1Z0-997-26 Workload Migration — Timed 10 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.)

10 minute time limit — choose an answer to begin.

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