Free Huawei HCIA-Cloud Service V3.5 H13-811_V3.5 Exam Questions

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.

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.

The statement is FALSE. Huawei Cloud explicitly supports using VPN to establish communication between VPCs deployed in different regions. The Huawei Cloud VPC FAQ describes this architecture directly: VPCs in the same region can be connected by VPC peering, while VPCs in different regions can establish connectivity through VPN. In the VPN design, each VPC uses a VPN gateway, and the two gateways establish an encrypted connection over the Internet. The VPC CIDR blocks are configured as the local and remote subnets.

This distinction is central to the HCIA V3.5 networking domain. VPC peering is region-scoped: two VPCs connected through a peering connection must reside in the same region. VPN, by contrast, can establish encrypted connectivity between geographically separated VPC networks. Huawei's VPN documentation specifies creating a VPN gateway for each VPC, creating VPN connections, configuring the peer gateway EIP, defining peer subnets, and applying matching cryptographic parameters.

Consequently, saying that Huawei Cloud VPN ''does not support'' cross-region VPC communications directly contradicts the supported VPN deployment model.

Reference topics: Virtual Private Network; Cross-Region VPC Connectivity; VPC Peering; VPN Gateways.

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.

The statement is FALSE. Although an ECS group does logically organize ECS instances, its placement behavior is the opposite of what the second sentence states. Huawei Cloud ECS groups support the anti-affinity policy, which is designed to place ECS instances belonging to the same group on different physical hosts.

Anti-affinity is an availability and fault-isolation mechanism. If multiple application instances were placed on one physical server, failure of that host could simultaneously disrupt every application instance. Distributing the ECSs across different hosts reduces this correlated-failure risk and improves service reliability, high availability, and disaster tolerance.

Huawei's ECS documentation explicitly states that ECS groups support the anti-affinity policy and that ECSs in an anti-affinity group are deployed on different hosts. When an existing ECS is added to such a group, Huawei Cloud may even reallocate its host so that the placement requirement can be maintained.

Therefore, the first proposition---an ECS group logically groups ECSs---is valid. However, the assertion that ECSs in that group are created on the same physical server by default contradicts the anti-affinity design. Since the overall statement contains this incorrect condition, the correct answer is FALSE.

Reference topics: ECS Groups; Anti-Affinity Policy; Host Placement; High Availability.

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.

Option A is correct. Huawei Cloud Elastic Load Balance provides several traffic-distribution algorithms, including weighted round robin, weighted least connections, and source IP hash for shared load balancers. When backend servers have equal weights under weighted round robin, they receive an equal proportion of requests, providing the even traffic distribution described in the question.

Auto Scaling and ELB are explicitly integrated. When an AS group is associated with a load balancer, Huawei Cloud automatically associates newly added ECS instances with the load balancer and removes the association when instances leave the AS group. Therefore, option C is false; administrators do not need to manually register each dynamically created instance one by one.

Option B is incorrect in this context because the load balancer and its AS resources operate within the applicable regional/VPC deployment architecture; a standard shared ELB is not a mechanism for arbitrary cross-region backend distribution. Option D is also false because detecting unhealthy instances depends upon an enabled health-check mechanism. Disabling health checking removes the basis for making that health determination.

Reference topics: Elastic Load Balance; Auto Scaling and ELB Integration; Backend Servers; Load Balancing Algorithms.

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.

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.

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.