Oracle 1Z0-1093-26 Real Exam Questions [October 2026 Update]

The distinction between a VM DB System and a Bare Metal DB System is the most straightforward architectural concept in this exam – and yet it is where candidates first lose points because they apply the wrong mental model. A VM DB System runs Oracle Database inside a virtual machine on shared physical infrastructure. It offers flexible shapes, cost-effective pricing, and the ability to scale CPU and storage independently without touching the underlying hardware. A Bare Metal DB System runs Oracle Database directly on a dedicated physical server – no virtualisation layer, no shared hardware, no neighbours. BM DB Systems provide maximum CPU and I/O performance because database workloads access the hardware directly, but they require a full server and offer less shape flexibility than VM systems. The exam does not ask candidates to memorise specification tables. It asks them to choose the correct deployment model for a described workload requirement – and those requirements are always multidimensional: a latency-sensitive OLTP application with strict performance SLAs that cannot tolerate noisy-neighbour effects is a BM question; a development environment that needs flexible CPU allocation and must stay within a cost ceiling is a VM question.

The patching model for Base Database Service is what separates Cloud Database Service professionals from on-premises DBAs who have moved to OCI without fully understanding the cloud lifecycle model. On-premises patching is a DBA-controlled operation – the DBA downloads patches, applies them to an Oracle Home, and manages the patching schedule. In Oracle Base Database Service, patching operates differently: the OCI service manages patching at the infrastructure level (Grid Infrastructure patching), and the database DBA is responsible for patching at the database home level (Oracle Database patching). The two layers are patched independently. The exam tests this separation specifically – which patching operation is the DBA’s responsibility versus which is managed by the OCI service – and tests the dbcli tool as the command-line interface for performing database-level patching operations on VM DB Systems.

The Exadata Database Service on OCI introduces a third patching and lifecycle model: the Exadata Fleet Update service. Exadata Fleet Update standardises, simplifies, and automates Oracle Database and Grid Infrastructure patching across multiple Exadata systems – allowing a DBA team to manage patching for an entire fleet of Exadata databases through a single coordinated workflow rather than patching each system individually. The exam tests Exadata Fleet Update as the correct operational approach for organisations running multiple Exadata systems on OCI, and distinguishes it from the per-system dbcli patching approach used on VM DB Systems.

Exam Snapshot

Domain 1: Base Database Service – VM and Bare Metal DB Systems

DB System provisioning: A VM DB System is provisioned by selecting the compute shape (CPU count and memory – either a fixed shape like VM.Standard.E4.Flex or a flex shape where CPU and memory are specified independently), the Oracle Database edition (Standard Edition 2 or Enterprise Edition), the database version, the subnet and VCN for network placement, and the storage configuration (block volume storage size and backup retention policy).

BM DB Systems are provisioned similarly but the shape is a physical server specification – BM.Standard.E5, for example – with a fixed CPU and memory allocation. BM DB Systems support more storage and higher I/O throughput than VM equivalents at equivalent core counts because database I/O goes directly to NVMe drives without a virtualisation hypervisor layer.

DB System shapes and scaling: VM DB System shapes can be changed after provisioning – scaling CPU up or down without reprovisioning the database. This shape change operation is tested as a cloud-specific capability that on-premises databases cannot perform. BM DB System shape changes require deprovisioning and reprovisioning.

Data Guard on Base Database Service: Oracle Data Guard provides HA and DR for Base Database Service by maintaining a standby database that is continuously synchronised with the primary. The OCI console and API automate Data Guard association – selecting the standby subnet, the protection mode (Maximum Performance, Maximum Availability, or Maximum Protection), and the standby DB System shape. The exam tests Data Guard setup as a console-driven workflow rather than a manual command-line procedure, and tests cross-region Data Guard (where the primary and standby are in different OCI regions) as a 2026 capability specifically.

Backup and restore: Base Database Service supports automatic backups to OCI Object Storage (scheduled daily, with configurable retention of 7 to 60 days) and on-demand manual backups. The Autonomous Recovery Service is the 2026 default backup destination – a managed backup service that provides continuous data protection and guaranteed recovery point objectives below those available with traditional RMAN backups. The exam tests Autonomous Recovery Service as the modern backup target distinct from Object Storage-backed RMAN backups.

Patching: At the infrastructure level (Grid Infrastructure), OCI manages patching automatically. At the database home level, the DBA initiates patching through the OCI console or the dbcli command-line tool. The exam tests dbcli as the CLI tool for VM DB System database operations – distinct from the ExaCLI and dbaascli tools used on Exadata systems.

Monitoring and management interfaces: The OCI console provides health and performance metrics for DB Systems – CPU utilisation, storage IOPS, Data Guard lag, and availability status. The OCI CLI and REST API provide programmatic access to all management operations. The Oracle Cloud Agent running on each DB System node enables the OCI Monitoring and Logging services to collect database-level metrics and logs.

Domain 2: Exadata Database Service

Exadata Database Service on OCI provides Oracle Exadata hardware in OCI data centres – the full Exadata stack (database servers, storage cells, high-speed InfiniBand interconnect) managed as a cloud service. Compared to Base Database VM DB Systems, Exadata provides:

• Massively higher storage throughput (Exadata Smart Scan, storage offloading)
• In-memory columnar processing (Database In-Memory with Exadata Smart Flash Cache)
• Automatic memory and I/O management by Exadata software
• Support for very large databases that would require multiple VM DB Systems

Exadata shapes and infrastructure options: ExaDB Dedicated is provisioned on dedicated Exadata infrastructure within OCI – the customer’s Exadata systems run on hardware that is not shared with other tenants. The Exadata infrastructure (rack, storage servers, database servers) is provisioned first, then the VM Cluster (the logical RAC cluster on the Exadata), then databases within the cluster.

Exadata Cloud@Customer: Exadata Cloud@Customer deploys Oracle-managed Exadata hardware within the customer’s own data centre – providing cloud-managed Exadata for workloads that cannot move to a public OCI data centre due to data residency requirements. The exam tests Exadata Cloud@Customer as the solution for regulatory or latency requirements that prevent public cloud placement.

Exadata lifecycle management: Creating databases on Exadata involves configuring the Exadata infrastructure, the VM Cluster (which establishes the RAC nodes), and then the database homes and databases within the cluster. The exam tests this three-tier provisioning hierarchy as distinct from the flat DB System provisioning model used for Base Database.

Exadata Fleet Update: Exadata Fleet Update coordinates Oracle Database and Grid Infrastructure patching across multiple Exadata systems simultaneously – providing a consistent, automated patching workflow that reduces manual effort and ensures all fleet members are at the same patch level. The exam tests Fleet Update as the Exadata-specific patching management tool.

ExaCLI and dbaascli: ExaCLI is the Exadata-specific command-line interface for managing Exadata infrastructure operations. dbaascli is the cloud DBA tool for managing Oracle Database operations on both VM DB Systems and Exadata – creating databases, cloning, patching at the database level. The exam tests ExaCLI and dbaascli as Exadata-specific tools, contrasting them with the dbcli tool used on Base Database VM DB Systems.

Maximum Availability Architecture (MAA) on Exadata: MAA is Oracle’s best practices framework for achieving the highest Oracle Database availability. On Exadata, MAA includes Real Application Clusters (RAC) for node-level redundancy within the cluster, Data Guard for regional-level DR, and Exadata’s built-in redundancy (ASM disk groups with high redundancy). The exam tests MAA configuration as the combination of these technologies, not as a single feature.

Domain 3: MySQL Database Service and NoSQL Database Service

MySQL Database Service (MDS): OCI’s managed MySQL database – Oracle manages the underlying infrastructure, patching, and backups. MDS is appropriate for LAMP-stack web applications, microservices backends, and read-heavy web workloads. The exam tests MDS setup including: backup configuration (automatic daily backups with configurable retention), High Availability configuration (three-node group replication across three availability domains for HA), and HeatWave – Oracle’s in-memory query accelerator for MySQL that dramatically accelerates analytics queries without ETL to a separate data warehouse.

MySQL HeatWave: HeatWave adds an in-memory columnar processing cluster to MySQL – allowing analytical queries that would normally require a data warehouse to run directly against the MySQL transactional database. The exam tests HeatWave as the MySQL-native analytics capability, distinct from migrating data to Oracle Autonomous Data Warehouse.

NoSQL Database Service: OCI’s managed Apache Cassandra-compatible NoSQL database – providing schema-flexible, horizontally scalable storage for key-value, document, and wide-column data models. The exam tests NoSQL data models (key-value, document, table/wide-column) and when NoSQL is the correct database choice versus Oracle Database or MySQL – the NoSQL answer is for workloads requiring extreme horizontal read/write scalability with flexible schema and eventual consistency.

Domain 4: Data Guard and High Availability

Data Guard configurations tested: Synchronous redo log shipping (Maximum Availability and Maximum Protection modes – no transactions commit on the primary until the standby has received the redo, guaranteeing zero data loss at the cost of primary transaction latency) versus asynchronous shipping (Maximum Performance mode – the primary commits without waiting for standby acknowledgement, allowing distance-spanning DR with no primary latency impact but a small RPO window).

Switchover vs. failover: Switchover is a graceful, planned role reversal – both primary and standby are available, the primary is gracefully shut down, and the standby is activated as the new primary with no data loss. Failover is an emergency activation of the standby when the primary has failed – there may be a small data loss window under Maximum Performance mode. The exam tests both operations as specific DBA actions with different preconditions and data loss implications.

Active Data Guard: Active Data Guard allows the standby database to be open for read-only queries while still receiving and applying redo from the primary. This offloads read workloads from the primary to the standby – improving primary performance and utilising the standby for productive work between DR events. The exam tests Active Data Guard as an additional Data Guard option that requires Enterprise Edition.

5 Study Tips for Oracle 1Z0-1093-26

• Study VM DB System versus BM DB System as a scenario-matching decision – know which workload characteristics (latency sensitivity, cost constraint, shape flexibility, isolation requirement) drive each choice.
• Study the patching layer model: OCI manages infrastructure/Grid Infrastructure patching; the DBA manages database home patching via dbcli (VM/BM) or dbaascli (Exadata). Know which tool belongs to which system.
• Study the Exadata three-tier provisioning hierarchy (Infrastructure → VM Cluster → Database) as distinct from the flat Base Database DB System model.
• Study Data Guard protection modes and the switchover vs. failover distinction – know which mode accepts primary latency impact in exchange for zero RPO, and which reversal operation requires both systems to be available.
• Practice with Cert Empire’s 1Z0-1093-26 exam questions covering all four domain areas at DB System shape selection, patching layer model, Exadata lifecycle, and Data Guard protection mode depth.

Best Study Resources

• Cert Empire 1Z0-1093-26 exam questions PDF and practice simulator (October 2026 edition).
• Oracle official 1Z0-1093-26 exam page (education.oracle.com – search “1Z0-1093-26”).
• Oracle Base Database Service documentation (docs.oracle.com/en-us/iaas/dbcs/).
• Oracle Exadata Database Service documentation (docs.oracle.com/en-us/iaas/exadatacloud/).
• Oracle University: Implementing Oracle Cloud Database Services course.

Why Candidates Choose Cert Empire for Oracle 1Z0-1093-26 Preparation

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Every solution in our 1Z0-1093-26 question bank links directly to the relevant official Oracle documentation – the Base Database Service guide, Exadata documentation, or the specific OCI database service reference behind the answer.

Deep Knowledge – Every Answer, Every Option, Fully Explained

Every 1Z0-1093-26 question includes a complete explanation covering not just why the correct DB System type, patching tool, or Data Guard mode is right, but precisely why each incorrect option fails – whether it assigns Grid Infrastructure patching to the DBA rather than OCI, uses Exadata’s three-tier provisioning model for a Base Database scenario, or selects Maximum Availability mode where Maximum Performance is the correct zero-primary-impact choice. Each explanation references the specific Oracle database cloud documentation behind the answer.

Interactive Practice Simulator – Think Like the Exam

Our simulator presents Oracle Cloud Database Service scenarios exactly as the real 1Z0-1093-26 exam does – describing a workload requirement, a patching task, or a DR design problem and testing which deployment model, CLI tool, or Data Guard configuration correctly addresses it. Per-question feedback explains the full database cloud reasoning behind every correct and incorrect option.

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FAQ’s

What is the Oracle 1Z0-1093-26 certification?

1Z0-1093-26 is the Oracle Cloud Database Services 2026 Professional exam. It validates expertise in deploying and managing Oracle database services on OCI – covering Base Database Service (VM and Bare Metal DB Systems), Exadata Database Service, MySQL Database Service, NoSQL Database Service, Data Guard, patching, backup, and high availability.

What is the difference between a VM DB System and a Bare Metal DB System?

A VM DB System runs Oracle Database inside a virtual machine on shared OCI infrastructure – offering flexible shapes and cost-effective pricing with the ability to scale CPU independently. A Bare Metal DB System runs directly on dedicated physical hardware with no virtualisation – providing maximum performance and isolation for latency-sensitive or high-throughput workloads that cannot share infrastructure.

Who is responsible for patching in Oracle Base Database Service?

OCI manages patching at the infrastructure and Grid Infrastructure level automatically. The DBA is responsible for patching at the Oracle Database home level, initiated through the OCI console or the dbcli command-line tool on VM DB Systems. The two layers are patched independently.

What is Exadata Fleet Update?

Exadata Fleet Update is Oracle’s managed service for coordinating Oracle Database and Grid Infrastructure patching across multiple Exadata systems simultaneously. It standardises and automates patching across an Exadata fleet – ensuring all systems are at the same patch level through a single coordinated workflow rather than patching each system individually.

What is the difference between Data Guard switchover and failover?

Switchover is a planned, graceful role reversal – both primary and standby must be available, the primary is gracefully stopped, and the standby is activated as the new primary with zero data loss. Failover is an emergency activation when the primary has failed – it activates the standby regardless of primary availability, and may involve a small data loss window under Maximum Performance mode.

What is MySQL HeatWave?

HeatWave is Oracle’s in-memory columnar query accelerator for MySQL Database Service. It allows analytical queries to run directly against the MySQL transactional database at high speed without ETL to a separate analytical system – providing both OLTP and analytics capability in one managed MySQL instance.

What is the passing score for the 1Z0-1093-26 exam?

The passing score is 68%. The exam is multiple-choice format delivered through Pearson VUE either online-proctored or at a test centre. The cost is USD $245.

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