H13-811_V3.5 Huawei HCIA-Cloud Service V3.5 Free Practice Exam Questions (2026 Updated)

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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Option B is incorrect . Huawei Cloud explicitly requires subnet CIDR blocks within the same VPC to be unique and not overlap . Allowing overlapping subnets would make local route selection ambiguous and create address conflicts inside the VPC. Huawei's subnet definition therefore states that subnets in a VPC cannot overlap with each other.

Option A is correct for subnet planning: Huawei advises users to plan subnet address ranges carefully because a subnet's CIDR block cannot be changed after creation. This is why future capacity requirements should be considered before allocating subnet prefixes.

Option C is also consistent with Huawei's VPC definition. A subnet represents a unique CIDR block containing an IP address range inside a VPC, and VPC resources requiring private networking are deployed into these subnets. Option D is correct because the subnet CIDR must fall within the VPC's address range. Huawei's network-planning guidance explicitly states that the subnet CIDR block must be within the VPC CIDR block and that subnet CIDR blocks in the VPC must be unique.

Thus, the only incorrect planning statement is B .

Reference topics: VPC and Subnet Planning; CIDR Blocks; Subnet Addressing; VPC Network Design.

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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 because Huawei Cloud NAT Gateway includes both public NAT Gateway and private NAT Gateway functionality. These two service types cover the two network-translation scenarios described.

A public NAT Gateway performs translation between a private VPC network and the Internet. Through SNAT, servers with private IP addresses can share Elastic IP addresses to access public networks. Through DNAT, internal servers can provide externally accessible services using public addresses.

A private NAT Gateway performs address translation between private networks. Huawei Cloud describes private NAT gateways as enabling servers in a VPC to communicate with on-premises data centers or other VPCs while translating private addresses to transit IP addresses. This is particularly valuable during network migration, address-overlap resolution, and hybrid-cloud integration.

Huawei's official NAT Gateway comparison therefore states that a public NAT Gateway connects a private network to the Internet, whereas a private NAT Gateway connects private networks.

The statement deliberately describes the NAT Gateway service family rather than only public NAT. Since Huawei Cloud provides translation in both private-to-private and private-to-public architectures, the proposition is correct.

Reference topics: NAT Gateway; Public NAT Gateway; Private NAT Gateway; SNAT; DNAT.

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Option D is incorrect because improved response speed and website availability are fundamental objectives of CDN . Huawei's official CDN description explicitly characterizes CDN as a smart virtual network on Internet infrastructure that caches origin content at points of presence closer to users. This reduces transmission distance and accelerates access.

Huawei specifically states that CDN speeds up site response and improves site availability , while overcoming bottlenecks associated with low bandwidth, heavy user traffic, and uneven distribution of network nodes. Therefore, claiming that CDN cannot improve response speed or availability directly contradicts the documented purpose of the service.

Option A is essentially Huawei's own definition of CDN. Option B correctly describes major problems addressed by distributed content caching and request scheduling. Option C is also correct: content is cached or distributed to edge PoPs, and requests are scheduled to suitable nearby nodes. This reduces the requirement for every request to reach the original server.

CDN can additionally reduce origin-server workload and bandwidth consumption, which may improve origin infrastructure efficiency. However, that benefit exists alongside , not instead of, faster response and improved availability.

Accordingly, D is the only incorrect statement.

Reference topics: CDN Fundamentals; CDN PoPs; Website Acceleration; Content Distribution; Site Availability.

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Options B, C, and D identify problems that CDN architecture is designed to mitigate. Huawei defines CDN as an intelligent virtual network built on Internet infrastructure that caches origin content on geographically distributed points of presence close to users. This substantially shortens the network path between users and frequently requested resources.

Consequently, CDN improves download speed because users can retrieve cached files from a nearby edge PoP rather than repeatedly crossing long-distance networks to the origin server. It also addresses slow website access by accelerating static content delivery, reducing latency, and improving site response and availability. Huawei specifically states that CDN breaks through bottlenecks associated with limited bandwidth, high access traffic, and uneven network-node distribution.

Caching popular content at edge nodes also reduces repeated traffic flowing through core and backbone networks. This alleviates bandwidth pressure on both the origin infrastructure and long-distance network paths.

Option A is not a CDN problem statement. CDN commonly reduces origin-server load , meaning utilization of origin resources may decrease rather than fixing a problem described as “low server utilization.” Its purpose is acceleration and traffic offloading, not increasing server utilization.

Therefore, B, C, and D are correct.

Reference topics: Content Delivery Network; Edge Caching; Website Acceleration; Download Acceleration; Origin Traffic Reduction.

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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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Option A is the only sequence that respects the essential dependency chain for Huawei Cloud Log Tank Service host-log collection. A log group must exist before its log stream can be created , because a log stream is a subordinate storage and management unit within a log group. Huawei explicitly describes log groups and streams as the basic units used to manage logs and requires creation of the group before creation of its contained stream.

ICAgent is the host-side log collection component. It must be installed on the ECS before LTS can collect host log files according to configured paths and rules. After ICAgent is operational and the destination log stream exists, the administrator configures the relevant collection paths, parsing/collection rules, and ingestion configuration. ICAgent then packages and reports matching log records into the selected log stream.

Only after ingestion has been configured can the administrator reliably access LTS and view the collected logs for searching, analysis, monitoring, troubleshooting, or O & M.

The other alternatives violate basic dependencies by attempting to create a stream before its parent group, configuring collection before the required destination/agent exists, or installing ICAgent after collection configuration.

Reference topics: Log Tank Service; Log Groups; Log Streams; ICAgent; ECS Log Collection.

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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 correct answer is D. Available. Huawei Cloud uses Cloud Backup and Recovery to create backups of EVS disks, and the source disk must be in an operational state that permits a consistent backup operation. Huawei's official CBR and EVS documentation states that EVS disk backups can be created when disks are in the Available or In-use state.

Of the states listed in this question, only Available qualifies. A disk in the Creating state has not completed provisioning. A disk in the Deleting state is being removed and cannot serve as a stable backup source. “Deletion failed” represents an exception condition requiring remediation rather than a valid backup state. Huawei's disk-status guidance instructs administrators to troubleshoot a disk in the Deletion failed state rather than perform normal storage operations on it.

An Available disk has completed creation, is not currently attached for active I/O, and is accessible for supported management operations. Huawei Cloud can therefore associate it with a disk backup vault and create a CBR backup.

Although In-use would also be supported if included among the options, it is absent here. Consequently, Available is the only valid selection.

Reference topics: EVS Disk States; CBR Cloud Disk Backup; Backup Prerequisites.

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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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Option B is incorrect because Huawei Cloud OBS does not allow a bucket that has already had versioning enabled to return to the original Disabled state. Versioning can initially be enabled on a bucket, but once enabled, it can subsequently only be suspended , not disabled.

Option A is correct. With versioning enabled, OBS assigns unique version IDs to uploaded objects, allowing multiple objects with the same key or name to coexist as different versions. This protects against accidental overwrites and provides point-in-time recovery capabilities.

Option C is also correct when a specific historical version is permanently deleted. Each object version is independently identified by its version ID, so deleting one specified version does not inherently remove the other retained versions.

Option D accurately describes the initial state. Huawei states that versioning is disabled by default for newly created OBS buckets. When versioning has never been enabled, uploading a new object with the same name replaces the existing object instead of maintaining multiple historical versions.

The critical distinction is therefore Disabled versus Suspended . Disabled is the initial state; after versioning is enabled, it cannot be restored to Disabled.

Reference topics: OBS Versioning; Version IDs; Suspending Versioning; Object Recovery.

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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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Statements B and D are correct. Huawei Cloud CBR architecture consists fundamentally of backups, vaults, and policies. A vault is the storage container used by CBR for backup data. Huawei documentation explicitly states that CBR stores backups in vaults and that different resource categories are associated with appropriate vault types, such as server backup vaults and disk backup vaults.

Statement B is also directly supported. Huawei categorizes CBR policies into backup policies and replication policies. A backup policy automatically runs backup operations according to configured schedules and retention parameters, while a replication policy periodically replicates eligible backup data to another vault or region.

Statement A is incorrect because CBR is specifically designed to automate protection through policies; regular backups do not normally need to depend on repeated manual execution. Huawei advises using backup policies for scheduled protection.

Statement C is too absolute. CBR substantially improves recoverability against accidental deletion, malware, software failures, and hardware faults, but no backup architecture legitimately guarantees that data can never be lost under every conceivable condition.

Therefore, B and D are the verified statements.

Reference topics: CBR Architecture; Vault Management; Backup Policies; Replication Policies.

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Option D is incorrect because Huawei Cloud security-group rules are not limited to literal IP addresses as the source or destination. A security group itself can be referenced in a rule. Huawei's default security group demonstrates this directly: its inbound rule uses the default security group as the source , allowing instances belonging to that security group to communicate with one another. Therefore, another security group can form part of an access-control rule definition.

The other statements reflect the HCIA V3.5 security-group model. Huawei Cloud automatically provides a default security group when required. Its default behavior permits outbound traffic, blocks unsolicited external inbound traffic, and permits communications between instances belonging to the same default group. Option A should therefore be understood in the curriculum's simplified model of allowing outbound and denying external inbound traffic.

Options B and C correctly describe the purpose of security groups. They provide common access-control policies for ECS instances with similar security requirements. Once inbound or outbound rules are configured on the group, those rules govern the instances associated with that group rather than requiring each ECS to be configured independently.

Reference topics: Security Groups; Security Group Sources and Destinations; Default Security Group; ECS Access Control.

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1 → Bare Metal Server (BMS)

2 → Elastic Cloud Server (ECS)

3 → Physical server

The first scenario maps to BMS because Bare Metal Servers combine exclusive access to physical resources with cloud-oriented provisioning and management. Huawei Cloud recommends BMS for key or mission-critical applications and services requiring high performance. BMS retains direct physical CPU and memory access while supporting capabilities such as automatic provisioning, VPC networking, image deployment, monitoring, and cloud storage. It therefore provides both resource exclusivity and cloud flexibility .

The second scenario maps to ECS . ECS instances operate on virtualized infrastructure, so physical server resources can be shared among virtual machines. This model is appropriate for general-purpose and specialized cloud workloads where virtualization, rapid deployment, elasticity, and efficient resource utilization are priorities.

The third scenario maps to a traditional physical server . A physical server also provides exclusive resources, but Huawei's comparison shows that traditional servers do not inherently provide cloud capabilities such as automatic provisioning, VPC integration, image-based deployment, and standardized cloud monitoring. This makes them characteristic of traditional dedicated-service environments.

Huawei's comparison explicitly records exclusive resources for BMS and physical servers, but not ECS.

Reference topics: BMS, Physical Server, and ECS Comparison; Resource Exclusivity; Automatic Provisioning; Compute Architecture.

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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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