Pass the Huawei HCIA-Cloud Service H13-811_V3.5 Questions and answers with Dumpstech

Option C cannot be the cause because the password used to log in to the ECS operating system has no requirement to match the database credential used by an RDS instance. ECS authentication and RDS database authentication are separate security domains. An application running on an ECS connects to RDS using the database endpoint, port, database username, and corresponding database password.

Option A can cause the failure. Huawei's RDS troubleshooting guidance requires appropriate security-group rules so that traffic to the database port is permitted.

Option B can also prevent communication. Huawei Cloud states that when an ECS and RDS DB instance are deployed in different VPCs, network connectivity must be established—for example through an appropriate VPC peering connection —or the resources must be placed in a mutually reachable network.

Option D can likewise cause connection failure. Huawei's official RDS troubleshooting process specifically instructs administrators to validate the connection address and port configuration and test connectivity to the RDS listening port. Examples include port 3306 for RDS for MySQL and 5432 for PostgreSQL.

The ECS's own login password is unrelated to these connectivity requirements; therefore C is correct.

Reference topics: RDS Database Connectivity; ECS-to-RDS Communication; Security Groups; VPC Peering; Database Ports.

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The statement is false because its description of infrastructure ownership does not correctly characterize a hybrid cloud. A hybrid cloud combines different cloud environments—most commonly private cloud and public cloud —and enables workloads, applications, or data to be distributed between them according to security, capacity, latency, compliance, or business requirements.

Huawei Cloud describes hybrid cloud as a blend of private and public cloud environments. The private portion may be dedicated to a particular customer and may host confidential or sensitive workloads, while public cloud resources are delivered through infrastructure operated by a cloud service provider. Consequently, the combined infrastructure is not inherently owned and operated by a single organization .

This ownership distinction separates hybrid cloud from a purely private-cloud model. A private cloud can be dedicated to a single organization, whereas hybrid architecture deliberately combines environments that may have different infrastructure ownership and operating responsibility.

The statement correctly recognizes that hybrid cloud is flexible and that workloads can use different cloud environments, but because it makes an absolute and incorrect assertion about single-organization ownership, the entire statement must be evaluated as FALSE .

Reference topics: Cloud Deployment Models; Public Cloud; Private Cloud; Hybrid Cloud; CloudPond Service Overview.

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1 → No configuration is required

2 → Configure a VPC peering connection

3 → Create a VPN

The mappings follow Huawei Cloud's VPC connectivity rules. ECS-C and ECS-D are deployed in the same VPC , so their private network traffic can use the VPC's internal routing directly. Provided the applicable security-group rules allow the traffic, no additional VPC interconnection mechanism is required.

ECS-A and ECS-B are in different VPCs but in the same CN North-Beijing4 region. Huawei Cloud VPC peering is specifically designed to connect two VPCs in the same region using private IP addresses. Huawei documentation states that VPC peering is region-scoped and enables resources in the two peered VPCs to communicate after the required routes are configured.

ECS-A and ECS-C are located in different regions. The HCIA V3.5 networking design uses VPN for this scenario. Huawei's official VPN documentation specifically describes establishing VPN gateways and VPN connections between two VPCs in different regions, providing an encrypted communication channel across the Internet.

Therefore, the required sequence is same VPC → no additional configuration; same-region different VPCs → peering; cross-region VPCs → VPN .

Reference topics: VPC Communication; VPC Peering; VPN; Intra-VPC Networking.

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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 supported notification methods represented in this question are SMS and email , so the correct selections are A and D .

Huawei Cloud CTS supports key event notification for significant operations. Administrators can identify operations that require immediate awareness and configure notification delivery through Simple Message Notification (SMN). When the configured key event occurs, CTS works with SMN to deliver the corresponding notification to subscribed recipients.

Huawei's official CTS documentation specifically states that SMN can send key-event messages to users' mobile phones or email addresses . A notification sent to a mobile phone in this context corresponds to SMS messaging. Email subscriptions similarly deliver the notification to the registered email endpoint.

This mechanism provides proactive visibility into sensitive cloud operations rather than requiring administrators to continually query CTS records. Typical use cases include monitoring resource deletion, security configuration changes, permission-related operations, or other high-risk administrative actions.

Neither WeChat nor a conventional phone call is identified by Huawei CTS as one of the notification methods in this key-event mechanism. Those options therefore do not satisfy the documented CTS notification workflow.

Reference topics: CTS Key Event Notification; Simple Message Notification; Operation Auditing; O & M Notifications.

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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.

The statement is TRUE . Huawei Cloud distinguishes ordinary EVS disks from shared EVS disks . A standard non-shared EVS disk can normally be attached to only one server at a time, whereas a shared disk is specifically designed so that multiple supported servers can access the same block-storage device. Huawei documentation states that a shared EVS disk can be attached to multiple servers simultaneously, with supported implementations allowing attachment to as many as 16 servers.

The deletion requirement is equally explicit. A shared EVS disk cannot remain attached to any server when the disk itself is being deleted. Huawei requires administrators to detach the shared disk from all servers before deletion . If the disk is attached to several servers and is detached from only some of them, it remains in the In-use state. Only after it has been detached from every server does its state return to Available, permitting subsequent deletion operations.

Huawei additionally cautions that shared block storage does not itself provide cluster coordination. Appropriate cluster software or shared-file-system mechanisms must manage simultaneous reads and writes to prevent corruption.

Thus, both parts of the question precisely reflect Huawei Cloud's EVS shared-disk lifecycle requirements.

Reference topics: Shared EVS Disks; Attaching Shared Disks; Detaching EVS Disks; EVS Lifecycle Management.

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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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