1Z0-997-26 Workload Migration — 25 Questions

Question 1

When planning a lift-and-shift migration of virtual machines from an on-premises VMware environment to OCI Compute, which THREE key readiness assessments must be performed prior to migration? (Choose three.)

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Analyze CPU and memory utilization metrics to select appropriate OCI Compute shapes.. Successful VM migrations require verifying operating system compatibility, ensuring network/subnet mapping and firewall rules are aligned, and verifying that resource sizing (CPU/RAM) maps to available OCI VM shapes.

Answer

Convert all block storage volumes directly into OCI Autonomous Database instances.

Question 2

You are leading a multi-cloud migration project where 200 virtual machines from an on-premises data center are being assessed for migration to OCI. You have deployed the OCI Migration discovery agent, but some Linux VMs are failing inventory collection due to SSH authentication failures and lack of root privileges. How should you resolve this issue without compromising security?

Accepted Answer

Create a dedicated migration user account on each Linux VM, grant passwordless sudo access for the specific discovery commands, and distribute the OCI Migration SSH key pair to that user.. OCI Migration requires a secure SSH connection with appropriate permissions (sudo/privilege escalation) to execute discovery commands. You must provision an authorized SSH key on the target VMs and configure a sudoers file allowing the OCI Migration agent service account to run necessary inventory scripts.

Answer

Grant root access directly to the default 'opc' user across all on-premises enterprise Linux servers via group policy objects.

Answer

Disable password authentication globally on all target VMs and configure the OCI Migration appliance with the root password in plain text.

Answer

Switch the OCI Migration discovery mechanism from agent-based SSH to agentless SNMPv1 polling across the internal firewall.

Question 3

Your organization is migrating a 3-tier web application running on VMware vSphere to OCI Compute. The application requires exact operating system configurations, strict security policies, and custom kernel modules. You want to automate the migration process while maintaining network consistency. Which migration approach is most suitable?

Accepted Answer

Migrate the workloads to Oracle Cloud VMware Solution (OCVS) using VMware HCX for seamless live migration without altering the hypervisor layer or guest OS configurations.. OCI Compute and OCI Migration tools support lifting and shifting complex VMware environments by using VMware HCX on Oracle Cloud VMware Solution (OCVS) or importing custom images, but for strict OS configurations and automation, OCI Migration with agent-based discovery or OCVS is ideal. OCVS provides native VMware compatibility.

Answer

Deploy new bare metal instances in OCI and use rsync to copy the root file systems over a secure IPsec VPN tunnel.

Answer

Rebuild the application from scratch using Terraform and OCI Resource Manager, then redeploy application binaries.

Answer

Export each virtual machine as a VMDK file, upload it to OCI Object Storage, and import it as a generic OCI custom image using the CLI.

Question 4

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?

Accepted Answer

OCI File Storage Service (FSS). OCI File Storage Service (FSS) provides a durable, scalable, enterprise-grade, network file system that supports the Network File System version 3.0 (NFSv3) protocol and POSIX-compliant locking, accessible across multiple Availability Domains.

Answer

OCI Archive Storage

Answer

OCI Object Storage standard tier

Answer

OCI Block Volume service

Question 5

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 Instances can be grouped into Compute Clusters (using Cluster Networks for HPC or Placement Groups for low latency) to ensure instances are physically close to each other within the data center, minimizing network latency.

Answer

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

Answer

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

Answer

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

Question 6

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). OCI provides the 'Canonical' or 'OS Management Hub' tools, and specifically the 'Linux Migration' utility or 'Leapp' framework supported by Oracle to convert RHEL or CentOS instances running in OCI to Oracle Linux in-place, retaining binary compatibility and gaining Oracle support.

Answer

VMware HCX OS conversion engine

Answer

OCI Database Migration service

Answer

OCI Instance Export/Import wizard

Question 7

An enterprise is planning to migrate a large on-premises Oracle Database of 15 TB to Oracle Cloud Infrastructure (OCI) Exadata Database Service. The maintenance window for the final cutover is extremely short (less than 2 hours). Which migration method should you recommend to minimize application downtime?

Accepted Answer

Set up an Oracle Data Guard standby database in OCI from an on-premises primary database using RMAN duplication over FastConnect, then perform a switchover during the maintenance window.. Oracle Data Guard or GoldenGate combined with transportable tablespaces or RMAN cross-platform incremental backup provides the lowest downtime for large databases by synchronizing data in the background and performing a quick final cutover.

Answer

Use Oracle Database Actions to export all schemas to a local staging server and import them into the new database.

Answer

Migrate the database using OCI Database Migration service with a standard full database backup without incremental backups.

Answer

Perform a cold backup on-premises, upload it to OCI Object Storage, and restore it using RMAN during the maintenance window.

Question 8

An administrator needs to transfer 80 TB of unstructured file backup data from an on-premises Network Attached Storage (NAS) device to OCI Object Storage. The available internet bandwidth is only 50 Mbps, which would take months to upload. Which OCI service should be utilized to complete this physical migration efficiently?

Accepted Answer

OCI Data Transfer Service using physical Data Transfer Appliances.. Data Transfer Appliance or Data Transfer Disk is designed for large-scale offline data migration where network bandwidth is insufficient to transfer data within a reasonable timeframe.

Answer

OCI FastConnect with a dedicated 1 Gbps partner circuit.

Answer

OCI Storage Gateway deployed on an edge server compressing and streaming over the 50 Mbps line.

Answer

Parallelized multi-part uploads using the OCI CLI over public internet connections.

Question 9

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.. When failing over an Always On Availability Group in a cloud environment like OCI, the listener requires specific network configurations such as an Internal Load Balancer or floating IP configuration, and VCN security lists or Windows Firewall rules must allow traffic on port 1433 and listener ports.

Answer

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

Answer

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

Answer

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

Question 10

You are migrating a custom web application from an on-premises Linux server to OCI Compute. The application is packaged as a standard Docker container. Your management wants to avoid managing underlying operating systems, kernel patching, and VM scaling. Which OCI service should you select for this containerized workload migration?

Accepted Answer

OCI Container Instances. OCI Container Instances is a serverless compute service that enables users to run containers directly on OCI without managing underlying virtual machines or servers, perfect for simple containerized deployments without Kubernetes overhead.

Answer

OCI Functions

Answer

Oracle Container Engine for Kubernetes (OKE)

Answer

OCI Compute Standard virtual machine instances

Question 11

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.. Upgrading across multiple major versions (11.2 to 19c) requires reviewing upgrade paths, deprecations, and character set conversions. Oracle Data Pump or transportable methods along with the Database Upgrade Assistant (DBUA) or Pre-Upgrade Information Tool must be run on the source database to identify and remediate incompatibilities before migration.

Answer

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.

Answer

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

Answer

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

Question 12

Your organization is designing a disaster recovery strategy as part of a workload migration project to OCI. The business requirement states that in the event of a regional outage in OCI region A, workloads must fail over to OCI region B with a Recovery Point Objective (RPO) of zero and a Recovery Time Objective (RTO) of less than 15 minutes. Which OCI networking feature should you deploy to interconnect the two regions for database replication?

Accepted Answer

OCI Dynamic Routing Gateway (DRG) with Remote Peering Connection (RPC). To connect VCNs across different OCI regions with low latency and high security for database replication (such as Data Guard), you should use OCI Remote Peering across Local Peering Gateways or Remote Peering Connections (RPC) through Dynamic Routing Gateways (DRGs).

Answer

OCI Local Peering Gateway (LPG)

Answer

OCI Service Gateway

Answer

OCI Internet Gateway with IPsec VPN tunnels over the public internet

Question 13

Your company is migrating a large PostgreSQL database from AWS RDS to OCI Database with PostgreSQL. The database is 4 TB in size, and write operations continue 24/7. To ensure zero data loss and minimal downtime during cutover, which migration strategy should you employ?

Accepted Answer

Configure PostgreSQL logical replication (or use OCI GoldenGate / DMS equivalents) to stream ongoing transaction logs after performing an initial consistent dump and restore.. For heterogenous or cloud-to-cloud PostgreSQL migrations with ongoing writes, logical replication (using tools like AWS DMS or native PostgreSQL logical decoding with pg_logical / OCI GoldenGate) allows initial data snapshot loading followed by continuous change data capture (CDC).

Answer

Establish AWS Direct Connect to OCI FastConnect and mount an AWS EBS volume directly to an OCI VM running PostgreSQL.

Answer

Take an AWS RDS snapshot, download the snapshot files via AWS CLI, and restore them onto an OCI Compute instance running PostgreSQL.

Answer

Stop the application writes, take a pg_dump file, transfer it via SCP, and restore it into OCI during a scheduled 12-hour outage window.

Question 14

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.

Answer

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

Answer

OCI Burstable Instances

Answer

OCI Container Instances

Question 15

Your engineering team is troubleshooting an issue where migrated Linux virtual machines in OCI are experiencing severe disk I/O performance bottlenecks. The instances were migrated using raw block-level cloning from on-premises SAN storage. The volumes in OCI are provisioned as Lower Cost (Balanced) block volumes. What action should you take to resolve the performance bottleneck while maintaining data integrity?

Accepted Answer

Modify the OCI block volume performance tier or increase the assigned Volume Performance Units (VPUs) per GB.. OCI Block Volume service offers different performance tiers: Balanced, Higher Performance, and Ultra High Performance, alongside customizable VPU (Volume Performance Units) scaling. Upgrading the VPUs or switching the volume performance tier directly increases IOPS and throughput without requiring data re-migration.

Answer

Format the attached block volumes with ext3 file systems instead of ext4.

Answer

Recreate the virtual machines using denser AMD compute shapes with local NVMe storage.

Answer

Attach an OCI File Storage Service (FSS) mount target as the primary root volume.

Question 16

During a lift-and-shift migration planning phase, your team needs to estimate the monthly running costs of various OCI Compute shapes, block storage volumes, and egress data transfer fees before provisioning resources. Which OCI tool should you use to generate this detailed cost breakdown?

Accepted Answer

OCI Cost Estimator. The OCI Cost Estimator (cloud.oracle.com/cost-estimator) allows architects and administrators to calculate and plan estimated monthly expenditures across all OCI services based on specific configurations and regions.

Answer

OCI Budgets and Alerts

Answer

OCI Resource Manager

Answer

OCI Migration Asset Inventory dashboard

Question 17

An organization is preparing to migrate 500 virtual machines to OCI. To govern resource creation, budget allocation, and access control effectively, how should the OCI tenancy be structured prior to starting resource migrations?

Accepted Answer

Create a structured hierarchy of compartments (e.g., Prod, Non-Prod, Networking) beneath the root tenancy and apply least-privilege IAM policies to each compartment.. A well-architected OCI tenancy uses a multi-compartment hierarchy aligned with business units, project environments (prod/non-prod), and security zones, governed by IAM policies and OCI Tagging.

Answer

Deploy all migrated virtual machines into the tenancy root compartment with a single administrator policy.

Answer

Create a separate OCI tenancy for every single virtual machine being migrated.

Answer

Rely entirely on tags without creating compartments or IAM policies.

Question 18

Your organization has completed migrating a database to OCI Base Database Service. To ensure compliance with corporate data protection policies, you must verify that all database backups stored in OCI Object Storage are automatically encrypted using customer-managed encryption keys. Where should you configure this key management integration?

Accepted Answer

OCI Vault service (Key Management). OCI Vault service allows customers to create and manage master encryption keys. Both database backups and block volumes can be encrypted using keys stored in OCI Vault (KMS).

Answer

OCI Database Migration service connection profiles

Answer

OCI Audit log configuration

Answer

OCI Identity and Access Management (IAM) password policies

Question 19

An enterprise is migrating a legacy Java application that requires sticky sessions and complex path-based routing rules to OCI. The migration plan requires zero dropped connections during backend server updates. Which OCI Load Balancer configuration feature should you implement?

Accepted Answer

Configure backend server draining with a specified timeout period in the backend set.. OCI Load Balancer supports backend set draining (draining timeout), which allows existing established connections to complete gracefully while new connections are routed to updated backend servers.

Answer

Enable IP Hash load balancing policy without health checks.

Answer

Use OCI Web Application Firewall (WAF) rate limiting rules to drop incoming traffic during maintenance.

Answer

Configure a Layer 4 TCP Network Load Balancer with TCP session persistence disabled.

Question 20

You are migrating a multi-tier web application to OCI. The web tier consists of Apache HTTP servers that need to be auto-scaled based on CPU utilization. Which combination of OCI services should you configure to achieve automated horizontal scaling?

Accepted Answer

OCI Instance Pools and OCI Auto-Scaling Configurations. OCI Compute Auto-Scaling configurations integrated with Instance Pools allow you to automatically provision or terminate compute instances based on metrics such as CPU or memory utilization, sitting behind an OCI Load Balancer.

Answer

OCI Resource Manager and Terraform apply schedules

Answer

OCI Events Service and OCI Notifications triggered by Object Storage uploads

Answer

OCI Cloud Guard and OCI Vulnerability Scanning