Huawei H13-811_V3.5 HCIA-Cloud Service V3.5 Exam Practice Test

Memory-optimized ECSs are specifically designed for the workload described. Huawei Cloud defines memory-optimized ECSs as instances that excel at processing large in-memory datasets and high-throughput networking . They are intended for memory-intensive workloads involving large datasets, frequent or heavy data access, and requirements for rapid data processing and exchange.

The scenario deliberately combines several identifying characteristics: large-memory datasets, substantial data volumes, high numbers of access requests, demanding network performance, and rapid data transfer and processing. These characteristics correspond directly to the design profile of the memory-optimized ECS family. Huawei lists representative applications such as high-performance databases, in-memory databases, distributed memory caches, data analysis and mining, Hadoop, Spark, e-commerce, and other enterprise applications.

Ultra-high I/O instances emphasize extremely high storage IOPS and low disk latency. High-performance computing instances are optimized primarily for compute-intensive scientific or engineering workloads. Although “large-memory” may appear plausible, memory-optimized is the ECS category whose official description explicitly combines large in-memory datasets with high-throughput networking and heavy data access.

Therefore, D is the precise Huawei Cloud classification required by the scenario.

Reference topics: ECS Types and Specifications; Memory-Optimized ECSs; Memory-Intensive Workloads; High-Throughput Networking.

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For the HCIA-Cloud Service V3.5 snapshot model represented by this question, the statement is FALSE. Huawei Cloud's exam-era EVS documentation states that an EVS snapshot captures the state of a disk at a specific point in time and can be used for rollback or creation of another disk. However, the snapshot is dependent on its source EVS disk.

Huawei's earlier official EVS documentation explicitly states that when an EVS disk is deleted, the disk data and snapshots created for that disk are also deleted. The applicable documentation also states that when a snapshot's source disk is deleted, all snapshots of that source disk are deleted.

This distinction matters because Huawei has subsequently introduced standard snapshots stored in OBS, for which newer lifecycle behavior can differ. Current documentation distinguishes legacy snapshots from standard snapshots: legacy snapshots are deleted with the source disk, whereas newer standard snapshots may remain. However, HCIA V3.5 questions were written around the earlier EVS snapshot behavior.

Accordingly, the proposition that deleting an EVS disk does not delete its snapshots contradicts the V3.5-era model.

Reference topics: EVS Snapshots; Snapshot Lifecycle; EVS Disk Deletion; Point-in-Time Recovery.

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The major CTS functions represented by the options are trace recording, trace query, and trace transfer , making A, B, and D correct.

Trace recording captures operations performed through the Huawei Cloud management console, through APIs, and operations initiated by supported cloud services. These records provide an audit trail containing information such as the operator, operation time, resource, operation result, and associated request data.

Trace query allows administrators and auditors to search recent operational records on the CTS console using criteria such as trace source, resource type, operator, trace status, and operation type. This is essential for security auditing, compliance investigation, and troubleshooting.

Trace transfer provides longer-term retention and centralized analysis. CTS can package operation records into trace files and transfer them to supported destinations such as OBS or LTS for preservation and subsequent processing.

Option C, OS monitoring , does not belong to CTS. Operating-system performance monitoring is primarily a Cloud Eye/server-monitoring capability rather than an audit-trace function.

Huawei's official CTS documentation expressly identifies recording, querying, and transfer among its core service functions.

Reference topics: Cloud Trace Service; Trace Recording; Trace Query; Trace Transfer; Cloud Auditing.

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KooSearch is the Huawei Cloud service specifically designed to provide enterprise-grade search capabilities with an out-of-the-box service model. Huawei Cloud describes KooSearch as a one-stop intelligent enterprise search solution built on Cloud Search Service (CSS). It enables organizations to construct enterprise search, knowledge retrieval, AI search, and document Q & A applications without having to independently build the underlying search infrastructure. The service integrates enterprise knowledge sources, search models, vector search capabilities, and other components required for enterprise information retrieval.

This directly corresponds to the question's description of an out-of-the-box search service designed for enterprise digitalization . Huawei's current KooSearch documentation explicitly emphasizes its ready-to-use enterprise search and RAG capabilities. KooPhone is associated with cloud-phone capabilities, KooMessage concerns enterprise messaging and communication, and KooMap provides map-related services; none is the dedicated enterprise search offering.

Therefore, KooSearch is the only technically valid choice . This aligns with the HCIA-Cloud Service domain covering Huawei Cloud platform and other value-added cloud services.

Reference topics: KooSearch Service Overview; Cloud Search Service; Huawei Cloud PaaS/aPaaS Services.

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Option D is incorrect . Huawei Cloud's official RDS for PostgreSQL constraints specify that a maximum of five read replicas can be created for one DB instance , not 15. Huawei's current read-replica documentation reiterates the same five-replica limit. The “15 read replicas” characteristic is associated with other Huawei database architectures, such as TaurusDB/GaussDB-related scaling designs, and must not be transferred to standard RDS for PostgreSQL.

Option C is directly supported by Huawei documentation. RDS for PostgreSQL is an object-relational database designed for complex OLTP and supports NoSQL and GIS data types. Huawei explicitly identifies websites, location-based applications, and complex data object processing as representative workloads.

Option B is also valid. Huawei Cloud provides real-time status and performance monitoring for RDS instances, exposing database-related metrics and allowing alarms to be configured for operational monitoring.

Option A reflects the managed-service security architecture: RDS provides controls involving network isolation, security groups, SSL, account authorization, backups, and other mechanisms to protect databases and user data.

The numerical scaling claim in D therefore makes it decisively incorrect.

Reference topics: RDS for PostgreSQL; Read Replicas; Database Monitoring; PostgreSQL Application Scenarios; RDS Security.

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The statement is TRUE and closely follows Huawei Cloud's official definition of Object Storage Service. OBS is a cloud-based object storage platform designed to provide scalable, secure, durable, and cost-effective storage for large volumes of unstructured data. Huawei explicitly identifies OBS as a web service that exposes APIs through both HTTP and HTTPS.

Huawei provides several access mechanisms. Administrators and ordinary users can manage buckets and objects through the OBS Console and graphical or command-line OBS tools, while application developers can integrate OBS programmatically through supported SDKs and REST APIs. This enables applications to perform operations such as object upload, download, deletion, metadata management, lifecycle configuration, access control, and multipart upload without requiring direct interaction with the management console.

Huawei also describes OBS as accessible over the Internet from different locations, subject to authentication, authorization, network, and bucket-policy controls. The SDK/API layer is specifically intended to facilitate development of upper-layer applications using OBS as persistent object storage.

Therefore, every technical assertion in the statement corresponds to the official Huawei Cloud OBS architecture and access model.

Reference topics: Object Storage Service Overview; OBS APIs and SDKs; OBS Console; Object Storage Architecture.

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The statement is TRUE . Huawei Cloud makes an explicit architectural distinction between Elastic Cloud Servers and Bare Metal Servers regarding the underlying compute resources. An ECS is a virtualized compute instance. Multiple ECS instances can therefore consume resources provided by the same underlying physical host, with virtualization providing logical isolation between tenants and workloads.

A BMS, by contrast, provides exclusive access to physical compute resources. Huawei Cloud states directly that BMS users can exclusively access physical resources, whereas ECS users share those physical resources. This makes BMS particularly suitable for mission-critical systems, big-data clusters, enterprise middleware, high-performance workloads, and applications that require predictable performance or direct access to physical CPU and memory resources.

Huawei's BMS comparison also identifies Exclusive resources = Yes for BMS and traditional physical servers, but No for ECS. BMS additionally provides cloud characteristics such as automatic provisioning, VPC integration, image-based deployment, monitoring, and cloud storage while retaining physical-server performance.

Therefore, the differentiation presented in the question is technically accurate.

Reference topics: Bare Metal Server Fundamentals; BMS versus ECS; ECS Virtualization; Exclusive Physical Resources.

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The statement is FALSE because directly binding an EIP to an ECS is only one of several Huawei Cloud mechanisms for providing Internet access. An ECS with its own EIP can communicate directly with the public network, but ECSs can also access the Internet without having an EIP individually bound to each server .

The principal alternative is a public NAT Gateway using an SNAT rule . Huawei Cloud states that servers in a VPC subnet can share an EIP through a public NAT gateway. The NAT gateway translates their private source addresses into the configured public EIP, enabling outbound Internet connectivity while avoiding the need to expose or allocate an individual public IP address to every ECS.

Huawei's ECS documentation also explicitly describes “Internet connectivity for an ECS without an EIP bound” and recommends NAT Gateway as the standard solution. A proxy/SNAT ECS can also provide an Internet access path in suitable architectures.

Therefore, binding an EIP directly to the ECS is a valid method, but it is not the only method , making the statement false.

Reference topics: Elastic IP; Public NAT Gateway; SNAT; ECS Internet Connectivity; VPC Networking.

Option A is incorrect because it confuses full-access permissions with a read-only role. In Huawei Cloud IAM, a permission whose name contains FullAccess normally represents full or administrator-level permissions for the corresponding service. For example, IAMFullAccess provides full permissions for IAM operations rather than read-only access.

Huawei Cloud separately defines Tenant Guest as providing read-only permissions for cloud services other than IAM. This distinction is important in HCIA IAM authorization concepts: FullAccess and ReadOnlyAccess represent materially different privilege levels.

The remaining statements correctly describe Huawei Cloud authorization. IAM supports roles and policies as authorization mechanisms, with policies providing more fine-grained control. User groups provide an efficient way to authorize multiple IAM users: an administrator assigns permissions to a group and then places users in that group, after which the users inherit the group's permissions. Finally, an IAM user can perform only the cloud-service operations allowed by the permissions granted to that identity.

Thus, option A incorrectly assigns the behavior of a read-only permission model to FullAccess and is the required answer.

Reference topics: IAM Permissions; Roles and Policies; User Groups; FullAccess; Tenant Guest.

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Options B and C are incorrect because they reverse the isolation characteristics of IAM projects and enterprise projects . Huawei Cloud defines enterprise projects as a mechanism for grouping and managing resources across regions. Resources assigned to different enterprise projects are logically isolated , and a single enterprise project can contain resources residing in multiple regions. Supported resources can also be added to, removed from, or transferred between enterprise projects. Consequently, statements A and D correctly describe Enterprise Project Management.

IAM projects operate differently. Huawei Cloud documentation states that IAM projects are region-oriented and are used to group and physically isolate resources within a region . A project corresponds to a region, and an IAM project does not provide the cross-region logical grouping model associated with enterprise projects.

Therefore, B is wrong because it attributes physical, same-region isolation to enterprise projects, while C is wrong because it attributes logical isolation to IAM projects. The two concepts are intentionally distinguished in Huawei Cloud architecture: IAM project = regional/physical isolation; enterprise project = cross-region/logical resource organization .

Reference topics: IAM Projects; Enterprise Projects; Resource Isolation; Enterprise Management.

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Option A specifically describes Huawei Cloud's dynamic resource adjustment mode . In Huawei Auto Scaling, dynamic scaling uses an alarm policy that evaluates real-time monitoring metrics such as CPU utilization. When the configured alarm condition is reached, AS automatically performs a scaling action to increase or decrease resources so that capacity follows unpredictable workload changes.

Option B is incorrect because triggering an AS policy does not automatically redefine the configured maximum number of instances . The maximum is an upper boundary for the AS group. A scaling policy changes the expected number of instances, adds or removes instances, or sets the instance count to a configured value while remaining within the minimum and maximum boundaries.

Option C correctly describes planned scaling , but the question specifically asks about dynamic resource scaling. Huawei classifies scheduled and periodic policies as planned adjustment mechanisms suitable for workloads that change predictably according to a schedule.

Option D is incorrect because alarm-triggered scaling is subject to a cooldown period . During that period, Huawei Cloud rejects additional scaling requests generated by alarm policies to prevent repeated unnecessary scaling operations.

Therefore, for dynamic resource scaling, A is the correct answer .

Reference topics: Auto Scaling; Dynamic Resource Adjustment; Alarm Policies; Planned Scaling; Cooldown Period.

The statement is true in the context of the HCIA cloud-computing architecture model. Cloud computing evolved from developments in computing, distributed systems, virtualization, networking, and Internet technologies. Most importantly, cloud services are consumed remotely, making network connectivity an intrinsic part of service delivery.

Huawei Cloud defines cloud services as IT capabilities delivered by cloud providers through the Internet or dedicated networks . These services include compute, storage, networking, security, database, middleware, O & M, big data, and AI resources. Users obtain and consume those resources remotely rather than requiring the underlying physical infrastructure to reside locally.

This dependence is architectural rather than merely convenient. An ECS, database, object-storage bucket, SaaS application, or cloud management interface has practical value to a remote user only if network connectivity exists between the consumer and the cloud environment. A private connection can replace Internet access in certain enterprise architectures, but that is still network connectivity.

Accordingly, the intended HCIA principle is that cloud computing and networking are inseparable: network access forms the communication foundation through which cloud resources are delivered and consumed .

Reference topics: Cloud Computing Fundamentals; Network Access; Cloud Service Delivery; Internet and Dedicated Networks.

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Options A, B, and C are consistent with the fundamental characteristics and enabling technologies of cloud computing. Cloud platforms are designed to make resources elastic. Huawei Cloud Auto Scaling, for example, dynamically adds or removes ECS instances and adjusts related resources according to actual workload demand. Dynamic resource scaling is therefore a core practical capability of cloud computing.

On-demand deployment is also fundamental. Huawei Cloud's Cloud Adoption Framework explains that cloud resources can be provisioned, adjusted, and scaled rapidly without the traditional procurement and installation cycle associated with physical infrastructure. This allows organizations to create computing environments when needed and release them when demand decreases.

Virtualization is another important enabling technology. It allows physical computing resources to be abstracted, pooled, isolated, and efficiently shared among multiple workloads. Huawei Cloud specifically identifies virtualization and resource pooling as mechanisms that improve physical-resource utilization.

Option D is incorrect. A defining cloud characteristic is that the provider assumes responsibility for substantial portions of infrastructure construction and maintenance. The exact customer/provider boundary varies between IaaS, PaaS, and SaaS, but customers do not maintain all resources .

Reference topics: Cloud Computing Characteristics; Elasticity; On-Demand Provisioning; Virtualization; Shared Responsibility.

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The correct advantages are B, C, and D. Huawei Cloud EVS provides a range of disk specifications and performance classes so customers can select storage appropriate for different workloads and budgets. Huawei's EVS overview explicitly lists various disk types and high security/reliability among its principal benefits.

EVS is also easier to manage than traditional physical storage. Huawei documentation comparing EVS with traditional hard disks states that EVS disks provide higher reliability and I/O throughput and are easier to use. Cloud-based provisioning eliminates much of the physical installation, replacement, cabling, and capacity-management work associated with conventional disks.

Option A is incorrect. EVS is block storage intended for cloud servers and cannot be used independently. Huawei explicitly states that EVS disks must first be attached to a supported server and then initialized, partitioned, and formatted before applications can persist data on them.

High reliability derives from distributed storage and data-protection mechanisms, while the range of available disk classes enables workload-specific performance selection.

Therefore, various disk types, ease of use, and high reliability are advantages; independent use is not.

Reference topics: EVS Advantages; Block Storage; EVS Reliability; EVS Disk Types.

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The statement is false . Huawei Cloud ECS supports multiple billing models, and cost optimization is not exclusive to pay-per-use billing. The principal modes include yearly/monthly, pay-per-use, and spot pricing , with each optimized for different workload characteristics.

Pay-per-use is useful for workloads with uncertain or fluctuating demand because resources are billed according to actual usage and can be released when no longer required. However, yearly/monthly billing can provide a lower effective price for stable, long-running workloads because Huawei Cloud applies subscription discounts; the longer the committed subscription period, the greater the potential discount. Therefore, for predictable production workloads running continuously, yearly/monthly billing can be substantially more economical than pay-per-use.

Spot pricing is another cost-saving mechanism. Spot instances use market-based pricing and can provide compute resources at a lower price where workload interruption characteristics permit their use. Consequently, several ECS billing models can reduce expenditure when aligned to an appropriate workload.

The incorrect portion of the statement is therefore the assertion that only pay-per-use can reduce costs .

Reference topics: Elastic Cloud Server; ECS Billing Modes; Yearly/Monthly; Pay-per-Use; Spot Pricing.

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The statement is TRUE. Huawei Cloud OBS provides several resource-based authorization mechanisms, including bucket policies and object policies. Their principal distinction is the scope of resources to which they apply.

Huawei's official OBS Permission Configuration Guide explicitly states that an object policy applies to only one object in a bucket, whereas a bucket policy applies to multiple objects or all objects within the bucket. This enables administrators to select the authorization mechanism that best matches the required granularity.

An object policy is useful when permissions must be configured specifically for an individual object, such as granting another principal read or write permissions to one particular resource without broadening access to the rest of the bucket.

A bucket policy supports broader authorization scenarios. Its policy statements can define principals, actions, resources, effects, and conditions to grant or restrict access to selected objects, prefixes, or the entire bucket. Typical uses include allowing another Huawei Cloud account to access specified OBS resources or granting IAM identities access to defined bucket content.

The question therefore correctly distinguishes object-level policy scope from bucket-level multi-object policy scope.

Reference topics: OBS Permission Management; Object Policies; Bucket Policies; Resource-Based Authorization.

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Statement C is false because it gives the definition of a shared image rather than a private image. Huawei Cloud defines a private image as an image available to the user who created it. Such an image can contain an operating system, pre-installed public applications, service data, and the user's own applications. It is commonly used to rapidly create identically configured ECS instances.

A shared image , conversely, is a private image that another Huawei Cloud user has explicitly shared with the recipient. Therefore, saying that “a private image is shared by other users” reverses these concepts.

Option A is correct. Huawei describes Marketplace images as third-party images containing an operating system, application environment, and software already installed, allowing rapid deployment of application environments.

Option B is also correct: public images are standardized system images provided by the cloud platform and made available broadly to customers.

Option D conforms to Huawei IMS sharing restrictions. Huawei Cloud specifies that encrypted images cannot be directly shared with other tenants; an encrypted image must first be replicated as an unencrypted image if sharing is required.

Thus, C is the single incorrect statement .

Reference topics: Image Management Service; Public Images; Private Images; Shared Images; Marketplace Images; Image Encryption.

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Option A is not a main WAF function . Huawei Cloud Web Application Firewall is an application-layer web protection service . It analyzes HTTP and HTTPS traffic and protects websites against threats such as SQL injection, cross-site scripting, command injection, malicious bots, scanners, CC attacks, and other web exploits.

Huawei explicitly lists information leakage prevention , web tamper protection , and anti-crawler protection among WAF's protection functions. Information leakage prevention can mask or block sensitive information such as ID numbers, phone numbers, and email addresses. Web tamper protection prevents unauthorized modification of protected static website pages. Anti-crawler protection identifies and mitigates malicious automated crawler behavior.

Brute-force attacks against ECS operating-system or application accounts , however, fall primarily under Host Security Service (HSS) . Huawei documents HSS detection and blocking capabilities for brute-force attacks involving services such as SSH, RDP, MySQL, SQL Server, and FTP.

WAF can mitigate certain web-based authentication abuse using web rules and rate controls, but generic ECS account brute-force protection is not the WAF function described here.

Therefore, the required answer is A .

Reference topics: Web Application Firewall; Information Leakage Prevention; Web Tamper Protection; Anti-Crawler; Host Security Service.

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