1Z0-997-26 Workload Migration — Timed 10 Questions

Question 1

An architect is planning the migration of a large enterprise application repository stored in an on-premises NFS filer to OCI. The application requires POSIX-compliant shared file storage accessible by multiple compute instances simultaneously across different availability domains. Which OCI storage service should be deployed?

10 minute time limit — choose an answer to begin.

Accepted Answer

OCI File Storage Service (FSS). OCI File Storage Service (FSS) is the only OCI storage offering that provides POSIX-compliant, NFSv3 shared file systems that can be mounted concurrently by multiple compute instances, including instances in different availability domains within the same region. It is purpose-built for exactly this shared-filer migration scenario. Object and Archive Storage are HTTP-based object stores without POSIX semantics, and Block Volume is single-instance attached storage.

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OCI Archive Storage

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OCI Object Storage standard tier

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OCI Block Volume service

Question 2

You are migrating a mission-critical multi-tier application from an on-premises data center to OCI. During the migration assessment phase, you identify that the application relies heavily on low-latency network communication (< 1ms round trip time) between the web tier and database tier. Which OCI architectural feature should you implement to satisfy this latency requirement?

Accepted Answer

Utilize OCI Compute Placement Groups with a 'Cluster' strategy or deploy instances within the same Fault Domain with a strict locality policy.. OCI Compute Placement Groups with the 'Cluster' strategy place instances physically close within a single Availability Domain, minimizing network latency (often sub-millisecond) between them. Deploying the web and database tiers in the same fault domain with a strict locality policy further reduces hops. This is the correct architectural choice for <1ms RTT requirements.

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Use OCI Local Peering Gateways (LPGs) to connect different Virtual Cloud Networks (VCNs) containing the tiers.

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Deploy the instances across different Availability Domains within the same OCI region.

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Utilize OCI Compute Placement Groups with a 'Spread' strategy.

Question 3

Your company is executing a lift-and-shift migration of 50 physical servers running Red Hat Enterprise Linux (RHEL) to OCI. You want to ensure that the operating systems remain supported, patched, and entitled to Oracle Linux Premier Support without having to rebuild the servers. What conversion utility should you use?

Accepted Answer

Oracle Linux Upgrade and Conversion tool (using the `leapp` utility and Oracle Linux yum repositories). The Oracle Linux Upgrade and Conversion tool leverages the `leapp` utility to perform an in-place conversion of RHEL systems to Oracle Linux without rebuilding. It replaces Red Hat subscription packages with Oracle Linux equivalents and reconfigures yum repositories to point to Oracle's public yum servers, thereby granting access to Oracle Linux Premier Support. This is the only option that directly addresses OS-level conversion and entitlement for RHEL-to-Oracle Linux migrations on OCI.

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VMware HCX OS conversion engine

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OCI Database Migration service

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OCI Instance Export/Import wizard

Question 4

Your team is executing a cutover plan for migrating a production Microsoft SQL Server database from an on-premises environment to OCI Compute running Windows Server. To ensure data integrity, you decide to use Always On Availability Groups with the on-premises primary and the OCI replica. After completing the initial seed and syncing the databases, you perform the failover. However, application servers in OCI cannot connect to the new primary database. What is the most likely root cause?

Accepted Answer

OCI VCN Security Lists or Network Security Groups block TCP port 1433 or the Availability Group listener port between the application tier subnet and the database subnet.. After a successful Always On Availability Group failover, the new primary replica listens on TCP port 1433 (default SQL Server port) and on the Availability Group listener port (default 1433 or a custom port). If application servers in OCI cannot connect, the most likely cause is that OCI VCN Security Lists or Network Security Groups are blocking traffic on those ports between the application subnet and the database subnet. Unlike on-premises environments where firewall rules may already be open, OCI's virtual cloud network enforces default-deny ingress, so explicit rules are required to allow SQL traffic.

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SQL Server Enterprise Edition requires an active Azure ExpressRoute connection to validate cluster heartbeat packets.

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OCI Compute instances running Windows do not support Windows Server Failover Clustering (WSFC).

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OCI block volumes do not support Microsoft NTFS file systems, causing the database files to corrupt upon failover.

Question 5

During a database migration assessment from an on-premises Oracle Database (version 11.2.0.4) to OCI Base Database Service running Oracle Database 19c, you discover that the legacy database uses deprecated initialization parameters and character sets that are incompatible with 19c. How should you address this migration blocker?

Accepted Answer

Run the Pre-Upgrade Information Tool (utlu19i.sql) on the source database, remediate reported issues, upgrade the database binaries locally, and then migrate using Oracle Data Pump or RMAN.. Oracle's supported upgrade path from 11.2.0.4 to 19c requires running the Pre-Upgrade Information Tool (utlu19i.sql) to identify deprecated parameters, invalid objects, and character set issues, remediating them, upgrading the binaries, and then migrating via Data Pump or RMAN transportable techniques. This addresses the blocker at its root rather than trying to bypass version incompatibilities.

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Perform a direct binary block-level copy of the 11.2.0.4 datafiles to OCI and start the 19c instance using the old parameter file.

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Migrate the database to an OCI Autonomous Database directly, as Autonomous Database automatically converts any legacy version and character set on the fly.

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Use OCI GoldenGate to stream the 11.2.0.4 data directly into a 19c target database without any schema adjustments.

Question 6

You are migrating an enterprise application that requires strict compliance and regulatory isolation. The application must run on dedicated physical hardware where no other customer's virtual instances can reside. Which OCI compute provisioning model should you choose?

Accepted Answer

OCI Dedicated VM Hosts. OCI Dedicated Virtual Host or Dedicated Compute Instances (Bare Metal or Dedicated VM Hosts) provide single-tenant hardware isolation where all VMs running on the host belong exclusively to a single tenant.

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OCI Standard Multi-Tenant Compute Instances with high-density shapes

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OCI Burstable Instances

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OCI Container Instances

Question 7

Your team is planning to migrate virtual machines from an on-premises hypervisor to OCI Compute. You want to generate an automated report detailing resource utilization (CPU, memory, storage IOPS) over the past 30 days to right-size the target OCI instance shapes. Which OCI tool supports this discovery phase?

Accepted Answer

OCI Migration Discovery and Assessment. OCI Migration Discovery and Assessment is the tool designed to discover on-premises workloads, collect utilization metrics such as CPU, memory, and storage IOPS over a period, and generate reports that help right-size target OCI shapes. It supports the discovery phase of a migration by providing automated inventory and performance data. This directly matches the requirement to generate an automated 30-day utilization report for right-sizing.

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OCI Cost Estimator

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OCI Logging Analytics

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OCI Database Migration Service

Question 8

You are executing a lift-and-shift migration of a multi-tier application where subnet IP addressing must remain identical to the on-premises environment due to hardcoded IP configurations in legacy software. How should you configure the OCI Virtual Cloud Network (VCN) to accommodate this requirement?

Accepted Answer

Configure the OCI VCN and subnets with the exact same CIDR block ranges as the on-premises network.. To preserve hardcoded on-premises IP addresses, the OCI VCN and its subnets must use the exact same CIDR ranges as the source network, so migrated VMs retain their addresses without reconfiguration. OCI allows any RFC 1918 (or even public) CIDR in a VCN as long as it does not overlap with other VCNs you intend to peer.

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Use OCI Flexible Load Balancers configured in Layer 2 bridging mode.

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Design the OCI VCN with disjoint RFC 1918 address space and use OCI NAT gateways to rewrite hardcoded IP addresses dynamically.

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Deploy an OCI API Gateway in front of each virtual machine to proxy internal IP traffic.

Question 9

When planning a workload migration to OCI, what are TWO primary benefits of conducting a comprehensive discovery and assessment phase using tools like OCI Migration? (Choose two.)

Accepted Answer

Accurately right-sizing OCI compute and storage resources based on historical utilization metrics. Option A is correct because discovery and assessment tools such as OCI Migration collect historical CPU, memory, and storage utilization metrics from on-premises workloads, which lets you map each server to the most appropriate OCI compute shape and block volume size instead of guessing, avoiding both over-provisioning and performance shortfalls. Option E is correct because the same discovery process inventories installed software, network connections, and inter-server communication, revealing application dependencies so related servers can be grouped into logical migration waves and moved together without breaking multi-tier applications. Option B is not a migration-assessment capability; OCI Migration does not automatically translate COBOL into Python, which would require separate code-modernization tooling. Option C is a hardware-refresh activity unrelated to cloud migration planning, and Option D concerns on-premises facilities rather than any OCI discovery or assessment function.

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Automatically rewriting legacy COBOL source code into modern Python applications

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Physically replacing hard drives in on-premises servers before shipping them

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Instantly upgrading on-premises cooling systems without cloud involvement

Question 10

Your enterprise is migrating several mission-critical applications to OCI and requires high availability and disaster recovery across multiple regions. Which THREE OCI architectural components should you configure to meet these requirements? (Choose three.)

Accepted Answer

Cross-region Database Data Guard or OCI GoldenGate replication. Option B is correct because Oracle Data Guard (for Autonomous Database/DB systems) and OCI GoldenGate provide asynchronous cross-region replication of database data, which is the foundation of a multi-region DR strategy with defined RPO/RTO. Option C is correct because Object Storage buckets can be configured with cross-region replication (or the newer replication policies) to automatically copy objects to a bucket in another region, protecting unstructured data and backups against regional failure. Option E is correct because a Dynamic Routing Gateway (DRG) attached to each VCN, joined by Remote Peering Connections (RPCs) over the OCI backbone, provides private, low-latency, encrypted connectivity between VCNs in different regions — essential for cross-region application tiers and replication traffic. Option A is not valid: a Block Volume is a zonal resource that can only be attached to instances in the same availability domain, and it cannot be simultaneously attached across two regions over iSCSI. Option D is not valid: hairpinning all regional traffic through a single legacy on-premises firewall in a third country introduces a single point of failure, adds latency, and defeats the purpose of multi-region high availability and DR.

Answer

Attaching a single Block Volume across two distinct OCI regions simultaneously over standard iSCSI

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Routing all regional traffic through a single legacy on-premises firewall in a third country