1Z0-1093-25 Sample Questions & Answers
Revolves around five services weighted equally: provisioning the Exadata Database service alongside the Base Database service, running MySQL HeatWave, using the NoSQL Database Service, and managing databases through the OCI Database Management Service.
Launch the full 1Z0-1093-25 simulator →Showing 10 of 20 free samples.
- Question 1Beginner
Base Database Service - VM (BaseDB) · Patch and Upgrade BaseDB User Managed Components
True or False: When using a Base Database Service VM DB System, the customer is responsible for patching the guest operating system, the Grid Infrastructure, and the Oracle Database software.
Show answer & explanation
Correct answer: A
This statement is true. Base Database Service (for both VM and Bare Metal) is a user-managed service. While Oracle manages the underlying hardware and virtualization (in the case of VMs), the customer has root access to the guest OS and is fully responsible for all patching and maintenance of the software stack, including the OS, Grid Infrastructure, and Oracle Database.
- Question 2Intermediate
Base Database Service - VM (BaseDB) · BaseDB - Database Lifecycle Management
A development team needs a full copy of a 2 TB production database running on a BaseDB VM DB System for performance testing a new application feature. The goal is to create the copy as quickly as possible with minimal impact on the source production database. Which method should be used?
Show answer & explanation
Correct answer: C
The native 'Create Clone' feature in the OCI Console is the most efficient and recommended method. It leverages underlying storage snapshot capabilities and the latest backup to create a new, fully functional DB System with a copy of the database. This process is highly optimized for speed and minimizes performance impact on the source system.
- Question 3Advanced
Base Database Service - VM (BaseDB) · Describe Base Database Service
An architect is designing a BaseDB VM DB System for a write-intensive OLTP application that requires the highest possible IOPS and lowest latency. Cost is a secondary concern to performance. Which storage configuration should be selected during provisioning?
Show answer & explanation
Correct answer: A
This is the optimal configuration. ASM is the recommended storage manager for Oracle databases, providing better performance and manageability than LVM. The 'Higher Performance' setting for Block Volumes provides the highest IOPS (75 IOPS/GB, up to 300,000 IOPS per volume) and lowest latency available for network-attached block storage in OCI. This combination directly meets the requirement for maximum performance for a write-intensive workload.
- Question 4Intermediate
Base Database Service - VM (BaseDB) · BaseDB - Backup and Recovery
A DBA is tasked with configuring a custom backup retention policy for a BaseDB VM DB System. The requirement is to retain daily incremental backups for 14 days and the first full backup of each month for one year. How can this be achieved using the OCI Console?
Show answer & explanation
Correct answer: D
The OCI Console's automatic backup configuration allows for a 'Custom Policy'. This policy lets you define different retention periods for daily, weekly, monthly, and yearly backups. The DBA can set the daily retention to 14 days and the monthly retention to 12 months (one year) to meet the specified requirements directly through the console.
- Question 5Advanced
Exadata Database Service (ExaDB) · Exadata Database Service Management Interfaces & Utilities
An e-commerce platform running on Exadata Cloud Service experiences significant performance degradation during peak holiday sales. A DBA observes high 'cell physical IO bytes saved by smart scan' but also a high 'cell physical IO interconnect bytes returned by smart scan' metric. The application team confirms that queries are running slower than expected.
What is the most likely cause of this performance issue?
graph TD App[Application] --> |SQL Query| DB[Database Node] DB --> |Predicate Info| Cells[Storage Cells] subgraph Storage Cells A[Cell 1: Smart Scan] -->|Filtered Data| B(Interconnect) C[Cell 2: Smart Scan] -->|Filtered Data| B D[Cell 3: Smart Scan] -->|Filtered Data| B end B --> |Large Result Set| DB DB --> |Slow Response| AppShow answer & explanation
Correct answer: D
This is the correct diagnosis. A high 'bytes saved' indicates Smart Scan is working, but a high 'bytes returned' indicates that even after filtering, the remaining data being sent from the storage cells to the database nodes is very large. This suggests the queries are not selective enough (e.g.,
SELECT * FROM sales WHERE year=2024), causing a bottleneck on the interconnect network and overwhelming the DB nodes, which aligns with the observed slowdown. - Question 6Intermediate
Exadata Database Service (ExaDB) · Explain the Exadata Database Service
A European healthcare provider must deploy a new clinical data warehouse on Oracle Exadata. Due to stringent national laws, all patient data, encryption keys, and the hardware itself must physically reside within their own data center. However, they want to adopt a cloud subscription model to convert CapEx to OpEx and have Oracle manage the infrastructure hardware and software. Which Exadata service offering meets these strict requirements?
Show answer & explanation
Correct answer: C
Exadata Cloud@Customer is the only service that meets all the requirements. Oracle places Exadata hardware physically inside the customer's data center, addressing the strict data and hardware location laws. The service is sold as a cloud subscription (OpEx), and Oracle remotely manages the infrastructure up to the hypervisor, while the customer manages the VMs and databases. This provides the 'cloud at customer' experience they need.
- Question 7AdvancedSelect 3
Exadata Database Service (ExaDB) · Exadata Database Lifecycle Management
A DBA needs to apply a quarterly patch to the Grid Infrastructure and Database Homes on a 4-node Exadata Cloud Service VM Cluster with minimal downtime for the running production databases. Which THREE actions are part of the recommended rolling patch procedure? (Select THREE)
Show answer & explanation
Correct answers: A, C, D
Running the precheck is a critical first step in any patching operation. It validates the environment and helps prevent patch failures by identifying conflicts or issues ahead of time.
The patching process for Exadata Cloud Service is automated. The DBA initiates it through the Console or CLI, and the service's tooling handles the rolling application, draining services from one node, patching it, and then moving to the next.
The automated rolling patch process includes health checks. It ensures that after a node is patched and brought back into the cluster, all services are running correctly before it moves on to the next node. This prevents a cascading failure.
- Question 8Advanced
Exadata Database Service (ExaDB) · Exadata Database Lifecycle Management
A large retail corporation is planning to migrate their 50 TB mission-critical Oracle RAC database from an on-premises Exadata X6M to Exadata Cloud Service (ExaCS). The primary business driver is to reduce data center footprint while maintaining performance. A key constraint is that the production downtime for the final cutover must be less than 30 minutes.
The network team has already provisioned a 10 Gbps FastConnect link between their data center and the OCI region. The database version on-premises is 19c, and they plan to use the same version on ExaCS. The DBAs need to ensure a reliable, fallback-capable migration process.
Which migration strategy should the solution architect propose?
Show answer & explanation
Correct answer: C
This is the ideal solution for near-zero downtime migration. By setting up a physical standby on ExaCS and synchronizing it with the on-premises primary via Data Guard, the data is kept current. The final cutover is a simple, fast
switchoveroperation, which typically completes in minutes, easily meeting the <30 minute requirement. It also provides a straightforward fallback mechanism by allowing a switchover back to the on-premises primary if any issues arise. - Question 9Intermediate
Exadata Database Service (ExaDB) · Exadata Database Service Management Interfaces & Utilities
A database administrator is managing a large Exadata Cloud Service VM Cluster with eight nodes. They need to run a diagnostic script (
/usr/local/bin/diag.sh) simultaneously on all eight database nodes to collect performance data. Which Exadata utility is designed for this specific purpose of executing a command on all nodes in a cluster from a single node?Show answer & explanation
Correct answer: C
The
dcliutility is specifically designed to execute commands and scripts in parallel across multiple database nodes in a cluster. The DBA would use a command likedcli -g all_nodes -l user /usr/local/bin/diag.shto achieve the desired outcome, making it the correct tool for this task. - Question 10Beginner
Exadata Database Service (ExaDB) · Provision Exadata Database Service
When provisioning an Exadata Cloud Service infrastructure, an administrator must configure two distinct networks: a Client Network and a Backup Network. What is the primary purpose of separating these two networks?
Show answer & explanation
Correct answer: D
This is the correct answer. Database backups can generate a massive amount of network traffic. By directing this traffic over a dedicated Backup Network to services like Object Storage, it prevents the Client Network from becoming saturated. This ensures that application performance and client connectivity are not negatively impacted during backup operations.
Ready for the real thing?
The full 1Z0-1093-25 simulator has every exam-style question, timed mode, and instant scoring.