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1Z0-997-26 · domain

Databases

Practise Oracle Cloud Infrastructure 2026 Architect Professional (1Z0-997-26) (1Z0-997-26) Databases practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

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What to know about Databases

Databases questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common Databases exam traps

  • Answering from memory before reading the full scenario.
  • Missing a constraint such as cost, availability, security, scope or command context.
  • Choosing a broad answer when the question asks for the most specific fix.
  • Ignoring why the wrong options are tempting.

Question index

All Databases questions (52)

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1

What is the primary architectural advantage of using Exadata Database Service on Dedicated Infrastructure compared to Exadata Database Service on Cloud@Customer?

Easy
2

An organization running an Oracle Exadata Database Service requires compliance auditing where all database administrative actions and sensitive data queries must be logged, tamper-proof, and retained in an isolated repository. Which combination of OCI and Oracle Database features provides this capability?

Hard
3

When provisioning an Oracle Base Database system on OCI, which storage management architecture is utilized by default for storing database files (datafiles, redo logs, control files)?

Easy
4

You are configuring an Autonomous Database instance and need to restrict incoming database traffic so that only specific corporate subnet CIDR blocks can access the database service endpoints. Which feature should you configure?

Medium
5

You are designing a cross-region disaster recovery strategy for an Oracle Exadata Database Service on Dedicated Infrastructure deployment. Which TWO steps or configurations are required to establish an Active Data Guard standby database in a remote OCI region?

Hard
6

You are configuring disaster recovery for an Oracle Base Database system using Oracle Data Guard with Data Guard Broker. You need to perform a role transition where the primary database becomes the standby and the standby becomes the primary with zero data loss. Which Data Guard Broker command should you execute?

Medium
7

Which TWO actions are required when migrating an on-premises Oracle database to an Oracle Autonomous Database (Serverless) using Oracle Data Pump? (Choose two.)

Medium
8

When designing a multi-database architecture with Oracle GoldenGate for high availability and load distribution, which THREE architectural considerations are critical for success? (Choose three.)

Hard
9

An architect is configuring disaster recovery for an Autonomous Database (Serverless) instance using Autonomous Data Guard. The primary database resides in the US East (Ashburn) region, and the standby is in US West (Phoenix). What is the behavior of the standby database regarding read operations?

Hard
10

Which TWO methods can be used to securely connect an application running in an OCI compute instance to an Autonomous Database instance with private endpoint access enabled? (Choose two.)

Medium
11

You are designing a high availability disaster recovery architecture for an Oracle Base Database Service system deployed on a 2-node Virtual Machine DB System. You need to configure automated backups. Which storage destination is automatically used by OCI to store these automated backups?

Medium
12

You are optimizing the cost and performance of an Exadata Database Service on Dedicated Infrastructure environment hosting multiple large databases. Which THREE practices should you implement to achieve optimal resource utilization and cost efficiency?

Hard
13

Which THREE strategies are recommended when planning a large-scale database migration (exceeding 100 TB) from on-premises to Exadata Database Service on Dedicated Infrastructure with minimal downtime? (Choose three.)

Hard
14

You are configuring scaling parameters for an Autonomous Database on Dedicated Infrastructure. You need to enable automatic scaling of CPU cores to handle unpredictable traffic bursts while maintaining strict cost controls. What is the maximum CPU core auto-scaling limit for an Autonomous Container Database on Dedicated Infrastructure?

Hard
15

You are planning to migrate an Oracle Database to OCI using Zero Downtime Migration (ZDM). Which underlying Oracle migration technology does ZDM orchestrate behind the scenes for large databases requiring physical migration?

Medium
16

You are designing an automated backup strategy for an Exadata Database Service on Dedicated Infrastructure. You want to ensure that incremental backups are taken daily and full backups weekly, with long-term retention stored in OCI Object Storage. Where are these backup schedules configured?

Medium
17

Which Autonomous Database workload type is specifically optimized for running complex analytical queries, machine learning, and data warehousing workloads?

Easy
18

Which TWO factors should an architect consider when sizing an Exadata Database Service on Dedicated Infrastructure? (Choose three/two - Choose two.)

Medium
19

Which TWO workload types are natively supported when provisioning an Oracle Autonomous Database in OCI? (Choose two.)

Easy
20

Which OCI database service provides fully managed Oracle Database instances running on dedicated virtual machines with root access and granular control over operating system parameters?

Easy
21

Which OCI tool should a cloud architect recommend for automating the lifecycle management, patching, and backing up of a fleet of Oracle Base Database systems across multiple compartments?

Easy
22

You are migrating an Oracle Database to an Exadata Database Service on Dedicated Infrastructure. You need to ensure that database backups are stored securely with zero public internet exposure. What is the recommended networking architecture for backup transmission?

Medium
23

You are designing a high-availability architecture for an Oracle Base Database system across two Availability Domains (ADs) within a single OCI region. Which multi-database HA pattern ensures automatic failover with minimal data loss?

Medium
24

You are configuring Oracle Data Guard between an Exadata Database Service on Dedicated Infrastructure primary database and a remote standby database in another OCI region. To ensure maximum performance with zero data loss risk under normal operations, which Data Guard protection mode and transport setting should you configure?

Hard
25

Which TWO backup destinations are natively supported when configuring automated backups for Oracle Base Database systems on OCI? (Choose two.)

Easy
26

An enterprise is implementing a multi-database architecture utilizing Oracle GoldenGate microservices on OCI Compute instances to replicate data between an operational Exadata database and an analytical Autonomous Data Warehouse. Which network security construct must be configured to allow communication between the GoldenGate deployment and the Autonomous Database instance?

Hard
27

An enterprise application running on Exadata Database Service on Dedicated Infrastructure experiences severe I/O contention due to a noisy neighbor batch reporting job. Which Exadata storage feature should you configure to isolate and guarantee I/O resources for critical online transaction processing (OLTP) workloads?

Hard
28

Which THREE features are unique or heavily enhanced capabilities of Oracle Exadata Database Service on Dedicated Infrastructure compared to standard OCI Base Database systems? (Choose three.)

Hard
29

When planning a migration of Oracle databases to Oracle Autonomous Database (Serverless), which THREE migration methods or tools are natively supported or recommended by Oracle?

Medium
30

Which TWO tools or interfaces can administrators use to manage Oracle Autonomous Database instances in OCI? (Choose two.)

Easy
31

You are planning to migrate a large, mission-critical Oracle Database (12.1.0.2) on-premises to Exadata Database Service on Dedicated Infrastructure in OCI. The migration requires minimal downtime and must handle cross-endian platform conversion since the source is IBM AIX. Which migration tool and strategy combination is most appropriate?

Hard
32

What is the primary benefit of using OCI Autonomous Database Serverless compared to Provisioned (Dedicated) infrastructure regarding database administration?

Easy
33

Which TWO network security features can be applied to an Oracle Base Database system on OCI to protect database traffic and restrict access? (Choose two.)

Medium
34

Which TWO editions of Oracle Database are available when deploying an Oracle Base Database system on OCI? (Choose two.)

Easy
35

Your development team needs to scale up CPU cores for an Autonomous JSON Database instance dynamically without restarting the application or causing downtime. Which feature should you use?

Easy
36

An organization is designing a disaster recovery strategy using Exadata Database Service on Dedicated Infrastructure. They require an Recovery Time Objective (RTO) of less than 30 seconds and a Recovery Point Objective (RPO) of zero for an enterprise database handling mission-critical workloads. Which Data Guard configuration should be implemented?

Hard
37

An architect is designing an Oracle Autonomous JSON Database instance to store flexible document workloads. Which feature is automatically enabled on Autonomous JSON Database that distinguishes it from general-purpose Autonomous Transaction Processing instances regarding storage management?

Medium
38

An enterprise application running on Oracle Autonomous Transaction Processing (ATP) requires dedicated infrastructure isolation for compliance reasons. You need to provision an Autonomous Database on Dedicated Exadata Infrastructure. Which architectural step is mandatory before you can provision the database instance?

Medium
39

When designing a high-availability and disaster recovery architecture for an enterprise Oracle Database on OCI, which THREE components or patterns are crucial for achieving optimal recovery and uptime? (Choose three.)

Hard
40

You need to migrate a 50 TB Oracle Database from on-premises to Exadata Database Service on Dedicated Infrastructure with minimal downtime. The source database is operating on AIX and uses big-endian architecture, while OCI Exadata runs on little-endian Linux. Which migration method handles cross-platform endian conversion most efficiently?

Easy
41

You are provisioning an Autonomous Data Warehouse (ADW) instance and want to configure network access so that only specific corporate IP addresses can connect to the database. Which feature should you enable?

Easy
42

You are configuring transparent data encryption (TDE) for an Oracle Database on Exadata Database Service using OCI Vault for master encryption key management. What happens if the database loses connectivity to the OCI Vault key management service?

Hard
43

Your development team wants to connect securely to an Autonomous Database (Serverless) instance using mutual TLS (mTLS) authentication. Where must the client application obtain the required credentials to establish this secure connection?

Medium
44

What is the primary purpose of OCI Database Actions (SQL Developer Web) when working with an Oracle Autonomous Database?

Easy
45

You are designing a multi-database architecture where applications require read-scaling across different geographic regions with minimal replication lag. You decide to deploy Autonomous Data Warehouse (ADW) instances across three regions connected via GoldenGate. Which feature of Autonomous Database can be leveraged alongside GoldenGate to prevent sequence cache duplication conflicts across regions?

Hard
46

When creating an Oracle Base Database system, which database edition options are available for licensing on OCI?

Easy
47

You need to migrate an on-premises Oracle Database to OCI Exadata Database Service using Oracle GoldenGate for zero-downtime migration with bi-directional replication. Which critical design consideration must be addressed regarding table design on both databases?

Medium
48

An architect is designing an Oracle Exadata Database Service on Dedicated Infrastructure deployment with multiple VM clusters on a single Exadata rack. Which architectural feature allows secure isolation of CPU, memory, and database workloads between these distinct VM clusters?

Hard
49

You are migrating an on-premises Oracle Database (version 19c) to Oracle Autonomous Database (Serverless) using Oracle Data Pump. Which action is mandatory to ensure compatibility before generating the Data Pump export dump file?

Medium
50

An enterprise requires deploying an Oracle Autonomous Database on Dedicated Infrastructure to meet stringent data isolation and security mandates. Which foundational resource must be provisioned first before creating the Autonomous Container Database?

Easy
51

Your organization runs a multi-tenant Oracle Base Database Service and you need to monitor the storage utilization of individual Pluggable Databases (PDBs) within a Container Database (CDB). Which OCI native service and metric should you review?

Medium
52

An enterprise application uses an Oracle Autonomous Transaction Processing database and encounters intermittent application-level timeouts during peak concurrency spikes. Upon investigating, you notice that queued statements are waiting due to resource limits. Which Autonomous Database feature should you adjust to manage concurrency and statement queuing behavior?

Hard

Frequently asked questions

What does the Databases domain cover on the 1Z0-997-26 exam?
Databases questions test whether you can apply the concept in context, not just recognise a definition.
How many questions are in this domain?
This page lists all 52 Databases questions in the 1Z0-997-26 question bank. The actual exam draws from this domain proportionally to its weighting in the official exam blueprint.
What is the best way to practise this domain?
Start with a short focused session (10 questions) to identify gaps, then work through explanations. Repeat with a longer session once the weak areas feel solid.
Can I practise only Databases questions?
Yes — the session launcher on this page filters questions to this domain only. Choose any session length for inline explanations and scoring.
oracle-oci-architect-pro ORACLE-OCI-ARCHITECT-PRO databases Practice Questions