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OCI Migration Architect practice questions

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Question 1Migration Architecture and Assessment

In an OCI migration assessment, which artifact is the primary source for discovering on-premises server inventory, installed software, and utilization trends before sizing target shapes?

  1. A network topology diagram drawn by the operations team
  2. A list of application owners compiled by the PMO
  3. A discovery tool or agent that collects configuration and performance metrics over a representative period Correct answer.
  4. A signed bill of materials from the hardware vendor

Explanation

Migration sizing depends on measured CPU, memory, disk, and network utilization captured over a representative window, typically at least a few weeks, so that peak and steady-state profiles are visible. Configuration and installed-software inventory from the same discovery source feeds dependency mapping and target shape selection. Static documents such as diagrams or owner lists are useful context but do not provide quantitative sizing data.

Question 2Migration Architecture and Assessment

During assessment you find an application server running at 8 percent average CPU but 95 percent memory utilization with heavy swap. Which target OCI shape strategy best reflects that profile?

  1. Select the smallest burstable shape available in the region
  2. Select a GPU shape to accelerate the swapping behavior
  3. Select a compute-optimized shape with more OCPUs to absorb the load
  4. Select a memory-optimized shape and validate with a pilot before committing Correct answer.

Explanation

Sustained high memory utilization with swapping indicates the workload is memory-bound, so a memory-optimized shape matches the resource profile. Adding OCPUs does not relieve memory pressure and may increase cost without benefit. A pilot migration confirms the sizing assumption before the full cutover.

Question 3Migration Architecture and Assessment

Which OCI capability should an architect use to map communication flows between on-premises applications so that migration waves preserve required dependencies?

  1. Budget alerts configured on the tenancy
  2. VNIC flow logs and network traffic analysis correlated with application inventory Correct answer.
  3. Object Storage lifecycle policies
  4. IAM policy evaluation logs

Explanation

Dependency mapping requires observed network conversations between hosts, which flow logs and traffic analysis provide, then correlated against the application inventory to form affinity groups. IAM logs, storage lifecycle rules, and budget alerts describe governance and cost, not inter-application communication. The resulting dependency graph determines wave sequencing and shared landing-zone design.

Question 4Migration Architecture and Assessment

An assessment shows a legacy application with a hard dependency on a kernel module unavailable in the OCI compute image catalog. Which migration strategy decision is most appropriate at the assessment stage?

  1. Flag the workload for re-platforming or re-architecting and scope the effort before wave assignment Correct answer.
  2. Assume the module will be rebuilt by the OS vendor during cutover
  3. Exclude it from the migration program entirely
  4. Assign it to the first rehost wave to save assessment time

Explanation

Compatibility blockers identified during assessment must drive a strategy decision, and a missing kernel dependency means lift-and-shift is not viable as-is. Re-platforming or re-architecting carries effort and risk that should be estimated before the workload is placed in a wave. Deferring the issue to cutover or dropping the workload are not credible architecture decisions.

Question 5Migration Architecture and Assessment

Which metric set is most relevant when estimating the network egress and transfer time for a large database migration into OCI?

  1. Database size, daily change rate, available bandwidth, and acceptable downtime window Correct answer.
  2. Count of application users and their geographic distribution
  3. Number of backup tapes retained at the offsite vault
  4. Number of database schemas and count of stored procedures

Explanation

Transfer time is driven by total data volume and bandwidth, while the cutover approach depends on how much data changes during the transfer and how long an outage is tolerated. Those four factors determine whether online replication, offline transfer appliances, or a hybrid approach is appropriate. Schema counts and user geography affect application design but not transfer feasibility directly.

Question 6Migration Architecture and Assessment

A business unit reports that an application must remain available during migration with no more than five minutes of downtime. Which assessment conclusion follows?

  1. The workload should be deferred indefinitely because zero downtime is impossible
  2. The workload should be rehosted without any change to its data layer
  3. The workload requires a replication-based approach with a rehearsed cutover rather than an offline export and import Correct answer.
  4. The workload can be migrated with a standard maintenance window of several hours

Explanation

A five-minute tolerance rules out offline dump-and-restore for any sizable data set and points to continuous replication plus a scripted, rehearsed cutover. The downtime figure becomes a design constraint that shapes tooling choice and runbook detail. Deferring the workload is not a valid conclusion when viable techniques exist.

Question 7Migration Architecture and Assessment

In OCI, which construct is used to organize resources, isolate them, and apply quotas and budgets per business unit during a large migration?

  1. Tags applied to compute instances
  2. Compartments within the tenancy Correct answer.
  3. Security lists attached to a VCN
  4. Fault domains within an availability domain

Explanation

Compartments are the fundamental OCI grouping mechanism for access control, quota policies, and cost tracking, making them the natural boundary for business-unit separation. Fault domains and security lists are availability and network constructs, and tags are metadata rather than isolation boundaries. A well-designed compartment hierarchy is therefore a core assessment deliverable.

Question 8Migration Architecture and Assessment

An assessment team needs to estimate the cost of running a workload in OCI with variable demand that has predictable daytime peaks. Which cost modeling approach is most defensible?

  1. Model all capacity as always-on at peak size to guarantee performance
  2. Model cost using only the current on-premises hardware depreciation schedule
  3. Model all capacity as on-demand with no reserved commitment and no autoscaling
  4. Model a baseline of always-on capacity plus autoscaling for peak periods, using measured utilization percentiles Correct answer.

Explanation

Cloud cost modeling should reflect actual demand shape: a committed baseline for steady load plus elastic capacity for peaks usually minimizes spend while meeting performance. Sizing everything for peak overprovisions and inflates cost, while ignoring commitments forfeits discount options. On-premises depreciation is not a valid proxy for OCI pricing.

Question 9Migration Architecture and Assessment

Which finding during assessment most strongly indicates that an application should be re-architected rather than rehosted?

  1. The application uses a supported operating system release
  2. The application uses standard TCP ports for client access
  3. The application relies on shared local filesystem state across multiple nodes that cannot be replicated consistently Correct answer.
  4. The application has a documented installation runbook

Explanation

Shared mutable filesystem state across nodes is a classic blocker for straightforward rehosting because block volumes attach to a single instance and distributed consistency must be designed. Supported operating systems, runbooks, and standard ports all ease migration and support a rehost decision. The architectural change is justified when the state model itself must be redesigned.

Question 10Migration Architecture and Assessment

When grouping applications into migration waves, which principle best balances risk and throughput?

  1. Group by shared dependencies and business criticality, starting with low-risk, well-understood workloads Correct answer.
  2. Group by the physical rack location of the current servers
  3. Group strictly by alphabetical order of application name for predictability
  4. Group all tier-one systems into the first wave to retire risk early

Explanation

Waves should follow dependency clusters so that related systems move together, and should sequence lower-risk workloads first to build team confidence and refine the runbook. Criticality influences ordering but pushing all tier-one systems first concentrates risk before the process is proven. Arbitrary ordering criteria ignore technical dependencies.

Question 11Migration Architecture and Assessment

Which OCI service is most appropriate for continuously replicating an on-premises Oracle database to OCI with minimal downtime during cutover?

  1. Oracle Cloud Infrastructure GoldenGate Correct answer.
  2. OCI File Storage snapshots
  3. OCI DNS zone transfers
  4. OCI Object Storage replication policies

Explanation

GoldenGate provides logical replication that keeps source and target synchronized so cutover requires only a brief pause to drain changes. Object Storage replication, file snapshots, and DNS transfers address different data types and cannot replicate database transactions. This makes GoldenGate the standard choice for low-downtime database migration.

Question 12Migration Architecture and Assessment

An assessment reveals that an application's license agreement restricts running its database on third-party cloud infrastructure. What is the correct assessment outcome?

  1. Proceed with rehosting and resolve licensing after cutover
  2. Record the licensing constraint as a risk and evaluate alternatives such as bring-your-own-license or re-platforming before wave assignment Correct answer.
  3. Ignore the license because cloud migration supersedes vendor terms
  4. Cancel the entire migration program

Explanation

Licensing restrictions are a first-class assessment risk that can invalidate a technical plan, so they must be documented and resolved through options such as license mobility, BYOL, or re-platforming. Proceeding without resolution exposes the program to legal and financial exposure. Cancelling the whole program over one workload is disproportionate.

Question 13Migration Architecture and Assessment

Which output of the assessment phase most directly enables accurate landing-zone network design?

  1. A consolidated list of required ingress and egress flows, protocols, and peer endpoints Correct answer.
  2. A list of historical help-desk ticket categories
  3. A count of employee laptops by department
  4. A summary of the marketing brand guidelines

Explanation

Landing-zone network design needs the concrete traffic matrix: which systems must reach which endpoints on which protocols and ports. That drives subnet segmentation, security list and NSG rules, and connectivity choices such as FastConnect or site-to-site VPN. The other items are unrelated to network architecture.

Question 14Migration Architecture and Assessment

A workload's assessment shows it is stateless, containerized, and scales horizontally with unpredictable traffic. Which target platform decision aligns best with that profile?

  1. A single large bare metal instance sized for peak traffic
  2. OCI Container Engine for Kubernetes with cluster autoscaling Correct answer.
  3. A pair of fixed virtual machines behind a load balancer
  4. A dedicated Exadata quarter rack

Explanation

Stateless, horizontally scalable container workloads map naturally to managed Kubernetes with autoscaling, which matches capacity to unpredictable demand. Fixed instances sized for peak waste capacity, and bare metal or Exadata targets address different workload classes. The assessment profile should drive the platform choice rather than defaulting to like-for-like servers.

Question 15Migration Architecture and Assessment

Which assessment activity best validates that an application's performance will meet service levels after migration?

  1. A comparison of on-premises and cloud vendor marketing materials
  2. A pilot migration with representative load testing on candidate OCI shapes Correct answer.
  3. A review of the application's source code commit history
  4. An interview with the application's original author

Explanation

Performance validation requires measuring the application under realistic load on the actual candidate infrastructure, which a pilot with load testing provides. Source history, author interviews, and vendor collateral offer context but no empirical performance evidence. Pilot results also refine sizing assumptions before the full wave.

Question 16Migration Architecture and Assessment

An application depends on a hardware security module accessed over the network. During assessment, which action is most appropriate?

  1. Replace the HSM with local file-based key storage
  2. Identify an OCI equivalent such as Vault or a dedicated HSM offering and confirm latency and protocol compatibility Correct answer.
  3. Schedule the migration without addressing the dependency
  4. Assume the HSM dependency can be removed without analysis

Explanation

Hardware-backed key operations are a functional dependency that must be mapped to an equivalent service, and protocol and latency compatibility must be confirmed because cryptographic calls are often latency-sensitive. Removing or substituting weaker key storage changes the security posture and is not an architectural decision to make casually. Ignoring the dependency risks application failure at cutover.

Question 17Migration Architecture and Assessment

Which OCI feature allows an architect to enforce maximum compute and storage consumption per compartment during a phased migration?

  1. Network security groups
  2. IAM dynamic groups
  3. Service Connector Hub
  4. Quota policies applied at the compartment level Correct answer.

Explanation

Quota policies set limits on resource consumption within compartments, which prevents a migrating team from overprovisioning and blowing the budget. Dynamic groups grant permissions to instances, Service Connector Hub moves data between services, and NSGs filter traffic. Quotas are therefore the governance control for consumption limits.

Question 18Migration Architecture and Assessment

A legacy application writes to a database using a vendor-supplied driver that is only certified on an end-of-life operating system. What does this imply for the migration plan?

  1. The database should be migrated first and the driver issue resolved afterward
  2. The application should be containerized to avoid the driver problem
  3. The application can be rehosted unchanged because OCI supports many operating systems
  4. The OS upgrade and driver certification must be sequenced and validated before or alongside the migration Correct answer.

Explanation

An uncertified driver on an end-of-life OS is a coupled risk: both the platform and the data-access layer must be validated together, and sequencing matters because the application may not function if either changes alone. Rehosting unchanged perpetuates the end-of-life exposure. Containerizing does not remove a driver certification constraint.

Question 19Migration Architecture and Assessment

Which document produced during assessment communicates the agreed target state, migration approach, and risks to executive stakeholders?

  1. A packet capture of production traffic
  2. A migration assessment report with recommendations and a risk register Correct answer.
  3. A database schema dump
  4. An infrastructure-as-code template repository

Explanation

Executive decision-making requires a synthesized assessment report that states the recommended target architecture, the chosen migration strategies, estimated effort and cost, and a prioritized risk register. Packet captures, schema dumps, and code repositories are technical inputs to that report rather than communication artifacts for leadership.

Question 20Migration Architecture and Assessment

An application's assessment shows a 20 TB data set with a 2 TB daily change rate and a 100 Mbps available link. Which migration approach is most likely required?

  1. Manual export to removable media with no change capture
  2. Continuous replication only, with no baseline transfer
  3. An offline or appliance-based bulk transfer for the baseline followed by incremental replication Correct answer.
  4. A single online copy over the existing 100 Mbps link during a weekend window

Explanation

At 100 Mbps the baseline transfer would take many days, and a 2 TB daily change rate exceeds what that link can replicate continuously, so bulk physical transfer plus incremental catch-up is the practical design. A weekend online copy cannot move 20 TB at that bandwidth. Continuous replication alone cannot establish the baseline, and manual media without change capture loses updates.

Question 21Migration Architecture and Assessment

Which consideration most affects the choice between a single large region deployment and a multi-region architecture for a migrated workload?

  1. The required recovery time and recovery point objectives for regional failure Correct answer.
  2. The count of database indexes
  3. The number of developers on the application team
  4. The preferred programming language of the application

Explanation

Multi-region architecture is driven by resilience requirements: how quickly the service must recover and how much data loss is tolerable if a region fails. Team size, language choice, and index counts affect development and tuning but not geographic topology. The RTO and RPO targets therefore anchor the decision.

Question 22Migration Architecture and Assessment

During assessment, an architect finds that several applications share a central message broker that is out of support. What is the most sound recommendation?

  1. Treat the broker as a shared dependency and plan its replacement as a prerequisite or coordinated workstream Correct answer.
  2. Decommission the broker and rewrite all consumers simultaneously
  3. Migrate each application independently and let each bring its own broker
  4. Retain the unsupported broker indefinitely in OCI

Explanation

A shared messaging layer is a cross-cutting dependency, so its replacement must be coordinated across all consuming applications rather than handled per application. Independent brokers per application multiply operational overhead and fragment integration. Simultaneous rewrite of all consumers is high risk, and retaining unsupported software carries security and support exposure.

Question 23Migration Architecture and Assessment

Which OCI service provides a managed, highly available file system suitable for migrating an application that requires shared NFS storage across multiple compute instances?

  1. OCI Object Storage
  2. OCI Block Volume
  3. OCI File Storage Correct answer.
  4. OCI Local NVMe disks

Explanation

File Storage offers managed NFS that can be mounted by multiple instances concurrently, matching applications that require shared POSIX file access. Block volumes attach to a single instance, Object Storage is accessed via API rather than a mounted file system, and local NVMe is ephemeral and instance-bound. This makes File Storage the appropriate target for shared NFS requirements.

Question 24Migration Architecture and Assessment

An assessment identifies that a workload has strict data residency requirements mandating that data remain within a specific country. How should this shape the migration design?

  1. Store backups only in the home region of the migration team
  2. Select the lowest-cost region regardless of location
  3. Replicate data globally for maximum durability
  4. Constrain region selection and replication targets to approved geographies and document the control Correct answer.

Explanation

Data residency is a legal constraint that limits which regions and replication targets are permissible, so region selection and any cross-region replication must be restricted to approved geographies and the control documented for audit. Cost-optimized or globally distributed designs may violate the requirement. Backup placement must also comply, not follow team convenience.

Question 25Migration Architecture and Assessment

Which assessment technique best estimates the effort of converting a large estate of database objects to a target managed database service?

  1. Reviewing the vendor's feature list for the target service
  2. Automated schema and code scanning to classify objects by compatibility and required manual rework Correct answer.
  3. Counting the number of database instances only
  4. Interviewing one database administrator about overall impressions

Explanation

Conversion effort scales with the number and complexity of incompatible objects, so automated scanning that classifies each object and flags manual rework gives a defensible estimate. Instance counts alone miss object-level complexity. A single interview or vendor feature list provides context but no quantified basis for effort.

Question 26Migration Architecture and Assessment

During an OCI migration assessment, which artifact should capture the current-state inventory of servers, dependencies, and utilization baselines before any target design is drafted?

  1. A landing zone Terraform plan
  2. A discovery and dependency baseline report Correct answer.
  3. A post-migration test summary
  4. A cutover runbook

Explanation

The assessment phase begins with discovery so that sizing, dependency mapping, and wave planning rest on measured facts rather than assumptions. A dependency baseline records what exists, how components communicate, and observed utilization. Cutover runbooks and Terraform plans are design and execution artifacts produced after the baseline is agreed.

Question 27Migration Architecture and Assessment

Which metric collected during discovery is most useful for right-sizing an OCI compute shape for a rehosted application?

  1. The number of installed device drivers
  2. Peak and average CPU and memory utilization over a representative period Correct answer.
  3. The count of open support tickets last year
  4. The application's source code line count

Explanation

Right-sizing depends on observed resource consumption, so sustained average and peak CPU and memory utilization over a representative window drive shape selection. Driver counts, code volume, and ticket history do not describe resource demand and would produce an arbitrary shape choice.

Question 28Migration Architecture and Assessment

An architect is assessing a three-tier application whose web tier is stateless but whose middle tier keeps session state in local memory. What assessment conclusion most directly affects the target architecture?

  1. The web tier must be consolidated onto a single large instance
  2. The middle tier requires session affinity or externalized session state before it can scale horizontally Correct answer.
  3. The database tier must be converted to a non-relational store
  4. The application cannot be migrated to OCI

Explanation

In-memory session state on the middle tier means horizontal scaling would break user sessions unless affinity is configured or state is externalized to a shared store. This finding shapes the target design and the remediation backlog. It does not force consolidation, a database change, or block migration entirely.

Question 29Migration Architecture and Assessment

Which OCI capability should an architect use during assessment to estimate the monthly run rate of a proposed target architecture before workloads are deployed?

  1. The OCI cost estimator with the planned shapes, storage, and network egress Correct answer.
  2. The OCI Identity and Access Management policy simulator
  3. The OCI Audit service log export
  4. The OCI Block Volume backup policy

Explanation

The cost estimator models planned compute, storage, and networking to produce a forward-looking monthly estimate for the target design. Audit logs, backup policies, and the policy simulator govern operations and security rather than cost forecasting.

Question 30Migration Architecture and Assessment

An assessment finds an application with a hard dependency on a proprietary hardware dongle attached to a physical server. What is the most appropriate way to record and handle this finding?

  1. Exclude the application from the migration inventory
  2. Assume the dongle will work through USB passthrough on any OCI shape
  3. Log it as a migration blocker and evaluate vendor cloud licensing or an emulation alternative Correct answer.
  4. Replace the application with an open-source equivalent without further analysis

Explanation

Hardware-bound licensing is a classic blocker that must be documented and resolved through vendor negotiation or a supported alternative before wave assignment. Dropping it from the inventory hides risk, and USB passthrough is not a general guarantee on cloud compute. Replacing the application is a business decision requiring analysis, not an assessment default.

Question 31Migration Architecture and Assessment

Which assessment practice best identifies undocumented network flows between applications before wave planning?

  1. Counting the number of servers in each subnet
  2. Interviewing only the application owner
  3. Analyzing flow logs and connection data collected from network devices and hosts Correct answer.
  4. Reviewing the application's marketing documentation

Explanation

Undocumented dependencies are best surfaced by observed traffic data such as flow logs and connection records, which reveal actual communication paths. Owner interviews supplement but do not replace this evidence, and marketing material or server counts say nothing about flows.

Question 32Migration Architecture and Assessment

An application's assessment shows it uses a relational database with heavy stored procedure logic and tight latency requirements to a co-located reporting engine. Which target pattern should the architect evaluate first?

  1. Convert all stored procedures to client-side application code immediately
  2. Move the database to object storage and query it directly
  3. Rehost the database on a comparable OCI database service with the reporting engine in the same region and low-latency network path Correct answer.
  4. Split the database and reporting engine across distant regions

Explanation

Tight latency and procedural logic favor preserving the database engine on a comparable managed service while keeping dependent components close. Object storage is not a relational query engine, cross-region placement adds latency, and rewriting procedures is remediation work that should not be the first assumption.

Question 33Migration Architecture and Assessment

Which assessment deliverable should define the acceptance criteria that determine whether a migrated workload is considered successfully transitioned?

  1. A test and validation plan tied to business and technical success criteria Correct answer.
  2. A list of all OCI regions
  3. A glossary of cloud terminology
  4. A copy of the OCI shared responsibility model

Explanation

Acceptance criteria must be explicit and testable, so a validation plan mapping tests to business and technical success criteria is the right deliverable. Region lists, the shared responsibility model, and glossaries are reference material and do not define workload acceptance.

Question 34Migration Architecture and Assessment

During assessment, an architect discovers that two applications write to the same on-premises database schema and must be migrated together. How should this affect wave planning?

  1. Place both applications in the same wave so the shared schema is cut over atomically Correct answer.
  2. Migrate the schema first and leave both applications on-premises
  3. Assign each application to a different migration team with no coordination
  4. Split them across waves to reduce blast radius

Explanation

A shared writable schema creates a coupling that requires coordinated cutover, so the dependent applications belong in the same wave. Splitting them or leaving them behind would break data consistency, and uncoordinated teams would produce conflicting changes.

Question 35Migration Architecture and Assessment

Which OCI service should an architect evaluate when an assessed workload requires a managed relational database that is compatible with an existing Oracle Database deployment and supports automated backups?

  1. OCI Object Storage
  2. Oracle Base Database Service Correct answer.
  3. OCI Streaming
  4. OCI API Gateway

Explanation

Oracle Base Database Service provides a managed Oracle Database environment with automated backup capabilities, matching the compatibility requirement. Object Storage, Streaming, and API Gateway serve storage, event ingestion, and API management needs respectively.

Question 36Migration Architecture and Assessment

An assessment finds a workload with a large number of small, chatty remote procedure calls between two tiers. Which target design consideration most affects whether the workload meets its latency targets in OCI?

  1. Placing the tiers in the same availability domain and region with low-latency connectivity Correct answer.
  2. Increasing the retention period of audit logs
  3. Enabling object versioning on the storage bucket
  4. Choosing the largest available compute shape for both tiers

Explanation

Chatty protocols amplify round-trip latency, so keeping tightly coupled tiers close together on a low-latency path is the dominant design factor. Larger shapes do not reduce network round-trip time, and object versioning or audit retention are unrelated to latency.

Question 37Migration Architecture and Assessment

Which assessment question best determines whether an application is a candidate for replatforming rather than rehosting?

  1. What is the application's current backup window?
  2. How many users log in during peak hours?
  3. Which team currently owns the application?
  4. Can the application's runtime dependencies be replaced by managed OCI services with limited code change? Correct answer.

Explanation

Replatforming means adopting managed services with limited code change, so the decisive assessment question is whether dependencies can be swapped for managed equivalents without major rework. User counts, backup windows, and ownership are relevant context but do not determine the migration strategy.

Question 38Migration Architecture and Assessment

A workload assessment shows a 5 TB database with a nightly change rate of 50 GB and a requirement that cutover downtime not exceed two hours. Which migration approach is most appropriate to evaluate?

  1. A one-time logical export and import during the cutover window
  2. Shipping tapes to the OCI region
  3. Physical data transfer with incremental change synchronization followed by a short cutover Correct answer.
  4. Rebuilding the database from application logs

Explanation

A modest change rate relative to data size allows an initial bulk transfer followed by incremental synchronization, keeping the final cutover within the downtime budget. A one-time export of 5 TB would likely exceed two hours, tapes introduce shipping delay, and application logs cannot reconstruct a database.

Question 39Migration Architecture and Assessment

Which assessment finding most directly justifies including an application in an early migration wave?

  1. A pending vendor contract renewal in eighteen months
  2. An undocumented dependency on a mainframe transaction monitor
  3. High regulatory complexity with unresolved data residency questions
  4. Low business criticality with well-understood dependencies and a small footprint Correct answer.

Explanation

Early waves should build confidence and prove the migration factory, so low-criticality, well-understood, small-footprint applications are ideal. Regulatory uncertainty, contract timing, and undocumented mainframe dependencies add risk and belong later once patterns are established.

Question 40Migration Architecture and Assessment

Which OCI construct should an architect use to logically separate the target environments for different business units while centralizing network and identity governance?

  1. Compartments within a tenancy organized under a defined hierarchy Correct answer.
  2. A single compartment shared by all business units
  3. A separate tenancy for every application
  4. Individual user accounts with full administrator rights

Explanation

Compartments provide logical isolation for resources, quotas, and access policies while remaining under one tenancy, which supports centralized governance. A tenancy per application is operationally heavy, a shared compartment removes isolation, and broad administrator accounts violate least privilege.

Question 41Migration Architecture and Assessment

An assessment reveals that an application depends on a directory service using LDAP for authentication. Which target design question is most important to resolve before migration?

  1. Whether the application's logo needs updating
  2. Whether the current servers use SSD or HDD storage
  3. Whether the LDAP dependency can be met by an OCI identity solution or a directory service reachable from the target network Correct answer.
  4. Whether the application uses TCP or UDP for its health checks

Explanation

Authentication dependencies are security-critical and must map to a supported identity service or a reachable directory before cutover. Branding, health-check protocol, and disk type are minor or unrelated to the identity integration decision.

Question 42Migration Architecture and Assessment

Which source of information should an architect treat as authoritative when reconciling conflicting utilization figures during assessment?

  1. Anecdotal estimates from a single administrator
  2. Monitoring data collected over a representative period from the production systems Correct answer.
  3. Assumptions recorded in an early draft design
  4. Vendor marketing benchmarks for similar workloads

Explanation

Measured production monitoring over a representative period is the most defensible evidence for sizing and capacity decisions. Anecdotes, vendor benchmarks, and draft assumptions may inform context but should not override observed data.

Question 43Migration Architecture and Assessment

An assessment identifies that an application's database contains sensitive personal data subject to a regulation requiring that data not leave a specific country. Which conclusion should the architect record?

  1. The application must be rehosted on a mainframe
  2. The data must be converted to a non-relational format
  3. The target region and any replication or backup destinations must remain within the permitted geography Correct answer.
  4. The application must be retired

Explanation

Data residency obligations constrain where data may be stored, replicated, and backed up, so region selection and replication topology must respect the permitted geography. Engine changes, platform changes, or retirement are separate decisions not implied by the requirement.

Question 44Migration Architecture and Assessment

Which assessment output should feed directly into the design of the target network topology?

  1. A catalog of application user interfaces
  2. A summary of past incident tickets
  3. A dependency map showing required communication paths, ports, and latency sensitivity Correct answer.
  4. A list of application owners

Explanation

Network design requires knowing which systems must communicate, over which ports and protocols, and with what latency sensitivity, so the dependency map is the direct input. Ownership lists, incident summaries, and UI catalogs do not describe traffic requirements.

Question 45Migration Architecture and Assessment

An application assessment notes that the workload's storage layer performs many small random writes and requires sub-millisecond latency. Which OCI storage option should the architect evaluate first?

  1. Object Storage standard tier
  2. Block Volume with a high-performance volume performance setting Correct answer.
  3. File Storage with the lowest throughput share
  4. Archive Storage

Explanation

Small random writes with sub-millisecond latency requirements call for block storage tuned for high performance. Object and archive storage are designed for durability and cost rather than low-latency random I/O, and a low-throughput file share would not meet the latency target.

Question 46Migration Architecture and Assessment

Which risk should an architect flag when an assessed application has no documented disaster recovery plan and currently relies on a single on-premises data center?

  1. The migration may reproduce a single point of failure unless resilience is designed into the target Correct answer.
  2. The application will automatically gain high availability in OCI
  3. The application's data will be lost during migration
  4. The application cannot be assessed without a DR plan

Explanation

Lift-and-shift of a single-data-center design can carry the same single point of failure into the cloud unless resilience is explicitly designed. High availability is not automatic, data loss is not an inherent consequence of migration, and assessment can proceed while the gap is recorded.

Question 47Migration Architecture and Assessment

Which technique best estimates the effort of converting a large estate of database objects to a managed target service during assessment?

  1. Measuring the size of the database backup files
  2. Asking each developer for a rough guess
  3. Counting the number of database users
  4. Automated schema and code scanning to classify objects by complexity and required changes Correct answer.

Explanation

Automated scanning classifies objects and code by incompatibility and complexity, producing a defensible effort estimate across a large estate. Individual guesses are inconsistent, and user counts or backup sizes do not correlate with conversion effort.

Question 48Migration Architecture and Assessment

An assessment shows an application uses a message queue with at-least-once delivery and its consumers are not idempotent. What should the architect record as the key remediation item?

  1. Move the queue to a different region
  2. Reduce the number of consumers to one
  3. Make consumers idempotent so duplicate deliveries do not corrupt data Correct answer.
  4. Increase the queue's message retention period

Explanation

At-least-once delivery permits duplicates, so non-idempotent consumers risk double processing and data corruption; idempotency is the correct remediation. Retention changes, region moves, or reducing consumers do not remove the duplicate-delivery risk.

Question 49Migration Architecture and Assessment

Which assessment activity best confirms that an application's backup and restore requirements can be met by the proposed OCI target?

  1. Reviewing the application's user manual
  2. Mapping recovery point and recovery time objectives to the backup, replication, and restore capabilities of the target services Correct answer.
  3. Counting the number of database indexes
  4. Interviewing the application's marketing team

Explanation

Recovery objectives must be matched against concrete target capabilities for backup frequency, replication, and restore time. Manuals, index counts, and marketing interviews do not establish whether the target can satisfy recovery point and recovery time objectives.

Question 50Migration Architecture and Assessment

A portfolio assessment finds that several applications share a common middleware platform that is out of vendor support. Which approach best reduces risk across the portfolio?

  1. Defer all affected applications indefinitely
  2. Rehost the middleware unchanged and ignore the support gap
  3. Migrate each application independently with a different middleware choice
  4. Treat the shared middleware as a portfolio-level workstream with a single target decision applied consistently Correct answer.

Explanation

A shared, unsupported platform is a cross-cutting risk, so a single portfolio-level decision applied consistently avoids duplicated effort and divergent architectures. Independent choices create sprawl, indefinite deferral leaves the support gap unresolved, and rehosting unchanged preserves the risk.