'administrator';
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 # 42
You want to create a read replica on a DB system.
Which is true about the read replica?
- A. It must be a bare metal shape
- B. It must have at least 4 OCPUs.
- C. It must have at least 1 TB of storage
- D. lt must have at least 64 GB of memory.
Answer: D
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 # 43
You want to determine which version of MySQL is running on your DB system.
Which two SQL statements show the MySQL version? (Choose two.)
- A. SELECT @version;
- B. SHOW STATUS LIKE 'version';
- C. select @@version;
- D. SHOW VARIABLES LIKE 'version';
- E. SELECT * FROM performance_schema.global_status WHERE VARIABLE_NAME='version';
Answer: C,D
Explanation:
To determine the version of MySQL running on your DB system, you can use the following SQL statements:
* SELECT @@version;(Answer B): This query retrieves the MySQL server version from the system variables.
* SHOW VARIABLES LIKE 'version';(Answer C): This query displays the server version along with other related version variables.
Steps:
* Connect to your MySQL DB system.
* Execute eitherSELECT @@version;orSHOW VARIABLES LIKE 'version';to retrieve the version information.
References:
* MySQL Server Version Information
* SHOW VARIABLES Syntax
NEW QUESTION # 44
You create a new MySQL DB system. It fails because you use mysql.sys as the administrator username.
What is the reason?
- A. mysql.sys is a reserved username that cannot be used in customer-defined user accounts.
- B. The username cannot contain non-alphanumeric characters, such as a period.
- C. The username must have at least 10 characters.
- D. The username can contain only uppercase characters.
Answer: A
Explanation:
The MySQL usermysql.sysis a reserved username used by the system for internal purposes. It cannot be used as a customer-defined user account to prevent conflicts with the system operations and maintain the integrity of the database's internal workings.
NEW QUESTION # 45
Which is true about exporting data to Object Storage with MySQL Shell util.dumpInstance?
- A. You must have a valid OCI CLI configuration.
- B. You must specify ociParManifest: true.
- C. You must provide an OCI username and password to gain write access to Object Storage.
- D. You must specify ocimds: true.
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 # 46
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 provides new endpoints 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 # 47
You want to create a custom configuration for the MySQL DB system in OCI Console. Which three can you set? (Choose three.)
- A. Compartment
- B. Description
- C. VCN
- D. Subnet
- E. Shape
Answer: A,C,E
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 # 48
What must be enabled for using the point-in-time recovery feature in a DB system?
- A. Delete protection
- B. High availability
- C. Automatic backups
- D. HeatWave cluster
Answer: C
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 # 49
What must you do before deleting a DB system?
- A. Take a manual backup
- B. Stop and remove any connected HeatWave Cluster.
- C. Disable delete protection if it is enabled.
- D. Stop the instance if it is running.
Answer: C
Explanation:
Before deleting a DB system in Oracle Cloud Infrastructure (OCI), you mustdisable delete protection if it is enabled(Answer C). Delete protection is a feature that prevents accidental deletion of DB systems. If enabled, it must be turned off before the DB system can be deleted.
Steps:
* Navigate to the DB system in the OCI Console.
* Check if delete protection is enabled.
* If enabled, disable it by updating the DB system settings.
* Proceed with deleting the DB system.
References:
* OCI Console Documentation on DB System Management
* MySQL Database Service Documentation
NEW QUESTION # 50
What happens when you perform a switchover of a high-availability DB system with an attached HeatWave cluster?
- A. The HeatWave cluster is deleted and a new HeatWave cluster is attached to the new primary instance.
- B. The HeatWave cluster is no longer valid; you must re-create the HeatWave cluster.
- C. The HeatWave cluster remains attached to the same DB system and the new primary instance redirects queries to that 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 # 51
What is the benefit of creating a new DB system with data import?
- A. Faster backup with a first full backup
- B. Consistent data with no user connection
- C. Smaller storage size with better compression
- 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 # 52
Which is true about automatic DB system version upgrades?
- A. The DB system is upgraded to the next release in sequence.
- B. The DB system is never upgraded automatically.
- C. The DB system is upgraded to the most recent release.
- D. You must specify the next version to be used before the upgrade.
Answer: A
Explanation:
Automatic DB system version upgrades in OCI are performed to the next release in sequence. This means that the system is upgraded to the next available version rather than skipping to the most recent release, ensuring a stable and tested upgrade path.
NEW QUESTION # 53
Which operation is necessary before enabling a MySQL HeatWave cluster?
- A. Create a DB system with a HeatWave shape.
- B. Start Cloud Shell in OCI Console connected to the DB system's network.
- 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: A
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 # 54
The following statements are executed successfully:
Which two are true? (Choose two.)
- A. The data of the airport table is loaded into the MySQL DB system.
- B. The airport.tbl file is in CSV format.
- C. The data placement key of the airport table is airport_id.
- D. Every row in the airport table has a unique airport_id value.
- E. The fields in the airport.tbl file are delimited by comma.
Answer: A,C
Explanation:
Based on the provided SQL statements, the following two are true:
* The data placement key of the airport table is airport_id(Answer A): The primary keyairport_idis used as the data placement key in theairporttable. This means that the data in the table is organized based on theairport_idvalues.
* The data of the airport table is loaded into the MySQL DB system(Answer D): TheALTER TABLE airport SECONDARY_LOAD;statement successfully loads the data from the specified object storage file into the MySQL DB system.
References:
* MySQL HeatWave Documentation
* MySQL Engine Attributes
NEW QUESTION # 55
Which two are true about read replica load balancer? (Choose two.)
- A. User accounts containing a client host name cannot connect to the read replica load balancer.
- B. It distributes connections among the source DB system and all read replicas.
- C. It has the same endpoint as the DB system.
- D. It is created when the DB system is first created.
- E. It distributes connections among read replicas.
Answer: B,E
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 # 56
What must you do to minimize a DB system down time caused by automatic maintenance operations?
- A. Add HeatWave cluster.
- B. Create read replicas.
- C. Enable high availability.
- D. Enable crash recovery.
Answer: C
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 # 57
The first query has an estimated cost of 100,000,000 and is offloaded to a HeatWave cluster for execution:
SELECT flightno, departure, country FROM flight JOIN airport_geo ON 'from'=airport_id; The second query has an estimated cost of 10,000 and is NOT offloaded to the Heatwave cluster for execution:
SELECT DISTINCT country FROM airport_geo ORDER BY country;
Which two methods can offload the second query to the Heatwave cluster for execution? (Choose two.)
- A. CALL sys.heatwave_advisor(JSON_OBJECT("auto_enc", JSON_OBJECT("mode", "recommend")));
- B. SET secondary_engine_cost_threshold=1000;
- C. SET optimizer_trace="enabled=on";
- D. CALL sys.heatwave_load('["airport_geo"]');
- E. SET use_secondary_engine=FORCED;
Answer: B,E
Explanation:
To offload the second query to the HeatWave cluster for execution, you can use the following methods:
* SET use_secondary_engine=FORCED(Answer A): This forces the use of the HeatWave secondary engine for query execution, regardless of the estimated cost.
* SET secondary_engine_cost_threshold=1000(Answer B): This lowers the cost threshold for queries to be offloaded to the HeatWave cluster, allowing queries with lower estimated costs to be offloaded.
Steps:
* Before running the second query, executeSET use_secondary_engine=FORCED;to force the offloading of queries to HeatWave.
* Alternatively, executeSET secondary_engine_cost_threshold=1000;to adjust the cost threshold, making the second query eligible for offloading.
NEW QUESTION # 58
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