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| Section | Objectives |
|---|---|
| Delivering Services and Content on Alibaba Cloud | - Delivering Services and Content on Alibaba Cloud |
| Building Highly Available, Performant Cloud Architecture | - Leveling up Your Core Infrastructure |
| Building Enterprise-grade Networks on Alibaba Cloud | - Cloud Networking Deep Dive |
| Securing Workloads on Alibaba Cloud | - Alibaba Cloud Security Deep Dive |
| Core Infrastructure Deep Dive | - Best Practices for Database Services - Core Storage Infrastructure Deep Dive - Core Compute Infrastructure Deep Dive |
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NEW QUESTION # 11
Liam ' s company operates an on-premises data analytics platform across 12 servers. The system runs scheduled jobs (70% of the time, each job taking anywhere from 20 minutes to 2 hours to complete, with tight SLAs) and user jobs (30% of the time, each job taking less than 5 minutes, with no SLA requirements).
Scheduled jobs must continue to meet SLAs during system failures, while user jobs can be delayed.
As a Cloud Architect, you are tasked to migrate the system to Alibaba Cloud ECS using a consumption-based model while maintaining the same high availability and SLA requirements.
Which solution is the MOST cost-effective and flexible?
Answer: B
Explanation:
Option A offers the strongest combination of resilience, predictable baseline capacity, flexibility, and reduced cost. Nine standard pay-as-you-go ECS instances are spread evenly across three zones and can support the scheduled workloads that have strict SLA requirements. The remaining three instances use lower-cost preemptible/spot capacity for user jobs that can tolerate interruption or delay.
Alibaba Cloud describes spot instances as offering the same compute performance as ordinary pay-as-you-go ECS but at substantially lower prices, with the trade-off that capacity can be reclaimed. This makes spot capacity appropriate for interruption-tolerant workloads but inappropriate as the sole capacity supporting strict SLAs.
A Savings Plan discounts eligible pay-as-you-go ECS usage while preserving significantly greater flexibility than traditional reserved-instance matching. Current Alibaba Cloud documentation states that Savings Plans apply discounts to pay-as-you-go usage and can offer flexibility across instance configurations; they do involve a one- or three-year hourly spend commitment, but they do not provision or reserve fixed ECS capacity.
Options C and D concentrate too much reliable capacity into fewer zones or place excessive workload on interruptible capacity. Option A therefore provides the best workload-tiering and multi-zone design among the available choices.
Study Guide reference: Building Highly Available, Performant Cloud Architecture - multi-zone ECS, workload resilience, Savings Plans, and spot instances.
NEW QUESTION # 12
A company runs an application on an on-premises Windows Server. The application stores data using an Oracle Database Standard Edition server. The company plans to migrate to Alibaba Cloud while minimizing development changes. The Alibaba Cloud application environment should be highly available.
As a Cloud Architect, which combination of actions would you propose the company take to meet these requirements? (Correct answers: 2)
Answer: A,E
Explanation:
Option C provides the lowest-change migration path for the application tier. Rehosting the existing Windows workload on Windows Server ECS instances preserves its operating-system environment while distributing instances across availability zones improves resilience against zone-level infrastructure failures.
For the database tier, Option A provides the stronger managed architecture. Alibaba Cloud explicitly supports using DTS to migrate self-managed Oracle databases to PolarDB for PostgreSQL (Compatible with Oracle), including schema, full-data, and incremental-data migration for minimal migration downtime.
PolarDB ' s Oracle-compatible edition is specifically engineered to run Oracle workloads with minimal application modification. It supports Oracle-compatible data types, SQL constructs, PL/SQL features, OCI connectivity, packages, sequences, synonyms, and related functionality.
It also provides built-in high availability: failures are detected automatically and workloads can fail over to healthy nodes. This provides a more complete managed availability architecture than simply deploying independent self-managed Oracle servers across zones, which would additionally require Oracle-level replication/failover configuration.
Options B and D require substantial application refactoring and therefore conflict with the explicit requirement to minimize development changes.
Study Guide reference: Building Highly Available, Performant Cloud Architecture - workload migration, ECS multi-zone design, DTS, and PolarDB Oracle compatibility.
NEW QUESTION # 13
Jenny developed a healthcare analytics platform on Alibaba Cloud. To meet performance, disaster recovery, and compliance requirements, the platform requires continuous data replication across zones for fault tolerance and cost-efficient storage of historical patient data for regulatory retention. Jenny has recruited you to help build a solution to address these challenges.
Which of the following strategies would you propose? (Correct answers: 2)
Answer: A,C
Explanation:
Data Transmission Service and OSS lifecycle management address the two distinct requirements:
continuously replicated operational data and economical long-term retention.
DTS provides real-time data synchronization by continuously capturing changes from a source database and applying them to a destination. Alibaba Cloud identifies active geo-redundancy, disaster recovery, cross- region replication, and real-time data synchronization as standard DTS scenarios. Maintaining a secondary synchronized dataset in another failure domain therefore provides substantially better recovery characteristics than relying only on periodic backups.
Historical data has a different access pattern. Regulatory medical records can remain necessary for years while being rarely retrieved. OSS lifecycle policies can automatically transition aging objects from frequently accessed storage into lower-cost storage classes such as Archive. Alibaba Cloud specifically describes lifecycle policies for medical records and other compliance datasets that become cold over time.
Option B provides backup protection but does not directly provide the requested continuous replication architecture and unnecessarily introduces self-managed databases on ECS. DMS simplifies database administration but is not a data-replication or archival-storage mechanism.
Consequently, DTS supplies the live replication/fault-tolerance layer, while OSS lifecycle policies supply automated and cost-efficient long-term retention.
Study Guide reference: Building Highly Available, Performant Cloud Architecture - DTS replication, disaster recovery, OSS lifecycle management, and compliance-oriented storage.
NEW QUESTION # 14
A worldwide retail company is adapting their e-commerce platform to handle spikes in online traffic during annual sales events. They are using Alibaba Cloud services and need a solution that can automatically scale resources to maintain performance during these peaks.
What solutions should the company implement to efficiently manage their resources during high-traffic periods? (Correct answers: 3)
Answer: B,C,D
Explanation:
The strongest architecture for an existing e-commerce platform experiencing predictable but substantial traffic spikes is OSS/CDN + ALB + Auto Scaling. Auto Scaling is specifically designed to increase ECS capacity when traffic or resource utilization rises and remove unnecessary instances after demand subsides. Alibaba Cloud documents this as a core mechanism for handling traffic spikes while avoiding permanent over- provisioning.
ALB complements Auto Scaling by distributing requests across healthy ECS backend instances. As scaling creates additional instances, they can be automatically added to the ALB server group, allowing traffic to use the enlarged compute pool immediately.
Static images and videos should be moved to OSS and accelerated through CDN. CDN caches static resources on geographically distributed edge nodes, substantially reducing requests reaching the ECS application tier and lowering origin bandwidth and processing load during sales events.
Function Compute is highly elastic, but introducing it merely to supplement an existing server-based application normally requires application restructuring. It is therefore less directly applicable than the three mechanisms specifically designed to scale and offload the existing architecture.
Study Guide reference: Building Highly Available, Performant Cloud Architecture - Auto Scaling, ALB, CDN offloading, and elastic ECS architecture.
NEW QUESTION # 15
Priya is building a remote office application, and is looking for a storage solution to go with it. The solution must be highly available and scalable, and must be able to function as a file system that can be mounted to multiple Linux instances on Alibaba Cloud, as well as on-prem machines using native protocols such as Network File System (NFS) or Server Message Block (SMB).
For ease of use, Priya has set up a VPN Gateway between their network and their application ' s VPC on Alibaba Cloud.
Which of the following storage solutions meets this requirement?
Answer: B
Explanation:
File Storage NAS is Alibaba Cloud ' s managed shared filesystem service and is the correct storage family for workloads that require standard filesystem semantics and mounting by many clients. NAS supports NFS and SMB-based access, and a mount target acts as the private VPC endpoint through which clients access a NAS filesystem. General-purpose NAS currently supports up to two mount targets, and a mount target can be concurrently accessed by large numbers of compute nodes.
Alibaba Cloud also explicitly supports accessing NAS from an on-premises data center through VPN Gateway. This means the same private network architecture can accommodate cloud-hosted ECS clients and systems connected through the enterprise VPN.
OSS provides object semantics rather than a native shared NFS/SMB filesystem. EBS is block storage attached to compute instances and would require Priya to build and maintain custom file-server proxies, reducing availability and increasing administration.
Among the offered answers, multiple NAS mount points best align with the requirement for scalable managed file storage and resilient access paths while preserving standard filesystem protocols.
Study Guide reference: Core Infrastructure Deep Dive - File Storage NAS, NFS/SMB, mount targets, and hybrid-cloud storage.
NEW QUESTION # 16
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